System 350 A350P Electronic Proportional Plus Integral Temperature Control

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Група обладнання	A350P Temperature Control with Analog Output
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FANs 930, 930.5, 125, 121
Product/Technical Bulletin A350P
Issue Date 0414

System 350TM A350P Electronic Proportional Plus Integral
Temperature Control

The A350P is an electronic, proportional plus integral
temperature control with analog 0 to 10 VDC and
0 to 20 mA outputs. The control is equipped with
three user-selectable time integration constants and
an adjustable throttling range of 2 to 30F° (1 to 17C°).
Two models cover a setpoint range of -30 to 130°F
(-35 to 55°C) and 90 to 250°F (32 to 121°C).

As are all System 350™ products, the A350P control
is housed in a NEMA 1, high-impact plastic enclosure.
The modular design provides easy, plug-together Figure 1: A350P Electronic Proportional Plus
connections for quick installation and future Integral Temperature Control
expandability.

Features and Benefits
 Modular Design Enables stage, display, and power modules to
be purchased and installed as needed

 Plug-Together Connectors Eliminates wiring between modules, which
and 35 mm DIN Rail reduces installation costs
Mounting

 Two Models Cover a Wide Reduces inventory by encompassing
Setpoint Range of -30 to temperature ranges required to support the
250°F (-35 to 121°C) majority of Heating, Ventilation, Air Conditioning,
and Refrigeration (HVAC/R) applications

 Minimum Output Adjustable Tailors the output to the requirements of the
from 0 to 60% controlled device; can be used to set minimum
valve or damper position

 Adjustable Throttling Enables the user to tune the system for optimum
Range of 2 to 30F° (1 to 17C°) stable performance

 Field-selectable Reverse Works in heating or cooling applications
or Direct Acting Mode

 Three User-Selectable Provides selection of the integration constant for
Integration Time Constants applications requiring proportional plus integral
control

 Interchangeable Increase versatility and serviceability
Temperature Sensors

© 2014 Johnson Controls, Inc. 1
Part No. 24-7664-192, Rev. G www.johnsoncontrols.com
Code No. LIT-930020
A pplication O peration
The A350P Temperature Control can be used as a The A350P control operates on 24 VAC/VDC and
standalone device or in conjunction with plug-together provides two simultaneous analog outputs:
accessory modules. The addition of S350 Stage 0 to 10 VDC and 0 to 20 mA. A cover-mounted,
Modules allows for the control of multiple stage 10-segment Light-Emitting Diode (LED) bar graph
HVAC/R applications. Typical application for the indicates percentage of output.
A350P includes:
Features include:
• proportional heating control with staged direct
• adjustable setpoint
expansion cooling
• adjustable minimum output
• simple temperature control for air handling units
• adjustable throttling range (proportional band)
• modulating damper actuators for mixed air control
• selectable integration time constant
• simple proportional mixed air control
A typical System 350 Temperature Control setup • selectable Reverse Acting (RA) or Direct Acting
includes the following: (DA) mode of operation

• A350P Temperature Control IMPORTANT: All System 350 controls are
designed for use only as
• A99B Series Temperature Sensor operating controls. Where an
• Y350R Power Module (or 24 VAC Class 2 operating control failure would
transformer) result in personal injury and/or
loss of property, it is the
• S350 Stage Modules responsibility of the installer to
add devices (safety, limit controls)
• D350 Digital Temperature Display Module
or systems (alarm, supervisory
systems) that protect against, or
warn of, control failure.

Integration
Cover Screw Module DIP Switch
(One of Four) Connector
Fast

1 2 3 4
Medium
Slow
Setpoint Off
On
Dial

Throttling Range
Potentiometer THROT MIN Integration DIP switch is
RANGE OUTPUT
shown in proportional-only position.
Minimum Output
Potentiometer

Reverse
Acting (RA)
LED Indicator V
I
SN
VDC Direct
(Percent of Output) C
24V
Acting (DA)

Operation Mode
Jumper Positions

V: 0-10 VDC Output 24V: 24 VAC (+)
I: 0-20 mA Output C: Common (-)
SN: Sensor Input VDC: +5 VDC (not used)

