System 450 Series Control Modules with Relay Outputs Installation Guide (C450CBN-3, C450CCN-3)

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System 450™ Series Control Modules with Relay Outputs
Installation Instructions
C450CBN-3 Part No. 24-7664-2896, Rev. E
C450CCN-3 Issued March 2016

Application C450CxN-3 models are Single-Pole, Double-Throw
(SPDT) relay control modules with Liquid Crystal
IMPORTANT: Use this System 450™ Series Display (LCD) and four-button touch pad User
Control Module with Relay Outputs only as an Interface (UI) that allows you to set up a System 450
operating control. Where failure or malfunction of the control system. C450CBN-3 models provide one SPDT
System 450™ Series Control Module could lead to relay. C450CCN-3 models provide two SPDT relays.
personal injury or property damage to the controlled
Refer to the System 450™ Series Modular Control
equipment or other property, additional precautions
Systems with Standard Control Modules Technical
must be designed into the control system. Incorporate
Bulletin (LIT-12011459) for more detailed information
and maintain other devices, such as supervisory or
on designing, installing, setting up, and troubleshooting
alarm systems or safety or limit controls, intended to
System 450 Series control systems. The System 450
warn of or protect against failure or malfunction of the
technical bulletin can be accessed and downloaded on
System 450™ Series Control Module.
the Johnson Controls® Online Product Literature Web
IMPORTANT: Utiliser ce System 450™ Series site at the following Web address:
Control Module with Relay Outputs uniquement en http://cgproducts.johnsoncontrols.com/default.aspx.
tant que dispositif de régulation. Lorsqu'une
défaillance ou un dysfonctionnement du System Installation
450™ Series Control Module risque de provoquer 13
des blessures ou d'endommager l'équipement (1/2)
contrôlé ou un autre équipement, la conception du
système de contrôle doit intégrer des dispositifs de
protection supplémentaires. Veiller dans ce cas à
intégrer de façon permanente d'autres dispositifs, 75
128 (2-15/16)
tels que des systèmes de supervision ou d'alarme,
(5) 35 mm
ou des dispositifs de sécurité ou de limitation, ayant DIN Rail
une fonction d'avertissement ou de protection en Mount
Channel
cas de défaillance ou de dysfonctionnement du
System 450™ Series Control Module. 40
(1-9/16) 38
System 450™ is a family of modular, digital electronic (1-1/2)
controls that is easily assembled and set up to provide
63 63
reliable temperature, pressure, and humidity control for (2-1/2) (2-1/2)
a wide variety of Heating, Ventilating, Air Conditioning,
and Refrigeration (HVACR) and commercial/industrial
process applications. 1/2 in. Conduit Hole

FIG:new_enclosure_dims
(Nominal Trade Size)
The System 450 control modules allow you to 63
(2-1/2)
configure custom application-specific control systems
with up to three input sensors and ten (relay and/or
analog) outputs, including control systems that can
monitor and control temperature, pressure, and Figure 1: System 450 Module Dimensions, mm (in.)
humidity applications simultaneously.
You can easily install and quickly configure a
stand-alone System 450 control module and sensor in
the field as a replacement control for almost any
temperature, pressure, and humidity control.

