Installation Instructions - Johnson Controls | Product Information

Installation Instructions - Johnson Controls | Product Information
FANs 930, 930.5
Add-On Modules Section
Product/Technical Bulletin S350P
Issue Date April 8, 2014
System 350
S350P Proportional Plus Integral Temperature Stage Module
The S350P is used in conjunction with the A350
Temperature Control to add proportional or
proportional plus integral staging capability. The
S350P is an electronic control with analog 0 to 10
VDC and 0 to 20 mA outputs.
As with all System 350 products, the S350P is housed
in a NEMA 1, high-impact plastic enclosure. The
modular design provides easy, plug-in connections for
quick installation and future expandability.
Figure 1: S350P Electronic Proportional Plus Integral
Temperature Stage Module
Features and Benefits
Plug-in Connectors and
35 mm DIN Rail Mountability
Proportional or Proportional
Plus Integral Output
 Minimum Output Adjustable
from 0 to 60%
 Adjustable Throttling
Range of 2 to 30F° (1 to 17C°)
 Field-selectable Reverse
Eliminates wiring between modules and reduces
installation costs
Adds proportional or proportional plus integral
staging capability to all A350 Temperature
Controls
Tailors the output to the requirements of the
controlled device; can also be used to set
minimum valve or damper position
Enables the user to tune the system for optimum
performance
Works in heating or cooling applications
or Direct Acting Mode
 Three User-selectable
Integration Constants
 Light-Emitting Diode (LED)
Provides selection of the integration constant for
applications requiring proportional and integral
control
Aids in adjustment, tuning, and troubleshooting
Bar Graph Display of Output
© 2014 Johnson Controls, Inc.
Part No. 24-7664-1202, Rev. A
Code No. LIT-930086
1
A pplication Overview
O peration
The S350P Proportional Stage Module must be used
in conjunction with an A350 Temperature Control. The
S350P receives its power, setpoint, and sensor inputs
from the A350. The S350P adds a proportional or
proportional plus integral output to the A350 control.
The maximum number of stages that can be used in a
system varies with the type of control module (on-off,
proportional, or reset), type of stage module (on-off,
slave, or proportional), and type of power supply
(external transformer or Y350R). Use the following
table to determine the maximum number of stages that
may be used with each control module.
Table 1: Maximum S350 Stage Modules per
Control Module
Control
Maximum
S350A or
S350C
Stage
Modules
Maximum
S350A or
S350C
(with 1
S350P)
Maximum
S350A or
S350C
(with 2
S350P)
A350A,
A350B,
A350E,
A350R,
A350S
(using
Y350R)
9
6
4
A350P
(using
Y350R)
4
2
N/A
Any A350
(using
external
40 VA
transformer)
9
8
7
IMPORTANT: Use this A350P Proportional Plus
Integral Temperature Stage Module
only as an operating control. Where
failure or malfunction of the module
could lead to personal injury or
property damage to the controlled
equipment or 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 the module.
IMPORTANT: Utiliser ce A350P Proportional Plus
Integral Temperature Stage Module
uniquement en tant que dispositif de
contrôle de fonctionnement.
Lorsqu'une défaillance ou un
dysfonctionnement du module risque
de provoquer des blessures ou
d'endommager l'équipement 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, tels que des
systèmes de supervision ou d'alarme,
ou des dispositifs de sécurité ou de
limitation, ayant une fonction
d'avertissement ou de protection en
cas de défaillance ou de
dysfonctionnement du module.
The S350P is powered by the A350, and provides
two simultaneous analog outputs: 0 to 10 VDC and
0 to 20 milliamperes (mA). A cover-mounted,
ten segment LED bar graph indicates the percentage
of output currently in use. S350P features include:

adjustable offset

selectable Reverse Acting (RA) or Direct Acting
(DA) mode of operation

adjustable throttling range (proportional band)

