Johnson Controls System 350, S350As, S350Cs, S350P, S351A Technical Bulletin

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Page 1
System 350™
and S352A Pressure Stage Modules
The S350A, S351A, and S352A Stage Modules are intended to be used with System 350™ controls. Each of these stage modules plugs into the respective control module to add multiple-stage capability. These stage modules have Single-Pole, Double-Throw (SPDT) relay output with Light-Emitting Diode (LED) indication.
As are all System 350 products, the stage modules are housed in NEMA 1, high-impact thermoplastic enclosures. The modular design provides easy, plug-together connections for quick installation and future expandability.
FANs 930, 125
Product/Technical Bulletin S350
Issue Date 0300
Modular Design
Plug-together Connectors
and 35 mm DIN Rail Mounting
Selectable Mode of
Operation
Adjustable Differential
Adjustable Offset
Figure 1: System 350 Stage Module
Features and Benefits
Permits system to be configured to equipment, with convenient, future expansion made easy
Eliminates wiring between modules and reduces installation costs
Provides independent relay energization, either above or below setpoint, for cooling/heating (S350A), dehumidification/humidification (S351A), or direct acting/reverse acting (S352A)
Enables user to match the range of temperature, humidity, or pressure stage modules to specific application requirements
Allows multiple stage sequencing of 1-30F° (0.5-17C°) (S350A), 2-30% RH (S351A), or 2-50 psi (S352AA-2)
© 2000 Johnson Controls, Inc.
Part No. 24-7664-1, Rev. D www.johnsoncontrols.com Code No. LIT-930080
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pplication
A
The S350A, S351A, and S352A Stage Modules receive power, setpoint, and sensor input from the respective System 350 control modules. When connected, the individual modules act as a multistage control system.
The maximum number of stages that can be used in a system varies with the control module type (temperature, humidity, or pressure) and stage module design.
Refer to Table 1 or Table 2 to determine the maximum number of stages that may be used with each control module. When mixing stage module designs, always use the lower number.
Note: When using an external transformer, the
Y65 Series or other 40 VA Class 2 transformers are recommended.
Table 1: Maximum Number of Add-on Modules when Powered by a Y350R Power Module
Control Module
A350A A350B A350E
A350P
A350R A350S
W351A
W351P
P352AB
P352PN
Stage
Module
No. Model
Numbers
9
S350As or S350Cs
6
S350As or S350Cs with 1 S350P S350As or S350Cs
4
with 2 S350Ps
42S350As or S350Cs
S350As or S350Cs with 1 S350P
9
S350As or S350Cs
6
S350As or S350Cs with 1 S350P S350As or S350Cs
4
with 2 S350Ps
5 S351As 1 D351
4 S351As 1 D351
5 S352As 1 D352A
4 S352As 1 D352A
Display Module
No. Model
Number
1 D350
1 D350
2 D350s
Table 2: Maximum Number of Add-on Modules when Powered by an External Transformer
Control Module
Stage
Module
No. Model
Numbers
A350A A350B A350E
A350P
A350R A350S
W351A
W351P
P352AB
P352PN
9
S350As or S350Cs
8
S350As or S350Cs with 1 S350P S350As or S350Cs
7
with 2 S350Ps
9
S350As or S350Cs
8
S350As or S350Cs with 1 S350P S350As or S350Cs
7
with 2 S350Ps
9
S350As or S350Cs
8
S350As or S350Cs with 1 S350P S350As or S350Cs
7
with 2 S350Ps
9 S351As 1 D351
9 S351As 1 D351
9 S352As 1 D352A
9 S352As 1 D352A
Notes: This bulletin only refers to the S350A, S351A,
and S352A Stage Modules.
For information on the S350C refer to the
System 350
TM
S350C Temperature Slave Stage Module Product/Technical Bulletin (LIT-930084).
For information on the S350P refer to the
System 350
TM
S350P Proportional Plus Integral Temperature Stage Module Product/Technical Bulletin (LIT-930086).
For information on the D350, D351 and D352 refer to the
System 350
TM
D350 Display Modules Product/Technical Bulletin (LIT-930070)
.
Display Module
No. Model
Number
1 D350
1 D350
2 D350s
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S350A Temperature, S351A Humidity, and S352A Pressure Stage Modules Product/Technical Bulletin
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O
peration
The S350A, S351A, and S352A Stage Modules provide SPDT relay output. A front panel LED lights to indicate when the relay is energized.
IMPORTANT: The System 350 Stage Modules
are intended to control equipment under normal operating conditions. Where failure or malfunction of the System 350 Stage Modules could lead to an abnormal operating condition that could cause personal injury or damage to the equipment or other property, other devices (limit or safety controls) or systems (alarm or supervisory systems) intended to warn of or protect against failure or malfunction of the System 350 Stage Modules must be incorporated into and maintained as part of the control system.
Offset Adjustment
The offset adjustment determines the amount of offset from the control module setpoint at which the stage module relay de-energizes.
With the jumpers positioned vertically, the stage module is set for Heating (S350A), Humidification (S351A), or Reverse Acting (RA) (S352A) operation. In this mode, the relay and LED indicator de-energize when the sensed temperature, humidity, or pressure rises to the setpoint
minus
offset value.
Note: The S350A, S351A, and S352A Stage
Modules are configured with the jumpers in the horizontal position at the factory.
Refer to Figures 6, 7, and 8 for examples of S350A, S351A, and S352A applications.
imensions
D
Mounting Slots
For No. 6 Screws
1-1/2
(40)
1/8 (4)
2-15/16
(75)
7/16
(11)
DIN Rail Mount
5 (127)
1-3/16
(31)
ON
JOHNSON
CONTROLS
CONTROLS
2-3/8
(61)
S350
O
O
Differential Adjustment
Differential is defined as the difference in degrees, % RH, or psi between energization and de-energization of the stage module’s relay.