Figure 2: Interior View Showing A350P Control’s Features

2 System 350 A350P Electronic Proportional Plus Integral Temperature Control Product/Technical Bulletin
Minimum Output Adjustment Throttling Range (Proportional Band)
The minimum output adjustment sets the minimum The throttling range is the range over which a control
voltage or milliampere output provided by the A350P is active. Throttling range for the A350P control can be
control. It can be adjusted from 0 to 60% (0 to 6 VDC adjusted from 2 to 30F° (1 to 17C°). Make the
or 0 to 12 mA) of the output range. adjustment at the throttling range potentiometer
marked THROT RANGE (see Figure 2).
Example:
A controlled device responding to a 4-20 mA output
would require the minimum output to be adjusted to Integration Function
20% or 4 mA. (See Figure 3.) The minimum output Proportional-only controls cannot hold a process at the
adjustment may also be used to set valves or dampers exact setpoint. A proportional offset is always present
to minimum positions. because the control output is 0% at setpoint. Any load
0% on the system will cause the control point to be offset
20% from the setpoint. The greater the load on the system,
20 50% the further the control point will be offset from the
setpoint. (This is commonly referred to as proportional
offset, and under maximum load this error will
Output 10 approach the throttling range.)
(mA)
4 Throttling Range Some proportional-only controls are designed with
0 their setpoint located midway through the proportional
2 4 6 8 10 12 14 16 18 20 band to help compensate for this offset. This results in
0
a plus/minus error from the setpoint rather than a
Deviation Above Setpoint (F°) single-ended error. Refer to Figure 4.

Figure 3: Output vs. Deviation from
Setpoint for: Minimum Output = 0, 20, and
50%, Throttling Range = 20°F (DA)

Make the adjustment at the minimum output
potentiometer marked as MIN OUTPUT.
(See Figure 2.) For each 10% increase in output, the
next bar on the LED indicator will light (only one bar is
lit at any time).
Note: Before setting the minimum output
potentiometer, verify that the control reads
zero output (that is, no LEDs are lit).

System 350 A350P Electronic Proportional Plus Integral Temperature Control Product/Technical Bulletin 3
Proportional Only Control
Temperature

System Load
Proportional
Offset Throttling
Load Change
Range
Control Point
Follows the Load
Setpoint

Time

Proportional Plus Integral Control
Temperature System Load

Proportional Load Change
Integration adjusts the
Offset = 0
proportional output to
bring the process to
Setpoint
setpoint regardless of load.

Time

Figure 4: Comparison Between Proportional Only and Proportional Plus Integral Control

The A350P control has an integration feature that The A350P control has three field-selectable
forces the control point to match the setpoint. Over integration constants and an off position. The
time, the A350P will control the heating/cooling integration DIP switch selects the integration constant.
equipment to balance the system load at the control (See Figure 2 for location.)
setpoint. (See Figure 4.)
The field-selectable integration constants include:
On traditional proportional plus integral controls, the
amount of correction will become too large if the • OFF: Switch 1 to On position, all others Off
system load exceeds the capacity of the equipment. provides proportional-only operation.
When the actuated device (valve or damper) is fully Note: In open-loop (without feedback) applications,
open or closed and the setpoint still cannot be select OFF (proportional-only) operation.
reached, the integration error continues to grow. The
result is called integral windup. • Slow (C3): Switch 2 to On position, all others
Off is the slowest integration constant (26 minute),
The A350P control avoids integral windup with a and is suitable for most proportional plus integral
patented circuit that puts a dynamic ceiling on the applications. Slow is the recommended initial
integrator. This resets the integration error when the setting.
sensor goes just above the setpoint plus the throttling
range (in DA mode) or just below the setpoint minus • Medium (C2): Switch 3 to On position, all
the throttling range (in RA mode). This allows the others Off selects a 13-minute integration
process to recover from an out-of-range condition constant. If the rate of system recovery to setpoint
without a large overshoot. is sluggish with the control set to slow, and if the
system has enough capacity to drive the process
to setpoint at a faster rate, the medium setting
may be used.
• Fast (C1): Switch 4 in On position, all
others Off is the fastest integration constant
(6.5 minutes). Use fast only in instances where the
rate of change at the sensor is extremely rapid
and system capacity can compensate for that
rapid change.

