System 450 Series Control Modules with Relay Outputs Installation Guide (C450CBN-1, C450CCN-1)

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System 450™ Series Control Modules with Relay Outputs
Installation Instructions
C450CBN-1 Part No. 24-7664-2675, Rev. G
C450CCN-1 Issued April 27, 2010
Supersedes December 21, 2009

Application 13 11
(1/2) (7/16) 40
(1-9/16)
IMPORTANT: Use this System 450 Series Control
Module with Relay Output only as an operating
4
control. Where failure or malfunction of the System (3/16)
450 control module could lead to personal injury or 75 Screw
127 DIN Rail (2-15/16)
property damage to the controlled equipment or Clips Slots
(5)
(Four)
other property, additional precautions must be
designed into the control system. Incorporate and
maintain other devices, such as supervisory or
alarm systems or safety or limit controls, intended to
warn of or protect against failure or malfunction of 61 61
the System 450 control module. (2-3/8) (2-3/8)
1/2 in. Nominal
System 450 is a family of modular, digital electronic

FIG:sys450_dims
Trade Size
controls that is easily assembled and set up to provide Conduit Hole
22
reliable temperature, pressure, and humidity control for (7/8)
a wide variety of Heating, Air Conditioning, Ventilation,
and Refrigeration (HVACR) and commercial/industrial Figure 1: System 450 Module Dimensions, mm (in.)
process applications.
Installation
The System 450 control modules allow you to
configure custom application-specific control systems Location Considerations
with up to three input sensors and ten (relay and/or Observe the following System 450 location guidelines:
analog) outputs, including control systems that can
monitor and control temperature, pressure, and • Ensure that the mounting surface can support the
humidity applications simultaneously. module assembly, mounting hardware, and any
(user-supplied) panel or enclosure.
You can easily install and quickly configure a
stand-alone System 450 control module and sensor in • Mount the modules upright and plugged together in
the field as a replacement control for almost any a horizontal row where possible (Figure 3). DIN rail
temperature, pressure, and humidity control. mounting is highly recommended.

C450CxN-1 models are Single-Pole, Double-Throw • Mount modules on flat even surfaces.
(SPDT) relay control modules with Liquid Crystal • Allow sufficient space for wires and connections.
Display (LCD) and four-button touch pad User Interface
(UI) that allows you to set up a System 450 control • Mount the modules in locations free of corrosive
system. C450CBN-1 models provide one SPDT relay, vapors and observe the ambient operating
C450CCN-1 models provide two SPDT relays. conditions in the Technical Specifications.

Refer to the System 450 Series Technical Bulletin • Do not mount the modules on surfaces that are
(LIT-12011459) for more detailed information on prone to vibration or in locations where radio
designing, installing, setting up, and troubleshooting frequency or electromagnetic emissions may
System 450 Series control systems. The System 450 cause interference.
technical bulletin can be accessed and downloaded on • Do not install the modules in airtight enclosures.
the Johnson Controls® Online Product Literature Web
site at the following Web address: • Do not install heat-generating devices in an
http://cgproducts.johnsoncontrols.com/default.aspx enclosure with the modules that may cause the
temperature to exceed the ambient operating limit.