System 450™ Series Control Modules with Relay Outputs Installation Instructions 1
Location Considerations 3. Place the assembly over screw heads on the
Observe the following System 450 location guidelines: mounting slots, and carefully tighten the mounting
screws.
• Ensure that the mounting surface can support the
module assembly, mounting hardware, and any Note: If you mount the modules on an uneven
(user-supplied) panel or enclosure. surface, do not damage the housings when
tightening mounting screws. Use shims/washers to
• Mount the modules upright and plugged together in mount module assembly evenly on the surface.
a horizontal row where possible (Figure 3). DIN rail
mounting is highly recommended. Refer to the control sensor installation instructions for
information on locating and mounting control sensors.
• Mount modules on flat even surfaces.
Wiring
• Allow sufficient space for wires and connections.
See Figure 2 and Table 1 for electrical termination
• Mount the modules in locations free of corrosive locations and wiring information. See Technical
vapors and observe the ambient operating Specifications on page 24 for electrical ratings.
conditions listed in the Technical Specifications.
• Do not mount the modules on surfaces that are WARNING: Risk of Electric Shock.
Disconnect or isolate all power supplies
prone to vibration or in locations where radio
frequency or electromagnetic emissions may
! before making electrical connections.
cause interference. More than one disconnection or isolation
may be required to completely
• Do not install the modules in airtight enclosures. de-energize equipment. Contact with
• Do not install heat-generating devices in an components carrying hazardous voltage
enclosure with the modules that may cause the can cause electric shock and may result
temperature to exceed the ambient operating limit. in severe personal injury or death.
AVERTISSEMENT : Risque de
Mounting
décharge électrique.
Mount System 450 modules on 35 mm DIN rail Débrancher ou isoler toute alimentation
(recommended) or directly to an even wall surface. To avant de réaliser un raccordement
mount modules on DIN rail: électrique. Plusieurs isolations et
1. Provide a section of 35 mm DIN rail that is longer débranchements sont peut-être
than the module assembly width, and mount the nécessaires pour -couper entièrement
DIN rail horizontally in a suitable location using l'alimentation de l'équipement. Tout
appropriate mounting hardware/fasteners. contact avec des composants porteurs
de tensions dangereuses risque
2. Clip the control module on the rail, position the d'entraîner une décharge électrique et de
upper DIN rail clips on the top rail, and gently snap provoquer des blessures graves, voire
the lower clips onto the rail. mortelles.
3. Clip the remaining power and/or expansion
modules to the right of the control module on to the IMPORTANT: Use copper conductors only. Make
DIN rail and plug the 6-pin module connectors all wiring in accordance with local, national, and
together (Figure 3). regional regulations.
Note: If your System 450 control system uses a
power module, the power module must be plugged IMPORTANT: Do not exceed the System 450
into the right-hand side of the control module. module electrical ratings. Exceeding module
electrical ratings can result in permanent damage to
To direct-mount modules to wall surfaces: the modules and void any warranty.
1. Plug the modules together, remove the module
covers, place the assembly against wall surface IMPORTANT: Run all low-voltage wiring and
horizontally in a suitable location and mark the cables separate from all high-voltage wiring.
mount hole locations on the surface (Figure 1). Shielded cable is strongly recommended for input
(sensor) and analog output cables that are exposed
2. Install appropriate screw fasteners, leaving screw
to high electromagnetic or radio frequency noise.
heads approximately one to two turns away from
flush to the surface.

2 System 450™ Series Control Modules with Relay Outputs Installation Instructions
IMPORTANT: Electrostatic discharge can damage
System 450 modules. Use proper Electrostatic
Discharge (ESD) precautions during installation and
servicing to avoid damaging System 450 modules.

IMPORTANT: Do not connect 24 VAC supply
power to the System 450 modules before finishing
wiring and checking all wiring connections. Short
circuits or improperly connected wires can result in
damage to the modules and void any warranty.

IMPORTANT: A System 450 control module and
module assembly can be connected to an internal
power source (a System 450 power module) or an
external power source (24 V power connected to the
24V and COM terminals on the control module), but
must not be connected to both power sources
simultaneously. Connecting a control module to both
internal and external power sources can damage the
modules and void any warranty.

IMPORTANT: When connecting System 450
compatible sensors with shielded cable to a
System 450 control module, connect the cable
shield drain lead to one of the C (common) terminals
on the input sensor terminal block. Do not connect
the shield at any other point along the cable. Isolate
and insulate the shield drain at the sensor end of the
cable. Connecting a cable shield at more than one
point can enable transient currents to flow through
the sensor cable shield, which can cause erratic
control operation.

System 450™ Series Control Modules with Relay Outputs Installation Instructions 3
Note: The relay output terminals connect to an internal SPDT
relay and do not supply any power to the application. Supply Power and
Control Sensor Terminals
Low Voltage (<30 V)
Internal
SPDT Relay Sn2
Normally Closed/Off 24V
Position C
C
Sn3
Sn1
5V
6-Pin C
Module
Connector Common (C) terminals

LNC1 LNO1
are connected
LC1
internally.

FIG:sys450_rly_cntrl_wir
Dry-Contact, Line-Voltage
Relay Output Terminals
(See Technical Specifications Some models have
for Electrical Ratings.) a second output relay
and terminal block labeled
LNC2, LNO2, and LC2.

Figure 2: C450CxN-3 Wiring Terminals

0-10 VDC or
Sn-1 4-20 mA
Sn-2
Sn-3 Analog Output
Signal

Active/Passive Sensor Jumpers AO1 COM AO2

FIG:sys450_app_exmpl
L1
L1 L2

L2
L1

Note: In 120 VAC applications, L1 must be the Hot lead
and L2 must be the Neutral/Common lead.

Figure 3: Example System 450 Heat/Cool System with Condenser Fan Speed Control

4 System 450™ Series Control Modules with Relay Outputs Installation Instructions
Status or Setup Value: Displays the current Light-Emitting Diode (LED): Green LEDs
input status, output status or setup parameter on Relay Control Module and Relay
value for the displayed input sensor, output Expansion Modules (only) indicates if the
and/or setup parameter. Press or to select associated relay output is on or off.
a different parameter value when the value
is flashing. (Here, 100 = 100%.) Output Number: Displays a numerical
value that identifies the output associated
with the status or setup value shown
Status or Setup Identifier: Displays the on the screen. Output numbers are
unit of measurement, output, sensor number, automatically determined by the outputs'
or setup parameter for the displayed status or physical positions (left to right) in the
setup value. (Here, the setup identifier OSP module assembly. (Here, 4 = Output 4.)
represents % output signal strength at setpoint.)
Control Ramp Icon: Displays whether an
analog output (only) is set as direct-acting
Menu Button: Press M to move through the M or reverse acting, and whether the output
sensor and output setup start screens. signal strength is at minimum or maximum
When moving through the status or setup when the sensed property is at Setpoint.
screens, press M to return to the status start The control ramp icon displayed is
screen or set up start screen. determined by the output's SP, EP, OSP,
and OEP setup values.