4 System 350 A350P Electronic Proportional Plus Integral Temperature Control Product/Technical Bulletin
Reverse or Direct Acting Operation
With the operation jumpers in the Reverse Acting (RA) S350A On-Off Stage Modules
position, the analog output increases as the
temperature drops below setpoint. (See Figure 5.) S350A On-Off stage modules receive power, setpoint,
and sensor input from the A350P control. S350A stage
With the operation jumpers in the Direct Acting (DA) modules perform switching functions based on the
position, the analog output will increase as the control’s setpoint and sensor information, as well as
temperature rises above the setpoint. the offset and differential selected at the S350A stage
module.
Select the RA/DA mode by positioning the operation
jumpers vertically or horizontally. (See Figure 2.) For more information on these modules, refer to the
Position the operation jumpers vertically for RA and System 350TM S350 Temperature, S351 Humidity,
horizontally for DA. and S352 Pressure On/Off Stage Modules
Product/Technical Bulletin (LIT-930080).
The RA/DA operation jumpers are installed in the RA
mode at the factory.
S350C Slave Stage Module
Note: Dashed areas show throttling range possibilities
from minimum to maximum. S350C slave stage modules receive power and sensor
Reverse Acting Direct Acting
input from the A350P control. S350C slave stage
10 20 20 10 modules perform switching functions based upon the
VDC mA mA VDC control’s sensor information, as well as the setpoint
RA DA and differential selected at the S350C stage module.
10 10
For more information on these modules, refer to the
-
0 0 0 0
+ System 350TM S350C Temperature Slave Stage
30 25 20 15 10 5F° 5 10 15 20 25 30F° Module Product/Technical Bulletin (LIT-930084).
Setpoint Setpoint
Throttling Range Throttling Range
S350P Proportional Stage Modules
Figure 5: RA and DA Proportional Bands Shown in S350P proportional stage modules receive power,
Proportional-Only Mode setpoint, and sensor input from the A350P control. The
S350P stage module responds with an analog 0 to
A dd-on Modules 10 VDC and 0 to 20 mA output signal. This is based
upon the control’s setpoint and sensor information, as
well as the offset, throttling range, and minimum output
The maximum number of add-on modules is listed in
selected at the S350P stage module.
Table 1.
For more information on these modules, refer to the
TM
Table 1: Maximum Number of S350 Stage System 350 S350P Proportional Plus Integral
Modules per A350P Temperature Stage Module Product/Technical Bulletin
(LIT-930086).
Power Number Number of Number of
Source of S350A S350A or S350A or
or S350C S350C S350C
Stage Modules Modules
Modules (with (with
Allowed One S350P) Two S350Ps)
Allowed Allowed
Y350R 4 2 0
External 9 8 7
Class 2
Transformer

System 350 A350P Electronic Proportional Plus Integral Temperature Control Product/Technical Bulletin 5
D imensions
Mounting Slots 3/16 (4)
for No. 6 Screws

1/2 (13)

5 (127)
2 15/16 A350P
(75)
4 (102)

1 9/16 DIN 2 3/8 (61)
(40) 7/16 (11) Rail Mount

1 3/16 (31)

Sensor 3 (76)
1/4 (6) 2 3/8 (61)

9 3/4 (248) 2 (50)
7/8 (22) Conduit 7/8
Hole (22)

Figure 6: A350P Control and Sensor Dimensions, in. (mm)

I nstallation and Wiring
Note: When mounting any System 350 module to
Celsius Scale Conversion rigid conduit, attach the hub to the conduit
A Celsius scale throttling range decal is included with before securing the hub to the control
the A350P control. If the Celsius scale is desired: enclosure.