System 450™ Series Control Modules with Relay Outputs Installation Instructions 1
Mounting IMPORTANT: Use copper conductors only. Make
Mount System 450 modules on 35 mm DIN rail all wiring in accordance with local, national, and
(recommended) or directly to an even wall surface. To regional regulations.
mount modules on DIN rail:
1. Provide a section of 35 mm DIN rail that is longer IMPORTANT: Do not exceed the System 450
than the module assembly width, and mount the module electrical ratings. Exceeding module
DIN rail horizontally in a suitable location using electrical ratings can result in permanent damage to
appropriate mounting hardware/fasteners. the modules and void any warranty.
2. Clip the control module on the rail, position the
upper DIN rail clips on the top rail, and gently snap IMPORTANT: Do not connect 24 VAC supply
the lower clips onto the rail. power to the System 450 modules before finishing
wiring and checking all wiring connections. Short
3. Clip the remaining power and/or expansion circuits or improperly connected wires can result in
modules to the right of the control module on to the damage to the modules and void any warranty.
DIN rail and plug the 6-pin module connectors
together (Figure 3). IMPORTANT: Run all low-voltage wiring and
Note: If your System 450 control system uses a cables separate from all high-voltage wiring.
power module, the power module must be plugged Shielded cable is strongly recommended for input
into the right-hand side of the control module. (sensor) and analog output cables that are exposed
to high electromagnetic or radio frequency noise.
To direct-mount modules to wall surfaces:
1. Plug the modules together, remove the module
covers, place the assembly against wall surface
horizontally in a suitable location and mark the
mount hole locations on the surface (Figure 1). Supply Power and Sn2
24V
Control Sensor Terminals C
2. Install appropriate screw fasteners, leaving screw Low Voltage (<30 V) C
Sn3
Sn1
heads approximately one to two turns away from 5V
C
flush to the surface.
Common terminals (C)
3. Place the assembly over screw heads on the are internally
connected.
mounting slots, and carefully tighten the mounting
screws.
6-Pin Module
Note: If you mount the modules on an uneven Connector
surface, do not damage the housings when
tightening mounting screws. Use shims/washers to
Some models have a
mount module assembly evenly on the surface. second output relay and
terminal block labeled
Refer to the control sensor installation instructions for LNC2, LNO2, and LC2.
Internal
information on locating and mounting control sensors. SPDT Relay
Normally Closed/Off
Wiring Position
See Figure 2 and Table 1 for electrical termination

FIG:sys450_rly_cntrl_wir
locations and wiring information. See Technical Dry-Contact, Line-Voltage
Specifications on page 12 for electrical ratings. Relay Output Terminals
(See Technical Specifications
LNC1 LNO1
for Electrical Ratings.)
WARNING: Risk of Electric Shock. LC1
Disconnect or isolate all power supplies
! before making electrical connections.
Note: The relay output terminals connect to an internal SPDT
relay and do not supply any power to the application.
More than one disconnect or isolation
may be required to completely Figure 2: C450CxN-1 Wiring Terminals Terminals
de-energize equipment. Contact with
components carrying hazardous voltage
can cause electric shock and may result
in severe personal injury or death.

2 System 450™ Series Control Modules with Relay Outputs Installation Instructions
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

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 Close (NC) contact on the SPDT relay. 0.08 mm2 to 2.5 mm2
LNO1, LNO2 Connects control circuit to the Normally Open (NO) 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 3
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

100
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 OSP4 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 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/Default 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/Default (Sensor screens. In a setup screen, press to save
Status) screen, press and hold both and the (flashing) Setup Value and go to the
for 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

Setup and Adjustments You can now set up your control system in the
System 450 reset control module UI.
System 450 Component Requirements
A System 450 control system consists of one control Note: After you power on your module assembly, you
module, one to three control sensor inputs, and one to can set up your control system in the control module UI
ten outputs that provide On/Off control and/or analog before wiring the sensors or outputs to your assembly.
control. Figure 3 shows an example System 450 Setting Active/Passive Sensor Jumpers
module assembly with two input sensors and three
Before putting your System 450 reset control system
outputs (two relay outputs and one analog output).
into operation, you must set up each sensor in your
Setting up a System 450 Module Assembly system as either passive or active by positioning the
To set up a System 450 module assembly: jumper on the terminal pins on the terminal block
located below the sensor terminal block. See Figure 3.
1. Determine the controlled conditions, sensor types,
and value ranges required for your application, and Temperature sensors are passive (2-wire) sensors and
select the appropriate System 450 sensor types. the corresponding jumpers must be positioned across
both pins. Humidity and pressure transducers are
2. Determine the number and type (relay or analog) of active (3-wire) sensors and corresponding jumpers
outputs required to control your application, and must be positioned on one pin (or removed
select the appropriate System 450 control module completely). Figure 5 shows the jumper positions for
and expansion modules to provide the outputs. the System 450 example shown in Figure 3.
3. Assemble the control and expansion modules in Sensor 1: Jumper positioned on one pin
the proper order, starting with the control module (or removed) sets Sn-1 to Active (Pressure).
on the left.
Sensor 2: Jumper positioned across two
Note: If you use a C450YNN-1 power module, it pins sets Sn-2 to Passive (Temperature).
Sn-1
Sys450_jmprs
must be plugged into the control module. Plug in Sn-2 Sensor 3: Jumper positioned across two
any expansion modules (for your control system) to Sn-3 pins sets Sn-3 to Passive (Temperature).
the right of the power module.
Figure 5: Active/Passive Sensor Terminal Pin
4. Apply supply power to the module assembly.
Block Set up for Example in Figure 3