Up and Down Buttons: Press or to select Next Button: In the Main screens,

FIG:sys450cntrl_modul
a different value for any flashing value in the press to scroll through the system status
setup value field. In the Main (sensor status) screens. In a setup screen, press to save
screens, press and hold both and for the (flashing) setup value and go to the
5 seconds to access the Setup Start screens. next setup screen.

Figure 4: System 450 Control Module Output Relay LEDs,
LCD, Four-Button Touch Pad User Interface

Table 1: System 450 Terminal Wiring Information
Label Terminal Function Wire Sizes
24V Accepts 24 VAC supply power, when a C450YNN power module is not connected, 0.08 mm2 to 1.5 mm2
and provides power terminal for 24 VAC (humidity) sensors. 28 AWG to 16 AWG
5V Provides 5 VDC power for active sensors.
Sn-1, Sn-2, Accepts passive or active (0–5 VDC) input signals from sensors.
Sn-3 Note: You must position the Active/Passive Sensor Jumper (Figure 3 and
Figure 6) correctly for each sensor in your control system before operating the
system. See Setting Active/Passive Sensor Jumpers for more information.
C Provide low-voltage Common connections for 24 VAC power and passive or active
(Three sensors connected to the 5V, Sn1, Sn2, and Sn3 terminals.
Terminals) Note: The three C terminals are connected internally and can be connected to
ground in the field.
LNC1, LNC2 Connects control circuit to the Normally Closed (N.C.) contact on the SPDT relay. 0.08 mm2 to 2.5 mm2
LNO1, LNO2 Connects control circuit to the Normally Open (N.O.) contact on the SPDT relay. 28 AWG to 14 AWG
LC1, LC2 Connects line (power) to Common (C) on the SPDT1 relay.

1. See Internal SPDT Relay insert in Figure 2 for more System 450 relay contact and terminal information. See Technical
Specifications for SPDT relay electrical ratings.

System 450™ Series Control Modules with Relay Outputs Installation Instructions 5
Setup and Adjustments Sensor 1: Jumper positioned on one pin
(or removed) sets Sn-1 to Active (Pressure).
System 450 Component Requirements
Sensor 2: Jumper positioned across two
A System 450 control system consists of one control pins sets Sn-2 to Passive (Temperature).
Sn-1
Sys450_jmprs
module, one to three control sensor inputs, and one to
ten outputs that provide On/Off control and/or analog
Sn-2 Sensor 3: Jumper positioned across two
control. Figure 3 shows an example System 450 Sn-3 pins sets Sn-3 to Passive (Temperature).

module assembly with two input sensors and three Figure 5: Active/Passive Sensor Terminal Pin
outputs (two relay outputs and one analog output). Block Set Up for the Example in Figure 3
Setting Up a System 450 Module Assembly
To set up a System 450 module assembly:
Setting Up a Control System in the User
Interface
1. Determine the controlled conditions, sensor types, System 450 control modules have a backlit LCD and a
and value ranges required for your application, and four-button touch pad UI (Figure 4) that enable you to
select the appropriate System 450 sensor types. set up your control system. To set up a control system
2. Determine the number and type (relay or analog) of in the System 450 UI:
outputs required to control your application, and 1. Build your control system module assembly and
select the appropriate System 450 control module connect it to power. See Setting Up a System 450
and expansion modules to provide the outputs. Module Assembly on page 6.
3. Assemble the control and expansion modules in
Note: Every time a module assembly is powered
the proper order, starting with the control module
ON, the control module polls all of the modules to
on the left.
identify output type (relay or analog) and assigns a
Note: If you use a C450YNN-1 power module, it sequential output number (1 to 9 [0 = 10]) to each
must be plugged into the control module. Plug in output starting with the control module output on
any expansion modules (for your control system) to the left. The output numbers identify each output’s
the right of the power module. setup screens in the UI. (See Figure 4.)
4. Apply supply power to the module assembly. 2. Access the System 450 setup screens in the UI.
You can now set up your control system in the See Accessing the System 450 Setup Start
System 450 reset control module UI. Screens on page 8.
3. Set up the control system inputs in the UI. See
Note: After you power on your module assembly, you
Setting Up System 450 Sensors on page 8.
can set up your control system in the control module UI
before wiring the sensors or outputs to your assembly. 4. Set up the control system outputs in the UI. See
Setting Up System 450 Outputs on page 11.
Setting Active/Passive Sensor Jumpers
Before putting your System 450 reset control system IMPORTANT: Do not change the module positions
into operation, you must set up each sensor in your after a System 450 control system is set up in the UI.
system as either passive or active by positioning the System 450 control logic is set up in the UI according
jumper on the terminal pins on the terminal block to the Sensor Types, the output types, and the output
located below the sensor terminal block. See Figure 3. numbers. Changing modules or module positions in a
module assembly that is already set up in the UI can
Temperature sensors are passive (two-wire) sensors
change the output numbers, output types, and the
and the corresponding jumpers must be positioned
setup values of the assembly outputs, which requires
across both pins. Humidity and pressure transducers
setting up the outputs again.
are active (three-wire) sensors and corresponding
jumpers must be positioned on one pin (or removed Use the worksheet provided on page 24 to plan and
completely). Figure 5 shows the jumper positions for record the settings for your System 450 control system.
the System 450 example shown in Figure 3.