adjustable minimum output

selectable integration constant
2 Add-On Modules—S350P Proportional Plus Integral Temperature Stage Module Product/Technical Bulletin
Cover Screws
(Quantity = 4)
Integration DIP Switch
THROT
RAN GE
Slow
Off
OFFSET
MIN
OUTP UT
Module
Connector
Medium
Fast
1 2 3 4
O
N
Reverse
Acting
LD Indicator
(Percent of Output)
Direct
Acting
V C I
Operation Mode
Jumper Positions
Figure 2: Interior View Illustrating S350P Features
Offset
The offset can be adjusted from 0 to 30F° (0 to 17C°).
The offset adjustment determines the amount of offset
between the A350’s setpoint and where the S350P’s
throttling range begins (refer to Figure 5). This
adjustment is made using the potentiometer marked
OFFSET located at the upper portion of the circuit
board (refer to Figure 2).
Mode of Operation
(Direct Acting or Reverse Acting)
When configured for Reverse Acting (RA) operation,
the analog output increases as the temperature drops
below the value of the A350’s setpoint minus the
S350P’s offset (refer to Figure 3).
When configured for Direct Acting (DA) operation, the
analog output increases as the temperature rises
above the value of the A350’s setpoint plus the
S350P’s offset (refer to Figure 3).
10
RA
10
VDC
DA
5
5
0
0
30 25 20 15 10 5
Throttling Range
A350
Setpoint Minus
S350P Offset
5 10 15 20 25 30
Throttling Range
A350
Setpoint Plus
S350P Offset
Figure 3: Direct or Reverse Acting Proportional
Bands Shown in “Proportional Only” Mode
(Shaded Area Shows Throttling Range Possibilities
from Minimum to Maximum)
Throttling Range (Proportional Band)
The throttling range can be adjusted from
2 to 30F° (1 to 17C°). Make the adjustment at
the throttling range potentiometer marked
THROT RANGE (refer to Figure 2 ).
Select the RA/DA mode by positioning the operation
mode jumpers either vertically or horizontally (refer to
Figure 2). Position the operation mode jumpers
vertically for Reverse Action (RA) or horizontally for
Direct Action (DA).
As shipped from the factory, the RA/DA operation
mode jumpers are installed in the RA mode.
Add-On Modules—S350P Proportional Plus Integral Temperature Stage Module Product/Technical Bulletin 3
Included with the S350P is a Celsius scale throttling
range decal. If the Celsius scale is desired:
minimum output adjustment may also be used to set
valves or dampers to minimum position.
1. Use a small screwdriver to pry underneath the
existing decal and remove it along with the
throttling range, minimum output, and offset
potentiometer knobs.
Make the adjustment at the minimum output
potentiometer marked as MIN OUTPUT (Figure 2).
For each 10% increase in range, one bar on the LED
indicator appears.
2. Apply the Celsius scale decal where the original
decal was located.
Note:
Before setting the minimum output
potentiometer, be sure the control is not
generating an analog output signal.
3. Rotate all knob stems completely
counterclockwise.
4. Reinstall the potentiometer knobs so the arrows
are at the furthest counterclockwise scale position
(refer to Figure 2).
0%
20%
50%
Output (mA)
20
Minimum Output Adjustment
The minimum output adjustment sets the minimum
voltage or milliampere output provided by the S350P.
It can be adjusted from 0 to 60% (0 to 6 VDC or
0 to 12 mA) of the output range.
10
4
0
2
4
6
8 10 12 14 16 18 20
0
Deviation Above Setpoint
Example: A controlled device responding to a
4 to 20 mA output would require the minimum output
to be adjusted to 20% or 4 mA (refer to Figure 4). The
Figure 4: Output vs. Deviation from Setpoint for:
Minimum Output = 0, 20, and 50%,
Throttling Range = 20°F
Direct Acting
Throttling
o
Range = 6 F
100%
% Output
80%
Direct
Acting
60%
o
Offset = 4F
40%
Minimum
Output =20%
20%
72
A350
o
Setpoint = 72 F
74
76
78
S350P Calculated
o
Setpoint = 76F
80
82
o
Temperature F
84
Figure 5: Example of S350P Adjustments
Integration Constant
Proportional only controls cannot hold a process at the
exact setpoint. A proportional offset is always present
because the control output is 0% at setpoint. Any load
on the system causes the control point to be offset
from the setpoint. The greater the load on the system,
the further the control point offsets from the setpoint
(this is commonly referred to as proportional offset)
and under maximum load this error approaches the
throttling range.
Some proportional only controls are designed with
their setpoint located midway through the proportional
band to help compensate for the offset. This results in
a plus/minus error from the setpoint rather than a
single-ended error.
The S350P has an integration feature that forces the
control point to match the S350P calculated setpoint.
Over time, the S350P controls the heating/cooling
equipment to balance the system load at the
calculated setpoint (refer to Figure 6).
4 Add-On Modules—S350P Proportional Plus Integral Temperature Stage Module Product/Technical Bulletin
On traditional proportional plus integral controls, the
amount of correction becomes too large if the system
load exceeds the capacity of the equipment. When
the actuated device (valve or damper) is fully open or
closed and the setpoint still cannot be reached, the
integration error continues to grow. The result is
called integral windup. The S350P avoids integral
windup with a patented circuit that puts a dynamic
ceiling on the integrator. This circuit resets the
integration error when the sensor goes just above the
calculated setpoint plus the throttling range (in DA
mode) or just below the calculated setpoint minus the
throttling range (in RA mode). This allows the process
to recover from an out-of-range condition without a
large overshoot.