4 System 450™ Series Control Modules with Relay Outputs Installation Instructions
Setting up a Control System in User Interface 4. Set up the control system outputs in the UI. See
System 450 control modules have a back-lit LCD and a Setting up System 450 Outputs on page 8.
four-button touch pad UI (Figure 4) that enable you to
set up your control system. To set up a control system IMPORTANT: Do not change the module positions
in the System 450 UI: after a System 450 control system is set up in the UI.
System 450 control logic is set up in the UI according
1. Build your control system module assembly and to the Sensor Types, the output types, and the output
connect it to power. See Setting up a System 450 numbers. Changing modules or module positions in a
Module Assembly on page 4. module assembly that is already set up in the UI, can
Note: Every time a module assembly is powered change the output numbers, output types, and the
ON, the control module polls all of the modules to setup values of the assembly outputs, which requires
identify output type (relay or analog) and assigns a setting up the outputs again.
sequential output number (1 to 9 [0 = 10]) to each Use the worksheet provided on page 14 to plan and
output starting with the control module output on record the settings for your System 450 control system.
the left. The output numbers identify each output’s
setup screens in the UI. (See Figure 4.) Viewing the Main and System Status Screens
2. Access the System 450 setup screens in the UI. After you install, wire, power on, and set up your control
See Accessing the System 450 Setup Screens on system in the UI, the Main screens appear on the LCD.
page 6. During normal operation, the Main screens
automatically scroll through the current status of each
3. Set up the control system inputs in the UI. See sensor in your control system. See Table 2 for more
Setting up System 450 Sensors on page 6. information about the Main screens.
The System Status screens display the current status
of each input and output in your control system. In the
Main screen, press repeatedly to scroll through and
view all of the status screens in your control system.
See Table 2 for more information about the System
Status screens.
Table 2: System 450 Main Screens and Status Screens Information and Procedures
LCD Screen Name, Description/Function, User Action, and Example
Main (Input Status) Screen: During normal operation, the Main screen automatically scrolls through the
232 current status at each input sensor in your control system and displays the sensor number, the unit of
measurement, and the sensed condition value. See Figure 7.
PSI1 Note: Main screens are view-only; selections are not made in Main screens.
Press repeatedly to scroll through and view the System Status screens for all inputs and outputs
in your control system.
74 Press and hold and for 5 seconds to access your control system’s setup screens.
F2 Note: In any system setup 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.
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

On your control system. Relay output status screens display output number and relay status (On/Off). Analog
output status screens display output number, signal strength, and control ramp icon. See Figure 7.
OUT1 Note: System Status screens are view-only; selections are not made in Status screens.
Press repeatedly to scroll and view the System Status screens for the inputs and outputs in your
control system.
64 Screen examples show Output 1 relay is On and Output 3 signal strength is 64% of the total signal
strength. The control ramp icon in the bottom screen example indicates that the Analog Output is set up
OUT3 with SP<EP and OSP<OEP. See Setting up an Analog Output (OUTAx) for information about control ramp
icons.