6 System 450™ Series Control Modules with Relay Outputs Installation Instructions
Viewing the Startup, Main, and System Status The System Status screens display the current status
Screens of each input and output in your control system. With
Every time you connect power to a System 450 control the Main screen displayed, press repeatedly to scroll
module, the Startup screen appears for several through and view all of the status screens in your
seconds before the Main screens appear. The Startup control system. See Table 2 for more information about
screen displays the current firmware version for the the System Status screens.
module. See Table 2 and System 450 Firmware System 450 Firmware Versions
Versions for more information.
System 450 firmware versions identify the features
After you install, wire, power on, and set up your available on System 450 modules. Standard System
control system in the UI, the Main screens appear on 450 control modules with Version 2.00 firmware and
the LCD, immediately after the Startup screen. During later include the High Input-Signal Selection and
normal operation, the Main screens automatically scroll Differential Control features. See High Input-Signal
through the current status of each sensor in your Selection on page 10 and Differential Control on page
control system. See Table 2 for more information. 17 for more information.
Table 2: System 450 Startup Screen, Main Screens, Status Screens, and Setup Start Screens Information
and Procedures
LCD Screen Name, Description/Function, User Action, and Example
Startup Screen: When you power a System 450 control module, the LCD displays the control module’s
2.00 current firmware version for approximately five seconds before it displays the Main (Input Status) screen.
Screen example shows System 450 firmware version number 2.00 on the top of the screen. The number on
XXXX the bottom of the screen (indicated in this example with xxxx) identifies the Johnson Controls firmware.

Main (Input Status) Screens: During normal operation, the Main screens automatically scroll through the
232 1
current status of each input sensor in your control system and display the sensor number, the unit of
measurement, and the sensed condition value. See Figure 7 and Figure 8 for example Main screens.
PSI Note: Main screens are view-only; selections are not made in Main screens. The Main screens are the
System 450 default screens. After 2 minutes of inactivity in any screen, the UI reverts to the Main screens.
While the Main screens are scrolling, you can press repeatedly to scroll through and view the
74 2
System Status screens for all inputs and outputs in your control system.
ºF While the Main Screens are scrolling, you can press and hold and for 5 seconds to access
your control system’s Setup Start screens.
The screen examples show Sensor 1 sensing 232 psi and Sensor 2 sensing 74°F.
System Status Screens: The System Status screens display current status of all inputs and outputs in
your control system. System Status screens are view-only; selections are not made in Status screens.
On 1
Relay output status screens display output number and relay status (On/Off). Analog output status screens
OUT display output number, signal strength, and control ramp icon.
Press repeatedly to scroll and view the System Status screens for the inputs and outputs in your
control system. When you stop pressing , the displayed Status screen refreshes its value and
613
remains displayed for 2 minutes before returning to the Main Screens.
OUT The screen examples show Output 1 relay is On and Output 3 signal strength is 61% of the total signal
strength. The control ramp icon in the bottom screen example indicates that the Analog Output is set up
with SP<EP and OSP<OEP. See Setting Up an Analog Output for Standard Control or High Input-Signal
Selection Control for information about ramp icons.
Setup Start Screens: Setup Start screens are view-only screens, from which you can access the setup
screens for the sensors or the displayed output; selections are not made in Setup Start screens.The Sensor
–– – Setup Start screen is the first screen displayed when you access the System 450 setup screens.
SENS Note: The numerical order and type of Output Setup Start screens are determined by the modules
selected for your System 450 control system and their physical order in the control system module
assembly. See Setting Up a Control System in the User Interface on page 6 for more information.
–– – From the Sensor Setup Start screen, press M repeatedly to scroll through the Output Setup Start
1 screens for all of the outputs in your control system. When a Setup Start screen is displayed,
OUTR
press to go to the setup screens for the sensors or the output displayed in the screen.
Note: In any Setup Start screen, you can return to the Main screens by pressing both and
–– – simultaneously. Also, the UI returns to the Main screen after 2 minutes of inactivity in any screen.
3
OUTA The screen examples show the Sensor, Relay Output 1, and Analog Output 3 Setup Start screens.