The S350P has three field-selectable integration
constants and an off position. The integration DIP
switch selects the integration constant. (Refer to
Figure 2 for location.) The field-selectable integration
constants include:



Off (Switch 1 to On position, all others Off)
Provides proportional only operation.
Slow (C3) (Switch 2 to On position, all others
Off) This is the slowest integration constant
(equal to 26 minutes) and is suitable for most
proportional plus integral applications. Slow is the
recommended initial setting.
Medium (C2) (Switch 3 to On position, all
others Off) Selects a 13-minute integration
constant. If the rate of system recovery to setpoint
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 to On position, all others
Off) This is the fastest integration constant
(equal to 6.5 minutes). Use the fast setting only in
instances where the rate of change at the sensor
is extremely rapid and system capacity can
compensate for that rapid change.
Proportional Only Control
Temperature
Load Change
Proportional
Offset
System Load
Throttling
Range
Control Point
Follows the Load
Error
S350P
Calculated
Setpoint
Time
Proportional
Offset = 0
Tem perature
Proportional Plus Integral Control
System Load
Load Change
Integration adjusts the
proportional output to
bring the process to
setpoint regardless of load.
Error
S350P
Calculated
Setpoint
Time
Figure 6: Operation of Proportional Only vs. Proportional Plus Integral Control
Add-On Modules—S350P Proportional Plus Integral Temperature Stage Module Product/Technical Bulletin 5
D imensions
0.145 Mounting Slot
3.68 for No. 6 Screws
0.5
13
2.94
75
1.56
40
0.42
11
5.00
127
S350P
2.40
61
DIN Rail
Mount
2.40
61
0.85
22
0.875
22
Conduit
Hole
Figure 7: S350P Dimensions, in./mm
6 Add-On Modules—S350P Proportional Plus Integral Temperature Stage Module Product/Technical Bulletin
I

nstallation and Wiring
The S350P Temperature Control is housed in a
compact NEMA 1 plastic enclosure designed for
standard 35 mm DIN rail mounting. The S350P is
not position sensitive but should be mounted for
convenient wiring and adjustment. Four key-slot
mounting holes on the back of the control case are
provided should surface mounting be required.
Note:
When mounting the S350P (or any
System 350 module) to rigid conduit, attach
the hub to the conduit before securing the
hub to the control enclosure.
!
CAUTION: Risk of Electrical Shock.
Disconnect the power supply before making
electrical connections to avoid electric shock.
MISE EN GARDE: Risque de décharge
électrique.
Débrancher l'alimentation avant de réaliser tout
raccordement électrique afin d'éviter tout risque de
décharge électrique.
!
CAUTION: Risk of Property Damage.
Do not apply power to the system before checking
all wiring connections. Short circuited or
improperly connected wires may result in
permanent damage to the equipment.
MISE EN GARDE: Risque de dégâts matériels.
Ne pas mettre le système sous tension avant
d'avoir vérifié tous les raccords de câblage. Des
fils formant un court-circuit ou connectés de façon
incorrecte risquent d'endommager
irrémédiablement l'équipement.

Install all wiring to conform to the National
Electrical Code and local regulations. For
maximum electrical rating of control, refer to the
label inside the control cover. Only use copper
conductors.