System 450™ Series Control Modules with Relay Outputs Installation Instructions 5
Accessing the System 450 Setup Screens Note: The Setup Start screens are view-only;
You can access the System 450 setup screens from selections cannot be made in Setup Start screens.
the Main screen. To access the System 450 setup In any Setup Start screen, you can return to the
screens: Main screens by pressing and simultaneously.
Also, the UI returns to the Main screens after 2
1. Apply power to your module assembly. After a start minutes of inactivity in any screen in the UI.
up check, the Main screen appears on the LCD.
Setting up System 450 Sensors
2. In the Main screen, press and hold and
You must set up the input sensors for your control
simultaneously for 5 seconds to access the setup
system before you can set up any of outputs. To set up
screens and to go to the Sensor Setup Start
the input sensors you must access the setup screens.
screen.
See Accessing the System 450 Setup Screens.
Note: The Sensor Setup Start screen is the first
The Sensor Setup Start screen is the first screen
screen displayed when you access the System 450
displayed when you access the system setup screens
setup screens. From the Sensor Setup Start
in the System 450 UI.
screen, you can navigate to all of the remaining
setup screens for your control system. Table 3 provides information about System 450
sensors, Sensor Types, parameter values, and
3. Press M repeatedly to scroll through the Setup
specified sensor/transducer product code numbers.
Start screens. See Figure 7.
Table 4 provides sensor setup information, procedures,
and example screens. Figure 7 provides a System 450
UI and setup overview example. Figure 7 on page 14
provides a System 450 UI screen flowchart example.
.
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 Differential Type Number1
(Condition/Units) Range Values Value or
Proportional
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
P 05 INWC (Pressure/in. W.C.) 0 to 0.5 0.025 to 0.5 0.005 0.025 DPT2650-0R5D-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
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

1. Refer to the System 450 Series Modular Controls Product Bulletin (LIT-12011458), Catalog Page (LIT-1900549), or
Technical Bulletin (LIT-12011459) for complete ordering information for System 450 compatible sensors and transducers.

6 System 450™ Series Control Modules with Relay Outputs Installation Instructions
Table 4: System 450 Sensor Setup Information and Procedures
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 setup the input sensors before you can setup the control system outputs. The Sensor
Setup Start screen is view-only; selections are not made in Setup Start screens.
Press M (repeatedly) to scroll through the Output Setup Start screens. (See Setting up a Relay
Output (OUTRx) and Setting up an Analog Output (OUTAx) for information and procedures on setting
up outputs.)
1. Press to go to the first Sensor Type Selection screen (Sn-1) and begin setting up the
sensors in your control system.
Screen example shows the Sensors Setup Start screen with four flashing dashes.
Sensor Type Selection Screens: The Sensor Type you select for an input sensor automatically

P500 determines the setup parameters and values for each output that is set up to reference that sensor. See
Table 3 for information about System 450 sensors/transducers, Sensor Types, condition type, units of
Sn-1 measurement, minimum differential or proportional band, setup values, value ranges, and product code
numbers.
Note: For an output to operate properly, the selected Sensor Type must match the sensor/transducer

°F
model wired to the control module, and the sensor/transducer must be wired to the proper control module
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.
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
-3 your control system.
Sensor Type °F enables an offset of +/- 5°F in 1 degree increments.
OFFS2 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 Sensors Setup-Start Screen.
Screen example shows -3 (flashing) is the selected temperature offset value for Sensor 2, thus a sensed
temperature of 75°F at Sensor 2 is displayed as 72°F.
Sensors Setup Start Screen: The Sensor Setup screens return to the Sensor Setup Start screen.
-- - 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
SENS outputs. (See Setting up a Relay Output (OUTRx) and Setting up an Analog Output (OUTAx) for
more information and procedures.)
• Press and simultaneously and hold for 5 seconds to return to the Main screens.
Example shows Input Sensors Setup-Start screen with four flashing dashes.