1. Locate the throttling range and minimum output
potentiometers on the main PC board.
(See Figure 2.) Carefully remove the knobs and ! WARNING: Risk of Electrical Shock.
the existing decal. Disconnect the power supply before making
electrical connections. Contact with components
2. Apply the Celsius scale decal in the same place as
carrying hazardous voltage can cause electric shock
the original decal.
and may result in severe personal injury or death.
3. Rotate both knob stems completely
counterclockwise (CCW).
AVERTISSEMENT: Risque de décharge
4. Reinstall the potentiometer knobs so the arrows électrique.
point to the minimum values. Débrancher l'alimentation avant de réaliser tout
branchement électrique. Tout contact avec des
The A350P Temperature Control is housed in a
composants conducteurs de tensions dangereuses
compact NEMA 1 plastic enclosure designed for
risque d'entraîner une décharge électrique et de
standard 35 mm DIN rail mounting. Four key-slot provoquer des blessures graves, voire mortelles.
mounting holes on the back of the control case are
provided should surface mounting be required. If a
Y350R is used, it should be mounted immediately to
the right of the control. Any S350 modules would
follow on the right, with the D350 being the last module
mounted, also on the right.

6 System 350 A350P Electronic Proportional Plus Integral Temperature Control Product/Technical Bulletin
Wiring Terminals Sensor Connection
Install all wiring to conform to the National Electrical Shielded cable is not generally required for sensor
Code and local regulations. For maximum electrical wiring on runs of less than 50 feet. When using
rating of control, refer to the label inside the control shielded cable, isolate and tape the shield at the
cover. Terminals will accept 12 to 26 AWG wire. Use sensor. Connect the shield to Terminal C on the
only copper conductors. A350P control.
1. Use a 1/8 in. (3 mm) flat-blade screwdriver to push Refer to Table 3 for the maximum recommended cable
the clamp arm down. lengths for particular sizes of wire.
2. Insert the appropriate wire into the opening. Table 3: Maximum Recommended
Refer to Table 2 for terminal designations. Sensor Cable Lengths
3. Release the clamp arm to secure the wire.
Wire Shielded Cable Length
See Figure 7.
Gauge Feet Meters
14 AWG 800 244
16 AWG 500 152
18 AWG 310 94
20 AWG 200 61
22 AWG 124 38

• Various A99B Series Temperature Sensors and
mounting hardware are available for use with
V I SN VDC A350P Series controls.