The S350P can produce a variable signal from
0 to 10 VDC or 0 to 20 mA. (Both outputs can
be used simultaneously.) Connections are
made to the terminal block located in the wiring
compartment at the bottom of the case.
Connections can be made to both the voltage
and milliampere outputs, allowing the S350P to
drive two outputs off the same RA or DA ramp
simultaneously. This feature can be used to
drive motor actuators of several different types
in a single application.
Table 2: Terminal Designations
Terminal
Designation
V
Terminal
Description
0 to 10 VDC output
COM
Common
I
0 to 20 mA output
A djustments
Follow these procedures to set up the S350P for the
types of operation desired.
1. Remove S350P cover by loosening the
four cover screws (Figure 2).
2. Set the RA/DA operation mode jumpers to the
desired mode of operation. Position the
operation mode jumpers vertically for RA
(Reverse Acting) or horizontally for DA (Direct
Acting) (Figure 2).
3. Adjust the offset potentiometer to the number of
degrees from the A350 control’s setpoint that
the S350P begins throttling. Clockwise rotation
increases offset.
4. Adjust the throttling range potentiometer to
desired setting. Rotate clockwise to increase
the throttling range.
Note:
Included with the S350P is a Celsius
scale throttling range decal. Refer to
the Throttling Range (Proportional
Band) section of this bulletin for decal
installation instructions.
If the S350P is to be used in proportional plus
integral mode, the initial throttling range
adjustment is seldom set below 6F° (3C°). A
narrow proportional band used in conjunction
with the integration may result in unstable
control.
5. If minimum output is required, set the minimum
output potentiometer (labeled MIN OUT) to the
desired position (Figure 2). Output can be read
with a voltmeter or can be adjusted using the
ten segment, front panel LED.
Add-On Modules—S350P Proportional Plus Integral Temperature Stage Module Product/Technical Bulletin 7
Note:
Before setting the minimum output
potentiometer, be sure the control is not
generating an analog output signal.
For each 10% increase in range, one bar lights
on the LED bar graph. In a milliampere
application, each bar equals 2 mA. In a voltage
application, each bar equals 1V. (Refer to
Figure 4 for an example.)
Example: To set the S350P for a minimum
output of 4 mA, turn the minimum output
potentiometer clockwise until the second LED
segment lights. Slowly rotate the potentiometer
counterclockwise just until the second segment
disappears.
6. Make sure the system is stable in the
proportional mode before selecting integration.
Refer to Checkout Procedure.
7. Reinstall the cover and secure in place with the
four cover screws.
C heckout Procedure
Follow this procedure to ensure the S350P is
connected and functioning properly.
1. Before applying power, make sure that the
installation and wiring connections comply with
job specifications.
2. Set the system for the proportional mode and
tune it for stable operation.
3. After making adjustments and electrical
connections, put the system into operation and
observe at least three complete operating cycles
to determine that the system is stable.
4. If integration is required, select the Fast (C1),
Medium (C2), or Slow (C3) integration constant.
Slow is the recommended initial setting. (Refer
to the Integration Constant section of this
bulletin.)
1. Check for proper voltage applied to the A350
control.
a. Connect a Digital Voltmeter (DVM) between
the 24V (+) and C (-) terminals located on
the A350’s left side terminal block.

If an external transformer is used, select
AC volts on the DVM and verify that the
voltage is between 20 and 30 VAC.