System 450™ Series Control Modules with Relay Outputs Installation Instructions 7
Setting up System 450 Outputs 3. For Relay Outputs, see Setting up a Relay Output
After you build and connect power to your control (OUTRx) and Table 5 for setup information and
system module assembly, the output numbers and procedures.
output types for your control system are automatically For Analog Outputs, see Setting up an Analog
assigned in the UI. Output (OUTAx) and Table 7 for setup information
Note: You must set up the input sensors for your and procedures.
control system before you can set up the outputs. Setting up a Relay Output (OUTRx)
To set up System 450 outputs in the UI: A standard relay output provides On/Off control for your
application based on a fixed setpoint sensor (Sn-1,
1. Access the System 450 setup screens. (See
Sn-2, or Sn-3).
Accessing the System 450 Setup Screens.) The
Sensor Setup Start screen appears. Table 5 provides information, procedures, and screen
examples for setting up standard relay outputs.
2. At the Sensor Setup Start screen, press M
repeatedly to scroll through and select the desired
Output Setup Start screen. The Output Setup
Start screen indicates the output number and the
output type for the selected output.
Table 5: System 450 Relay Output Setup Screen Information and Procedures
LCD Screen Name, Description/Function, User Action, and Example
Relay Output Setup Start Screen: The output number and the output type (relay or analog) are
-- - automatically assigned when you connect power to the module assembly.
Note: You must set up the system’s sensors before you can set up the outputs.
OUTR1 1. Press to go to this output’s Sensor Selection screen.
Screen example shows the Relay Output Setup-Start screen for Output 1.
Sensor Selection Screen: The sensor you select here determines this output’s setup parameters and

--
values, including condition type, unit of measurement, minimum differential, default setup values, and
setup value ranges for several of the remaining output setup screens. If a sensor is not selected, the
SENS remaining output setup screens do not appear. If a sensor is already selected for this output, the Sensor
Selection screen does not appear here and the Relay ON Selection screen appears instead.
Note: You must select a sensor in this Sensor Selection screen and the selected sensor must be
Sn-2 already set up in the System 450 UI. (See Setting up System 450 Sensors.)
2. Press or to select the Sensor (Sn-1, Sn-2, or Sn-3) that this output references, then press
SENS to save your sensor selection and go to the Relay ON Selection Screen.
Screen examples show the intial Relay Output 1 Sensor Selection screen with no sensor selected,
followed by the same screen with the (Master) Sensor 1 selected for Relay Output 1.
Relay ON Selection Screen: Select the value at which the relay turns On. Relay ON is defined as relay

78
LED On/Lit, relay contacts NO to C are closed, and NC to C contacts are open.
Note: The value ranges and minimum differential are determined by the Sensor Type selected for the
ON 1 sensor that this 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.
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 NC to C are closed, and NO to C contacts are open.
Note: The value ranges and minimum differential are determined by the Sensor Type selected for the
OFF 1 sensor that this 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.
Screen example shows an OFF value of 75 (°F) selected for Relay Output 1.

8 System 450™ Series Control Modules with Relay Outputs Installation Instructions
Table 5: System 450 Relay Output Setup Screen Information and Procedures (Continued)
LCD Screen Name, Description/Function, User Action, and Example
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
Relay ON value, then press to save your selection and go to the Minimum Relay OFF Time
ONT1 Selection Screen.
Screen example shows 0 (zero) seconds selected for the minimum ON-Time for Output 1.
Minimum Relay OFF Time Selection Screen: Minimum OFF Time range is 0 to 300 seconds.