System 450™ Series Control Modules with Relay Outputs Installation Instructions 7
Accessing the System 450 Setup Start Screens 3. Press M repeatedly to scroll through the Output
Access the System 450 Setup Start screens from the Setup Start screens. See Figure 7.
Main screen. See Table 2 for more information about Note: The UI returns to the Main screens after 2
the Setup Start screens. minutes of inactivity in any screen in the UI.
To access the System 450 setup screens: Setting Up System 450 Sensors
1. Apply power to your module assembly. After the You must set up the input sensors for your control
Startup screen appears briefly (displaying the system before you can set up any of outputs. To set up
control module firmware version), the Main screen the input sensors you must access the setup screens.
appears on the LCD. See Accessing the System 450 Setup Start Screens.
2. In the Main screen, press and hold and The Sensor Setup Start screen is the first screen
simultaneously for 5 seconds to access the setup displayed when you access the system setup screens.
screens and to go to the Sensor Setup Start Table 3 provides information about System 450
screen. sensors, Sensor Types, parameter values, and
specified sensor/transducer product code numbers.
Table 3: System 450 Sensor Types, Setup Values, and Sensor/Transducer Product Codes
Sensor Unit of Measurement Effective Range of Resolution Minimum Sensor Product
Type Value Sensing Usable Increment Proportional Type Number2
(Condition/Units) Range Values1 Value or Control
Band
F F (Temperature/degrees) -46 to 255 -40 to 250 1 1 A99B-xxx
C C (Temperature/degrees) -43 to 124 -40 to 121 0.5 0.5 A99B-xxx
rH % (Humidity/%RH) 1 to 100 10 to 95 1 2 HE-67Sx-xxxxx
HE-67Nx-xxxxx
HE-68Nx-0N00WS
P 0.5 INWC (Pressure/in. W.C.) 0 to 0.5 0.025 to 0.5 0.005 0.025 DPT2650-0R5D-AB
P 2.5 INWC (Pressure/in. W.C.) 0 to 2.5 0.1 to 2.5 0.02 0.1 DPT2650-2R5D-AB
P5 INWC (Pressure/in. W.C.) 0 to 5.0 0.25 to 5.0 0.05 0.25 DPT2650-005D-AB
P8 bAR (Pressure/bar) -1 to 8 -1 to 8 0.05 0.1 P499Rxx-401C
P 10 INWC (Pressure/in. W.C.) 0 to 10 0.5 to 10 0.05 0.2 DPT2650-10D-AB
P 15 bAR (Pressure/bar) -1 to 15 -1 to 15 0.1 0.2 P499Rxx-402C
P 30 bAR (Pressure/bar) 0 to 30 0 to 30 0.1 0.4 P499Rxx-404C
P 50 bAR (Pressure/bar) 0 to 50 0 to 50 0.2 0.4 P499Rxx-405C
P100 PSI (Pressure/psi) 0 to 100 0 to 100 0.5 1 P499Rxx-101C
P1103 Hg/PSI (Pressure/Hg-psi) -10 to 100 -10 to 100 0.5 1 P499Rxx-100C
P200 PSI (Pressure/psi) 0 to 200 0 to 200 1 1 P499Rxx-102C
P500 PSI (Pressure/psi) 0 to 500 90 to 500 1 5 P499Rxx-105C
P750 PSI (Pressure/psi) 0 to 750 150 to 750 2 6 P499Rxx-107C
HIF F (Temperature/degrees) -50 to 340 -40 to 340 4 1 1 TE-631x, TE-6000-x
TE-68NT-0N00S
HIC C (Temperature/degrees) -45.5 to -40 to 1704 0.5 0.5 TE-631x, TE-6000-x
170 TE-68NT-0N00S

1. Because of the way that the System 450 Differential Sensor (Sn-d) is set up and calculated with two identical sensors (Sn-
1 and Sn-2), the Range of Usable Values is twice as large as a single sensor. Each Sensor Type has an equal number of
positive and negative values. See Table 9 for the Range of Usable Values when an output references Sn-d.
2. Refer to the System 450 Series Modular Controls Product Bulletin (LIT-12011458), Catalog Page (LIT-1900549), or
Technical Bulletin (LIT-12011459) for additional ordering information for System 450 compatible sensors and transducers.
3. See Setting Up Outputs That Reference a P110 Sensor on page 10 for information on setting up System 450 outputs that
reference the P110 Sensor Type.