Figure 7: Cage Clamp Terminal Block The sensor must be connected to Terminals SN
and C. (See Figure 2.) The sensors are not
polarity sensitive.
Table 2: Terminal Designations
• The sensor must be mounted so that it can
Terminal Description accurately sense the temperature of the controlled
V 0 to 10 VDC output medium.
I 0 to 20 mA output Table 4: A350P Controls And Sensors
SN Temperature sensor input
Control Sensor Included
VDC 5 VDC power supply (not used)
Sensor Lead Length is 9-3/4 in.
C Common for power supply, (0.25 m)
temperature sensor, and outputs
A350PS-1C A99BB-25C; Range: -40 to 212°F
24V 24 Volts AC (-40 to 100°C)
Note: Output signals from the A350P control vary A350PS-1CM A99BB-25C; Range: -40 to 212°F
from 0 to 10 VDC and 0 to 20 mA. (Both (-40 to 100°C)
outputs can be used simultaneously.) A350PS-2C A99BC-25; Range: -40 to 248°F
Connections can be made to both the V and (-40 to 120°C)
I terminals, allowing the control to drive
two outputs from the same RA or DA ramp A350PS-2CM A99BC-25; Range: -40 to 248°F
simultaneously. This feature can be used to (-40 to 120°C)
drive motor actuators of different types in a A350PT-1C No Sensor Included
single application. A350BA-2C A99BC-25; Range: -40 to 248°F
(-40 to 120°C)
• For more information regarding sensor options
and installation, refer to the A99B Series
Temperature Sensors Product/Technical Bulletin
(LIT-125186).
System 350 A350P Electronic Proportional Plus Integral Temperature Control Product/Technical Bulletin 7
A djustments
Follow this procedure to set up the A350P control for 5. Make sure the system is stable in the proportional
the types of operation desired. mode before selecting integration. Refer to the
Checkout Procedure section.
1. Remove its cover by loosening the four captive
cover screws. (See Figure 2.) 6. Reinstall the cover and secure in place with the
four captive cover screws.
2. Set the RA/DA operation jumpers to the desired
mode of operation. Position the operation jumpers 7. Adjust the setpoint dial to the desired setpoint.
vertically for RA (Reverse Acting) or horizontally
If using the D350 Display Module, press and hold
for DA (Direct Acting). (See Figure 2.)
the setpoint button on the D350 while rotating the
3. Adjust the throttling range potentiometer to desired setpoint dial.
setting. Rotate Clockwise (CW) to increase the
Note: The control’s setpoint is factory calibrated at
throttling range.
midscale to a tolerance of ±1F° (0.6C°). The
Notes: Included with the control is a Celsius scale setpoint tolerance at the extreme ends of the
throttling range decal. If the Celsius scale is setpoint scale may be ± 4F° (2.2C°). The
desired, refer to the Celsius Scale Conversion D350 Display Module is unaffected by this
section for decal installation instructions. tolerance shift. Use the D350 for the most
accurate setpoint selection.
If the A350P is to be used in proportional plus
integral control, the initial throttling range
adjustment is seldom set below 6F° (3C°). C heckout Procedure
A narrow proportional band used in Follow this procedure to verify the A350P control is
conjunction with the integration may result in connected and functioning properly.
unstable control.
1. Before applying power, make sure that the
4. If minimum output is required, set the minimum installation and wiring connections are according
output potentiometer (see Figure 2) to the desired to job specifications.
position. The 10-segment front LED panel or a
voltmeter can be used to read the minimum 2. Set up the system for proportional mode
output. (The minimum setting for the control is (Integration = OFF), and make any necessary
designated by the 0 on the decal.) adjustments to the setpoint, throttling range, and
minimum output. Then select Reverse or Direct
Notes: Before adjusting the minimum output Acting mode.
potentiometer, verify that the control reads
zero output (that is, no LEDs are lit). 3. After making adjustments and electrical
connections, apply power to the system, and
For each 10% increase in output, the next observe it for stable operation.
bar will light on the LED bar graph (only
one bar is lit at anytime). In a milliampere 4. If integration is required, select the fast (C1),
application, each bar equals 2 mA. In a medium (C2), or slow (C3) integration constant.
voltage application, each bar equals 1 VDC. Slow is the recommended initial setting. (Refer to
(Refer to Figure 3.) the Integration Function section.)
Example: 5. Put the system back into operation. If instability
occurs, consider increasing the throttling range.
To set the control for a minimum output of
4 mA, turn the minimum output potentiometer
clockwise until the second LED segment just
lights.
T roubleshooting
If the control system does not function properly, verify a. Connect a digital voltmeter (DVM) between
that the proper operation mode is selected on each Terminals 24V (+) and C (-) located on the
module (DA or RA), and perform the following A350P’s terminal block. (See Figure 2.)
procedures to determine the cause of the problem:
If an external transformer is used, select AC
1. Check for proper voltages on the A350P control. volts on the DVM. Verify that the voltage is
between 20 and 30 VAC.

8 System 350 A350P Electronic Proportional Plus Integral Temperature Control Product/Technical Bulletin
If a Y350R Power Module is used, select DC 2. Check sensor for proper resistance at a given
volts on the DVM. Verify that the voltage is temperature. (The resistance across the sensor
between 16 and 38 VDC. changes with the temperature of the sensor.)
If an external DC power supply is used, select a. Disconnect power from the A350P control.
DC volts on the DVM. Verify that the voltage is
b. Disconnect the sensor from the control and
between 22 and 29 VDC.
measure the resistance across sensor leads.
b. If the DVM reading is within the indicated
c. When measuring the sensor’s resistance, use
voltage range, select DC volts on the DVM
an accurate thermometer to measure the
(DVM must be accurate to +/-0.01 VDC), and
temperature at the sensor.
connect the (+) lead to Terminal VDC and the
(-) lead to Terminal C. d. Refer to Figure 8 to determine the optimal
resistance for the measured temperature.
If the DVM voltage is between 4.9 and
5.1 VDC, proceed to Step 2. e. If the measured resistance varies substantially
from the optimal resistance for that
If the DVM voltage is above 5.1 VDC, replace
temperature, the sensor or wiring must be
the A350P.
replaced.
c. If the DVM voltage is below 4.9 VDC, check
f. If the sensor’s resistance conforms to the
the control using the following procedure.
chart in Figure 8, reconnect the sensor to the
Disconnect all loads from the A350P control. control.
(If in Direct Acting mode with power on, the
g. Reconnect power to the control.
system will go to full output when the sensor is
disconnected. Thus, ensure that any loads are Note: The sensor reading indicated by the D350
disconnected before disconnecting the may differ somewhat from thermometer
temperature sensor.) readings due to sensor tolerances, time
constants, thermometer accuracy, and other
Disconnect the temperature sensor
factors.
completely, and recheck the DVM voltage.
If the DVM voltage rises to a value between °F Temperature °C
4.9 and 5.1 VDC, replace the sensor. 260
120
240
If the DVM voltage is still below 4.9 VDC, 220 100
200
replace the A350P control. 180 80
160
140 60
120
100 40
80
60 20
40 0
20
0 -20
-20
-40 -40
500 700 900 1100 1300 1500 1700 1900 2100
Resistance (Ohms)
Figure 8: Temperature vs. Resistance Chart for the
A99B Series Sensor