120 6. Press or to select the minimum time that this output relay remains Off after reaching the
Relay OFF value. Press to save your selection and go to the Sensor Failure Mode Selection
OFFT 1
screen.
Screen example shows 120 seconds selected for the minimum OFF-Time for Output 1.
Sensor Failure Mode Selection Screen: Select this output’s mode of operation if the referenced sensor

OFF
or sensor wiring fails. The output operates in the selected mode until the failure is remedied.
Sensor Failure mode selections for Relay Outputs include:
SNF1 • ON output relay remains On during sensor failure.
• OFF output relay remains Off during sensor failure.
7. Press or to select this output 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.
Screen example shows OFF sensor failure mode selected for Output 1. This output relay is Off if the
referenced sensor or sensor wiring fails.
Edit Sensor Screen: This screen displays the sensor that this output currently references. Typically, no

Sn-2
action is taken in this screen. But if you need to change the sensor that this output references, you
can select a different sensor for this output in this screen.
SENS Note: Changing the sensor that an output references to a sensor with a different Sensor Type changes
the default setup values for the output, and requires setting up the output again.
8. To change this output’s sensor, Press or to select the sensor that this output will
reference. After you select a different sensor for this output, press to return to the Relay ON
Selection screen (Step 3 above) and repeat the output relay setup procedure for this output
and the new Sensor Type values associated with the new sensor selection.
If you do not need to change this output’s sensor, simply press to save the current sensor
selection and return to the Relay Output Setup Start screen.
This Relay Output is now set up in the System 450 UI.
Screen example shows input Sensor 2 selected for Output 1 (Output 1 references Sensor 2).
Relay Output Setup Start Screen
-- - After you have set up this Relay Output, you can go to another Output Setup Start screen, the Sensor
Setup Start screen, or return to the Main screens.
OUTR1 9. Press M to scroll through the remaining Output Setup Start screens and return to the Sensor
Setup Start screen, or press and simultaneously and hold for 5 seconds to return to the
System 450 Main screens.
Screen example shows the Relay Output Setup-Start screen for Output 1.

Setting up an Analog Output (OUTAx) The control action between the input signal and the
An analog output provides an analog signal to control output signal can be set up four different ways,
your application based on a fixed setpoint sensor depending on the values selected for the Setpoint (SP),
(Sn-1, Sn-2, or Sn-3). End Point (EP), Percent Output Signal Strength at
Setpoint (OSP), and Percent Output Signal Strength at
Analog outputs provide an auto-selecting analog signal End Point (OEP). The LCD displays different Control
that is proportional to the sensed input condition. The Ramp icons for the four control actions.
System 450 analog output senses the impedance of
the controlled equipment’s analog input circuit and
automatically delivers either a 0–10 VDC or 4–20 mA
signal to the controlled equipment.

System 450™ Series Control Modules with Relay Outputs Installation Instructions 9
Proportional Figure 6 shows an example of the analog output setup
Band values and the resulting output signal in a typical space
100% OEP heating application (SP > EP and OSP < OEP).
SP > EP

System Output
EP SP = 70 (°F) Table 6 shows the four Control Ramp icons and the
EP = 65 (°F)
OSP < OEP
associated analog output setup value relationships.

Fig:sys450_cntrl_rmp_exmpl
SP OSP = 10 (%)
OEP = 100 (%)
10% OSP
0%
65°F 70°F
Less Condition Value Greater

Figure 6: Control Ramp Example for a Typical
Heating Application (SP > EP and OSP < OEP)

Table 6: Analog Output Control Ramp Icons
Control Ramp Control Action Set the Analog Output Value
Displayed on Relationships for the Desired Control
LCD Action and Corresponding Control
Ramp
SP < EP
OEP=100%
OSP < OEP
Output Minimum at SP
Pr
op
Ba orti
nd ona
l