8 System 450™ Series Control Modules with Relay Outputs Installation Instructions
4. Many of the 1,000 ohm Nickel temperature sensors that can be set up as HI°F or HI°C Sensor Types are not designed for
use across the entire Range of Usable Values for HI°F and HI°C Sensor Types. Refer to the Technical Specifications
sections in the TE-6000 Series Temperature Sensing Elements Product Bulletin (LIT-216288), the TE-6300 Series
Temperature Sensors Product Bulletin (LIT-216320), and the TE-6800 Series Temperature Sensor Product Bulletin
(LIT-12011542) to determine the temperature range that the various 1,000 ohm Nickel temperature sensors are specified to
operate in.

Table 4 provides sensor setup information, procedures,
and example screens. Figure 7 on page 22 provides a
System 450 UI setup example.
Table 4: System 450 Sensor Setup Screen Information and Procedures (Part 1 of 2)
LCD Screen Name, Description/Function, User Action, and Example
Sensor Setup Start Screen: The Sensor Setup Start screen is the first screen displayed when you
access the System 450 setup screens. From the Sensor Setup Start screen you can navigate to the
–– – Output Setup Start screens or the Sensor Setup screens. See Figure 7.
SENS Note: You must set up the input sensors before you can set up the control system outputs. The Sensor
Setup Start screen is view-only; selections are not made in Setup Start screens.
1. In the Sensor Setup Start screen, press to go to the first Sensor Type Selection screen
(Sn-1) and begin setting up the sensors in your control system.
The screen example shows the Sensors Setup Start screen with flashing dashes.
Sensor Type Selection Screens: The Sensor Type you select for an input sensor automatically
determines the setup parameters and values for each output that is set up to reference that sensor. See
P500 Table 3 for information about System 450 sensors/transducers, Sensor Types, condition type, units of
Sn-1 measurement, minimum control band or proportional band, setup values, value ranges, and product code
numbers.
Note: For outputs to operate properly, the selected Sensor Type must match the sensor/transducer
model wired to the control module, and the sensor/transducer must be wired to the proper control module
ºF input terminals.
Sn-2 2. In the Sn-1 Sensor Type Selection screen, press or to select the desired Sensor Type.
Press to save your selection and go to the Sn-2 Sensor Type Selection screen.
3. In the Sn-2 Sensor Type Selection screen, press or to select the desired Sensor Type.
–– Press to save your selection and go to the Sn-3 Sensor Type Selection screen.
Sn-3 Note: If your control system does not use three input sensors, simply press while the two dashes are
flashing in a Sensor Type Selection screen to save no Sensor Type and go to the next setup screen.
4. In the Sn-3 Sensor Type Selection screen, press or to select the desired Sensor Type.
Press to save your selection and either:
• go to the Temperature Offset Setup screen for the first temperature sensor in your system.
• return to the Sensor Setup Start Screen, if your control system has no temperature sensors.
Note: Beginning with firmware Version 2.00, if you select the same Sensor Type for Sn-1 and Sn-2, two
additional functional sensors (Sn-d and HI-2) are available for selection when you set up the control
system outputs. If you select the same Sensor Type for Sn-1, Sn-2 and Sn-3, then functional sensor HI-3
is also available for selection when you set up outputs. See High Input-Signal Selection on page 10 and
Differential Control on page 17 for more information.
The screen examples show Sn-1 with the P500 Sensor Type selected; Sn-2 with the °F Sensor Type
selected; and Sn-3 with the no Sensor Type selected.
Temperature Offset Selection Screens: Select a temperature offset for the temperature inputs (only) in
your control system.
–3 2
Sensor Type °F enables an offset of +/- 5°F in 1 degree increments.
OFFS Sensor Type °C enables an offset of +/- 2.5°C in 0.5 degree increments.
Note: The temperature offset changes the displayed temperature value by the selected offset value.
5. Press or to select the desired temperature offset value. Press :
• to go to the next Temperature Offset Selection screen (if there are additional temperature
sensors in your control system) and repeat this step for each temperature sensor.
• to return to the Sensor Setup Start screen.
The screen example shows an OFFS value of -3 (°F) for Sensor 2. Therefore a sensed temperature value
of 75 (°F) at Sensor 2 is displayed as 72 (°F).

System 450™ Series Control Modules with Relay Outputs Installation Instructions 9
Table 4: System 450 Sensor Setup Screen Information and Procedures (Part 2 of 2)
LCD Screen Name, Description/Function, User Action, and Example
Sensor Setup Start Screen: When you have finished setting up all of the sensors for your control
system, the display returns to the Sensor Setup Start screen.
–– – Note: You can edit the sensor set up values at any time, if required. However, changing the Sensor Type
SENS for a sensor that is referenced by an output requires setting up the output again to the new Sensor Type
values.
After the sensors are set up for your control system, you can:
• Press M to scroll through the Output Setup Start screens and begin setting up your system
outputs.
• Press and simultaneously to return to the Main screens.
The screen example shows Sensors Setup Start screen with flashing dashes.