System 350 A350P Electronic Proportional Plus Integral Temperature Control Product/Technical Bulletin 9
3. Check the A350P control for proper operation. g. If the sensor voltage is above 1.1 VDC
on A350PS-1C or above 1.6 VDC on
Note: Perform Steps 1 and 2 first.
A350PS-2C, adjust the setpoint to match the
a. Reconnect the sensor to the control and actual temperature (Ts). The output Terminal
re-apply power. V should be less than 0.1 VDC, and all LEDs
b. Turn the throttling range and the minimum in the bar graph should be off.
output to minimum by turning both Note: Some tolerance error is present between the
potentiometers counterclockwise. setpoint scale and the setpoint knob pointer.
c. Switch off the integration. Refer to the Adjustments section.

d. Select the RA mode. 1. Make sure the A350P control is in RA
mode.
e. Connect the DVM (+) lead to the A350P
control’s Terminal SN and the (-) lead to 2. Increase the setpoint in increments of 2F°
Terminal C. (1C°).
If the sensor voltage is less than 1.8 VDC on 3. As the setpoint is increased, the control’s
model A350PS-1C or less than 2.3 VDC on Terminal V output voltage should go from
model A350PS-2C, go to Step 3g. 0 to 10 VDC, the Terminal I output current
should go from 0 to 20 mA, and the LEDs
f. If the voltage is greater than 1.8 VDC on should turn on, one at a time from left to
model A350PS 1C or greater than 2.3 VDC on right.
model A350PS-2C, adjust the setpoint to
120°F (49°C) on model A350PS-1C or 240°F 4. If the LEDs do not turn on and if the
(116°C) on model A350PS-2C. outputs of terminals V and I do not change
as described above, replace the control.
The output Terminal V should be less than
0.1 VDC, and all LEDs in the bar graph display h. Readjust the A350P control to the desired
should be off. If not, replace the A350P. control settings.
1. Adjust the minimum output to the
maximum by turning the potentiometer
R epairs and Replacement
CW. As the potentiometer is turned CW, Do not make field repairs or perform calibration.
the LEDs in the bar graph should turn on A99B Temperature Sensors and replacement controls
from left to right until the fifth or sixth bar is are available through the nearest Johnson Controls
on. If not, replace the A350P control. representative. (See Tables 5 and 6 for ordering
2. Adjust the minimum output to zero again, information.)
and select the DA mode.
3. If the right most LED in the bar graph is on
(Terminal V = 10 VDC, Terminal I = 20 mA),
go to Step 3h. If the LED is not on, replace
the A350P.