If a Y350R Power Module is used,
select DC volts on the DVM and verify
that the voltage is between 16 and 38
VDC.
 If an external DC power supply is used, select
DC volts on the DVM and verify that the voltage is
between 22 and 29 VDC.
b. If the DVM voltage is within the indicated
voltage range, proceed to Step 2.
c.
If the DVM voltage is not within the
indicated voltage range, check wiring, and
then replace the Y350R or the external
transformer.
2. Check temperature sensor for proper
resistance.
a. Take an independent temperature reading
at the sensor location (Ts). Allow the
thermometer to stabilize before taking the
reading.
b. Disconnect the sensor from the control.
Using an ohmmeter, measure the resistance
across the two sensor leads. Consult the
Temperature vs. Resistance Chart (Figure
8) to verify sensor conformity.
c.
Replace the sensor if its actual performance
deviates substantially from that represented
on the chart.
5. Observe operation and make additional
adjustments as necessary to obtain stable
control.
T roubleshooting
If the control system does not function properly,
verify the proper operation mode is selected on each
module (e.g., RA/DA) and perform the following:
8 Add-On Modules—S350P Proportional Plus Integral Temperature Stage Module Product/Technical Bulletin
°F
°C
260
121
240
110
220
98.8
200
87.7
Temperature
180
76.6
160
65.5
140
54.4
120
43.3
100
e. Adjust the minimum output to zero again
and select the DA mode. The “V” output
voltage should be greater than or equal to
10 VDC, the “I” current output should be
greater than or equal to 20 mA, and the
rightmost LED should be on. If not, replace
the S350P.
32.2
80
21.1
60
f.
Slowly increase the setpoint on the A350.
The LEDs should turn off from the right side
to the left side of the bar graph, until all are
off (indicating that the A350 setpoint dial has
reached a value equal to the sensor
temperature minus the S350P’s offset). If
they do not, then replace the S350P.
Note:
Although unlikely, it is possible that a defect
in one S350 could cause defective
symptoms in all modules. Plug each stage
module into the A350 and individually check
its performance as outlined in Steps 3a to
3f.
10
40
-1.1
20
-12.2
0
-23.3
-20
-34.4
-40
600
800
1000
1200
1400
1600
1800
2000
Resistance in Ohms
Figure 8: Temperature vs. Resistance Chart
for the SET189A Series Sensor
Note:
The sensor reading indicated by the D350
may differ somewhat from thermometer
readings due to sensor tolerances, time
constants, thermometer accuracy, and other
factors.
3. Check the S350P for proper operation.
Note:
Steps 1 and 2 must be performed first.
a. Reconnect the sensor to the A350 and
re-apply power.
b. Turn the A350’s setpoint to minimum.
c.
Do not make field repairs or perform calibration.
SET189A Temperature Sensors and replacement
controls are available through local Johnson
Controls representatives.
On the S350P, turn the throttling range and
the minimum output to the minimum position
by turning both potentiometers
counterclockwise. Switch the integration off
and select the RA mode.
d. Adjust the minimum output to the maximum
position by turning the potentiometer
clockwise. As the potentiometer is turned
clockwise, the LEDs in the bar graph should
turn on from left to right until the fifth or
sixth bar is on. If they do not, replace the
S350P.
Repairs
Do not make field repairs or perform calibration.
SET189A Temperture Sensors and replacement
controls are available through Johnson Controls
representatives.
O rdering Information
Table 3: Ordering information
Product Code Number
Description
S350PQ-1C
Electronic Proportional Plus
Integral Temperature Stage
Module
Add-On Modules—S350P Proportional Plus Integral Temperature Stage Module Product/Technical Bulletin 9
Specifications
Product
Input Voltage
Ambient Temperatures
Humidity
Analog Outputs
S350P Proportional Plus Integral Temperature Stage Module
5 VDC Reference Provided by the A350; 24V Power Supply
Operating:
Shipping:
-30 to 150°F (-34 to 66°C)
-40 to 185°F (-40 to 85°C)
0 to 95% RH Non-condensing; Maximum Dew Point: 85°F (29°C)
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.
Mode of Operation
Direct or reverse action is jumper selectable.
Offset Range
0 to 30F° (0 to 17C°)
Throttling Range
2 to 30F° (1 to 17C°)
Integration Constant
Material
Agency Listing
Four Selectable Rates: Fast, Medium, Slow, and Off
Case, Cover: NEMA 1 High-impact Thermoplastic
UL Guide No. XAPX and cUL Guide No. XAPX7, File E27734
The performance specifications are nominal and conform to acceptable industry standards. For application at conditions beyond these specifications,
consult the local Johnson Controls office. Johnson Controls, Inc. shall not be liable for damages resulting from misapplication or misuse of its products.
Building Efficiency
507 E. Michigan Street, Milwaukee, WI 53202
® Johnson Controls and PENN are registered trademarks of Johnson Controls, Inc. in the
United States of America and/or other countries. All other trademarks used herein are the property
of their respective owners. © Copyright 2014 by Johnson Controls, Inc. All rights reserved.
10 Add-On Modules—S350P Proportional Plus Integral Temperature Stage Module Product/Technical Bulletin
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