OSP=0%
SP=50°F EP=60°F

SP > EP

OEP=100% OSP < OEP
Output Minimum at SP

l
na
tio
or d
op an
Pr B

OSP=0%
EP=50°F SP=60°F

SP > EP
OSP=100%
OSP > OEP
Output Maximum at SP
Pr
op
Ba orti
nd on al

OEP=0%
EP=50°F SP=60°F

SP < EP

OSP=100%
OSP > OEP
Output Maximum at SP
l
na
tio
or d
op an
Pr B

OEP=0%
SP=50°F EP=60°F

10 System 450™ Series Control Modules with Relay Outputs Installation Instructions
See Table 7 for setup information, procedures, and
screen examples for analog outputs.
Table 7: System 450 Analog Output Setup Screens Information (Part 1 of 2)
LCD Screen Name, Description/Function, User Action, Example
Analog Output Setup Start Screen: The output number and output type (relay or analog) are
-- - automatically assigned when you connect power to your control system’s module assembly.
Note: You must set up the system’s sensors before you can set up the outputs.
OUTA3 1. Press to go to this output’s Sensor Selection screen.
Screen example shows the Analog Output Setup-Start screen for Output 3.
Sensor Selection Screen: The sensor you select here determines this output’s setup parameters and

Sn-1
values, including condition type, unit of measurement, minimum proportional band, default setup values,
and setup value ranges for several of the remaining output setup screens. If a sensor is not selected here,
SENS3 this output’s remaining setup screens do not appear. If a sensor is already selected for this output, the
Sensor Selection screen does not appear here, instead the Setpoint Selection screen appears.
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.)
2. Press or to select the Sensor (Sn-1, Sn-2, or Sn-3) that this output references. Press to
save your sensor selection and go to the Setpoint Selection screen.
Screen example shows input Sensor 1 (Sn-1) selected for Output 3.
Setpoint Selection Screen: Setpoint is the target value that the controlled system drives towards and

200
along with End Point, defines this output’s proportional band.
Note: An output’s minimum proportional band (between Setpoint and End Point) is automatically
SP3 enforced in the output’s Setpoint and End Point Selection screens.
3. Press or to select this output’s Setpoint value. Press to save your Setpoint value
selection and go to the End Point Selection screen.
Screen example shows a Setpoint of 200 (psi) selected for Output 3.
End Point Selection Screen: End Point is the (condition) value that the controlled system drives away

250
from (towards Setpoint) and, along with Setpoint, defines this output’s proportional band.
Note: An output’s proportional band (between Setpoint and End Point) is automatically enforced in the
EP3 output’s Setpoint and End Point Selection screens.
4. Press or to select this output’s End Point value. Press to save your End Point value
selection and go to the %Output Signal Strength at Setpoint Selection screen.
Screen example shows a End Point of 250 (psi) selected for Output 3.
Output Signal Strength at Setpoint Selection Screen: Select the strength of the signal that this output

10
generates when the sensed condition is at the Setpoint value. The signal strength range is 0 to 100 (%).
5. Press or to select this output’s %Output Signal Strength at Setpoint value. Press to
OSP3 save your selection and go to the %Output Signal Strength at End Point Selection screen.
Screen example shows Analog Output 3 is setup to generate 10% of the total signal strength when the
input is at the Setpoint value (= 1 V or 5.6 mA).
Output Signal Strength at End Point Selection Screen: Select the strength of the signal that this output

90
generates when the sensed condition is at the End Point value. The signal strength range is
0 to 100 (%).
OEP3 6. Press or to select this output’s %Output Signal Strength at End Point value. Press to
save your selection and go to the Integration Constant Selection screen.
Screen example shows Output 3 is set up to generate 90% of the total signal strength when the input is at
the End Point value (= 9 V or 18.4 mA).
Integration Constant Selection Screen: An integration constant allows you to set up proportional plus

0
integral control for this analog output. proportional plus integral control can drive the load closer to
Setpoint than proportional only control.
I-C 3
Note: Initially, you should select the I-C value of 0 (zero) for no integration constant. Refer to the System
450 Series Technical Bulletin (LIT-12011459) for more information on proportional plus integral control
and setting an integration constant in the System 450 UI.
7. Press or to select this output’s Integration Constant for proportional plus integral control.
Press to save your selection and go to the Sensor Failure Mode Selection screen.
Screen example shows an Integration Constant of 0 (zero) selected for Output 3.

System 450™ Series Control Modules with Relay Outputs Installation Instructions

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