10 System 350 A350P Electronic Proportional Plus Integral Temperature Control Product/Technical Bulletin
O rdering Information
Table 5: System 350 Products
Item Product Code Number Description
A350P Proportional Plus Integral A350PS-1C Range: -30 to 130°F (-35 to 55°C)
Temperature Controls Throttling Range: 2 to 30 F° (1 to 17C°)
(Includes the A99BC-25C Temperature Sensor)

A350PS-2C Range: 90 to 250°F (30 to 120°C)
Throttling Range: 2 to 30 F° (1 to 17C°)
(Includes the A99BC-25C Temperature Sensor)

A350PT-1C Range: -30 to 130°F (-35 to 55°C)
Throttling Range: 2 to 30F° (1 to 17C°)
(Sensor not included)
Display Modules D350AA-1C Digital Temperature Display Module (Fahrenheit Scale)
D350BA-1C Digital Temperature Display Module (Celsius Scale)
On/Off Stage Modules S350AA-1C Fahrenheit Scale
S350AB-1C Celsius Scale
Slave Stage Module S350CC-1C Dual Scale (°F and °C)
Proportional Stage Module S350PQ-1C Dual Scale (°F and °C)
Power Module Y350R-1C 120 or 240 VAC, 50/60 Hz Input, Rectified Class 2,
24 VAC Output

Table 6: System 350 Accessories
Item Product Code Number Description
Wall Mount Plate TE-6001-4 Includes sensor mounting clip
Cover T-4000-2644 For wall mount plate
Mounting Clip A99-CLP-1 Surface mounting clip for the A99B Temperature Sensor
Duct Mounting TE-6001-1 Duct-mounting hardware with handy box
Duct Mounting TE-6001-11 Duct-mounting hardware without handy box
Conduit Adaptor ADP11A-600R 1/2 in. snap-fit EMT conduit adaptor (box of 10)
Immersion Well WEL11A-601R For liquid sensing applications
Sun Shield SHL10A-603R For use with outside sensors in sunny locations
DIN Rail Sections BKT287-1R 12 in. (0.3 m) long
BKT287-2R 39-1/3 in. (1.0 m) long
DIN Rail End Clamp PLT344-1R Consists of two end clamps
Cables for Remote Mounting of WHA29A-600R* 3 ft (0.9 m)
D350 Display Module WHA29A-603R 25 ft (7.6 m)
WHA29A-604R 50 ft (15.2 m)
*WHA29A-600R may be used to daisy chain S350 modules together.

System 350 A350P Electronic Proportional Plus Integral Temperature Control Product/Technical Bulletin 11
Specifications
Product A350P Proportional Plus Time Integral Temperature Control
Supply Voltage Y350R Power Module: Input: 120/240 VAC 50/60 Hz
Output: 24 VDC, unfiltered, 10 VA
External Source: 24 VAC, 50/60 Hz, Class 2 (20-30 VAC)
Note: Only one supply voltage source may be used.
Power Consumption 3.2 VA maximum
Ambient Temperature Operating: -30 to 150°F (-34 to 66°C)
Shipping: -40 to 185°F (-40 to 85°C)
Humidity (all modules) 0 to 95% RH non-condensing; maximum dew point 85°F (29°C)
Setpoint Adjustment Range A350PS-1C: -30 to 130°F (-35 to 55°C)
A350PS-2C: 90 to 250°F (30 to 120°C)
A350PT-1C: -30 to 130°F (-35 to 55°C)
Throttling Adjustment 2 to 30F° (1 to 17C°)
Range
Analog Outputs 0 to 10 VDC (550 ohm load minimum) and 0 to 20 mA (600 ohm load maximum)
Minimum Output Adjustable from 0 to 60% of the output
Output Indication A ten segment LED bar graph indicates percentage of output.
Control Action Direct or reverse action is jumper selectable.
Integration Constant Four selectable rates: fast, medium, slow, and off
Sensor Replaceable positive temperature coefficient sensor
Reference resistance 1035 ohms at 77°F (25°C)
Material Case and cover: NEMA 1 high-impact thermoplastic
Agency Listing UL Listed, CCN XAPX, File E27734
UL Listed for Canada, CCN XAPX7, File E27734
The performance specifications are nominal and conform to acceptable industry standards. For application at conditions beyond these specifications,
consult Johnson Controls Application Engineering at (414) 274-5535. Johnson Controls, Inc. shall not be liable for damages resulting from misapplication
or misuse of its products.

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12 System 350 A350P Electronic Proportional Plus Integral Temperature Control Product/Technical Bulletin

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