Setting Up Outputs That Reference a P110 Sensor High Input-Signal Selection
The P110 Sensor Type can monitor negative pressure Beginning with firmware Version 2.00, standard
down to 20 InHg (-10 psi). When referencing a P110 System 450 control modules include the High
sensor, System 450 displays negative pressure values Input-Signal Selection control capability.
in InHg on the Main and System Status screens.
The High Input-Signal Selection feature enables a
But when you set up an output that references a P110 System 450 control system to monitor a condition
sensor and the setup value is a negative pressure (temperature, pressure, or humidity) with two or three
value, you must select a pressure value in negative psi. sensors (of the same type) and control relay and/or
Use Table 5 to determine the negative PSI setup value analog outputs based on the highest condition value
that corresponds to your InHg target value. For sensed by the two or three referenced sensors.
example, if you want a relay output to go off when the In two sensor applications (HI-2), Sn-1 and Sn-2 must
sensed pressure reaches 7 InHg, you select the value be the same Sensor Type. In three sensor applications
-3.5 (psi) in the output’s Relay OFF Selection screen. (HI-3), Sn-1, Sn-2, and Sn-3 must be the same Sensor
Table 5: InHg Target Values/PSI Setup Values Type.
InHg psi Setup InHg psi Setup A System 450 control system, using High Input-Signal
Value Value Value Value Selection, can monitor the outlet pressures of two
1 -0.5 11 -5.5 condenser coils in a multi-circuit condensing unit using
two pressure sensors of the same type; one connected
2 -1.0 12 -6.0
to each coil outlet.
3 -1.5 13 -6.5
If the multi-circuit condensing unit has single speed fan
4 -2.0 14 -7.0
motors, multiple relay outputs can be set up to
5 -2.5 15 -7.5 reference the high input-signal and System 450 can
6 -3.0 16 -8.0 stage the fans on and off based on the pressure
7 -3.5 17 -8.5 sensed at the coil with the highest pressure.
8 -4.0 18 -9.0 If the multi-circuit condensing unit has variable speed
9 -4.5 19 -9.5 fan motors, one or more analog outputs can be set up
to reference the high input-signal and control the fan
10 -5.0 20 -10.0
motor speeds based on the pressure sensed at the coil
with the highest pressure.
Note: When an output references the P110 Sensor
Type and the output is set up for Differential Control
(Sn-1 and Sn-2 are P110 Sensor Type), the negative
pressure values displayed in the differential pressure
System Status screen (dIFP) are displayed as negative
psi values, not InHg values. See Differential Control on
page 17 for more information.

10 System 450™ Series Control Modules with Relay Outputs Installation Instructions
Setting Up System 450 Outputs 4. To set up standard Relay Outputs and Relay
Outputs with High Input-Signal Selection, see
After you build and connect power to your control
Setting Up a Relay Output for Standard Control or
system module assembly, the output numbers and
output types for your control system are automatically High Input-Signal Selection Control and Table 6 for
assigned in the UI. setup information and procedures.
5. For standard Analog Outputs and Analog Outputs
Note: You must set up the input sensors for your
with High Input-Signal Selection, see Setting Up an
control system before you can set up the outputs. See
Analog Output for Standard Control or High Input-
Setting Up System 450 Sensors on page 8 for more
Signal Selection Control and Table 8 for setup
information.
information and procedures.
To set up System 450 outputs in the UI:
6. For Relay Outputs with Differential Control, see
1. Apply power to your module assembly. After the Setting Up an Output for Differential Control on
Startup screen appears briefly (displaying the page 17 and Table 10.
control module firmware version), the Main screen 7. For Analog Outputs with Differential Control, see
appears on the LCD. Setting Up an Output for Differential Control on
2. In the Main screen, press and hold and page 17 and Table 11.
simultaneously for 5 seconds to access the setup Setting Up a Relay Output for Standard Control or
screens and to go to the Sensor Setup Start High Input-Signal Selection Control
screen. Table 6 provides information, procedures, guidelines,
3. At the Sensor Setup Start screen, press M and screen examples for setting up relay outputs for
repeatedly to scroll through and select the desired standard or High Input-Signal Selection control. See
Output Setup Start screen. The Output Setup Figure 7 on page 22 for example menu flow of the
Start screen indicates the output number and the Relay Output 1 set up in Table 6.
output type for the selected output.
Table 6: System 450 Setup Screen Information and Procedures for Relay Outputs with Standard Control
and High Input-Signal Selection Control (Part 1 of 3)
LCD Screen Name, Description/Function, User Action, and Example
Relay Output Setup Start Screen: The output numbers and the output type (relay or analog) are
determined by the module types and configuration of your control system’s module assembly and are
–– – 1
automatically assigned when you connect power to the module assembly. (See Setting Up a Control
OUTR System in the User Interface on page 6.)
Note: You must set up the control system input sensors before you can set up the outputs.
1. In the Relay Output Setup Start screen, press to go to the output’s Sensor Selection screen.
The screen example shows a Relay Output Setup Start screen for Output 1.
Sensor Selection Screen: The sensor you select here determines the output’s setup parameters and
values, including condition type, unit of measurement, minimum control band, default setup values, and
–– setup value ranges for several of the remaining output setup screens. If a sensor is not selected, the
1 remaining output setup screens do not appear. If a sensor is already selected for this output, the Sensor
SENS
Selection screen does not appear here and the Relay ON Selection (ON or dON) screen appears instead.
Note: You must select a sensor in this Sensor Selection screen and the selected sensor must be already
set up in the System 450 UI. (See Setting Up System 450 Sensors.)
Sn–2 Note: Beginning with firmware Version 2.00, the functional sensors Sn-d and HI-2 are available, if Sn-1
SENS1 and Sn-2 are the same Sensor Type. If Sn-1, Sn-2, and Sn-3 are the same Sensor Type, the functional
sensor HI-3 is also available.
2. Press or to select the sensor that this output references:
Sn–d 1
• For standard control action, select Sn-1, Sn-2, or Sn-3.
SENS • For standard control action with High Input-Signal Selection, select HI-2 or HI-3.
Then press to save your sensor selection and go to the Relay ON Selection screen.
Note: For Differential Control, select Sn-d and go to Table 10 on page 18 for information, procedures,
HI–2 1
guidelines, and screen examples for setting up outputs for Differential Control.
The top screen example shows the initial Sensor Selection screen for Relay Output 1 before a sensor is
SENS
selected. The remaining screen examples show some of the sensors that may be available for selection.
For the Output Relay example, Sn-2 is selected as the Sensor for Output 1 as shown in the second
screen.

System 450™ Series Control Modules with Relay Outputs Installation Instructions 11
Table 6: System 450 Setup Screen Information and Procedures for Relay Outputs with Standard Control
and High Input-Signal Selection Control (Part 2 of 3)
LCD Screen Name, Description/Function, User Action, and Example
Relay ON Selection Screen: Select the value at which the relay turns On. Relay ON is defined as relay
LED On/Lit, relay contacts N.O. to C are closed, and N.C. to C contacts are open.
78 Note: The value ranges and minimum control band are determined by the Sensor Type selected for the
ON 1 sensor that the output references and are enforced in the Relay ON and Relay OFF Selection screens.
3. Press or to select the value at which the output relay turns On, then press to save your
selection and go to Relay OFF Selection screen.
The screen example shows an ON value of 78 (°F) selected for Relay Output 1.
Relay OFF Selection Screen: Select the value at which the relay turns Off. Relay OFF is defined as
relay LED Off, relay contacts N.C. to C are closed, and N.O. to C contacts are open.
Note: The value ranges and minimum control band are determined by the Sensor Type selected for the
OFF 1 sensor that the output references and are enforced in the Relay ON and Relay OFF Selection screens.
4. Press or to select the value at which output relay turns Off, then press to save your
selection and go to Minimum Relay ON TIme Selection screen.
The screen example shows an OFF value of 75 (°F) selected for Relay Output 1.
Minimum Relay ON Time Selection Screen: Minimum ON Time range is 0 to 300 seconds.
0 5. Press or to select the minimum time that the output relay remains On after reaching the
1
Relay ON value, then press to save your selection and go to the Minimum Relay OFF Time
ONT Selection screen.
Screen example shows an ONT value of 0 (seconds) selected for Output 1.
Minimum Relay OFF Time Selection Screen: Minimum OFF Time range is 0 to 300 seconds.
6. Press or to select the minimum time that this output relay remains Off after reaching the
120 Relay OFF value. Press to save your selection and go to the Sensor Failure Mode Selection
OFFT1 screen.
The screen example shows an OFFT value of 120 (seconds) selected for Output 1.
Sensor Failure Mode Selection Screen: Select the output’s mode of operation if a referenced sensor or
sensor wiring fails. If the output references functional sensors HI-2 or HI-3, the output enters the Sensor
OFF Failure mode whenever a referenced sensor or sensor wiring fails. The output operates in the selected
SNF1 Sensor Failure mode until the failure is remedied. Sensor Failure mode selections for Relay Outputs
include:
• ON = Output relay remains On during sensor failure.
• OFF = Output relay remains Off during sensor failure.
7. Press or to select this output’s mode of operation if the sensor or sensor wiring fails.
Press to save your sensor failure mode selection and go to the Edit Sensor screen.
The screen example shows OFF selected as the Sensor Failure mode for Output 1.
Edit Sensor Screen: This screen displays the sensor that this output currently references. Typically, no
action is taken in this screen. But if you need to change the sensor that this output references, yo

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