Operation Mode Selection
The S350A, S351A, and S352A utilize jumpers (at jumper terminal J2) to select the operation mode. (See
Adjustments
With the jumpers positioned horizontally, the stage module is set for Cooling (S350A), Dehumidification (S351A), or Direct Acting (DA) (S352A) operation. In this mode the relay and LED indicator de-energize when the sensed temperature, humidity, or pressure drops to the setpoint
section and Figures 3, 4, and 5.)
plus
offset value.
2-3/8
(61)
7/8 (22)
Conduit
Hole
7/8 (22)
Figure 2: System 350 Stage Module
Dimensions, in. (mm)
ounting
M
Each System 350 Stage Module is housed in a compact NEMA 1 plastic enclosure designed for standard 35 mm DIN rail mounting. Four key-slot mounting holes on the back of the control case are provided for surface mounting. (See Figure 2.) The modules are not position sensitive, but should be mounted for convenient access to wiring and adjustments.
Note: When mounting any System 350 module to
rigid conduit, attach the hub to the conduit before securing the hub to the control enclosure.
S350A Temperature, S351A Humidity, and S352A Pressure Stage Modules Product/Technical Bulletin
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djustments
A
Refer to the following steps for adjusting stage module settings. (See Figures 3, 4, and 5.)
!
WARNING:
Risk of Electrical Shock.
Disconnect power supply to avoid possible electrical shock or equipment damage. More than one disconnect may be required to completely de-energize equipment.
1. Ensure all power to system is off.
Each stage module may be receiving separate power sources. Make sure all power sources to each stage module are off.
2. Remove the stage module cover by loosening the four captive cover screws.
Set the mode of operation
3.
by positioning the jumpers (at jumper terminal J2) for Cooling, Dehumidification, or Direct Acting mode. Position the jumpers vertically for Heating, Humidification, or Reverse Acting mode.
Note: The S350A, S351A, and S352A Stage
Modules are configured with the jumpers in the horizontal position at the factory.
Adjust the differential
4.
using the potentiometer marked DIFF to the desired setting (the difference in degrees, % RH, or psi between energization and de-energization of the stage module’s relay).
Adjust the offset
5.
using the potentiometer marked OFFSET to the number of degrees, % RH, or psi from the System 350 control’s setpoint at which the stage relay de-energizes (above setpoint with Cooling, Dehumidification, or Direct Acting mode selected, or below setpoint with Heating, Humidification, or Reverse Acting mode selected).
6. Replace the cover on the stage module and fasten in place with screws.
7. Restore power to system.
Potentiometer
Module
Connector
Relay Energized
LED Indicator
Cover Screw
1 of 4
Offset
N.C.
Relay
Relay
COM
Output
Differential
Potentiometer
Module
Connector
Jumper
Position at J2
Heating
Cooling
N.O.
Terminals
Figure 3: Interior View of S350A Stage Module
Offset
Potentiometer
Module
Connector
Relay Energized
LED Indicator
Cover Screw
1 of 4
N.C.
Relay
Relay
COM
Output
Differential
Potentiometer
Module
Connector
Jumper
Position at J2
Humidification
Dehumidification
N.O.
Terminals
Figure 4: Interior View of S351A Stage Module
Offset
Potentiometer
Module
Connector
Relay Energized
LED Indicator
Cover Screw
1 of 4
Relay
Differential
Potentiometer
Module
Connector
Jumper
Position at J2
Reverse
Acting Direct
Acting
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S350A Temperature, S351A Humidity, and S352A Pressure Stage Modules Product/Technical Bulletin
N.C.
Relay
COM
Output
N.O.
Terminals
Figure 5: Interior View of S352A Stage Module
Page 5
Higher
Temperature
Setpoi nt
Temperature
Lower
Temperature
ON Differential
ON
Differential
OFF
OFFSET
OFF
OFF
ON = Energized
OFF = De-energized
A350
Stage 1
S350A
Stage 2
Cooling
OFFSET
Differential
S350A
Stage 3
ON
OFFSET
OFF
Differential
S350A
Stage 4
Heating
ON
S350A
Stage 5
OFFSET
OFF
Differential
ON
Higher
Pressure
Setpoint
Pressure
Lower
Pressure
Differential
ON
Differential
OFF
OFFSET
OFF
ON = Energized
OFF = De-energized
P352AB
Stage 1
S352A
Stage 2
Direct
ON
OFFSET OFF
S352A
Stage 3
Reverse
Differential
ON
S352A
Stage 4
OFFSET
OFF
Differential
ON
Figure 6: Example of a Heating/Cooling
Application Using One A350 and Four S350As
Higher
Humidity
Setpoi nt Relative
Humidity
Lower
Humidity
ON Differential
OFF
ON = Energized
OFF = De-energized
W351
Stage 1
Dehumidify
OFF
OFFSET
S351
Stage 2
ON
Differential
OFFSET
OFF
S351
Stage 3
Humidify
Differential
ON
OFFSET
OFF
S351
Stage 4
Differential
ON
Figure 7: Example of a
Humidification/Dehumidification Application
Using One W351 and Three S351As
Figure 8: Example of a Reverse Acting/Direct
Acting Application Using One P352AB
and Three S352As
iring
W
Refer to the following guidelines and wiring diagrams for proper wiring and terminal designations (See Figures 9, 10, and 11.)
Note: For information on connecting to an external
transformer refer to the applicable control bulletin.
!
WARNING:
Risk of Electrical Shock.
Disconnect power to avoid possible electrical shock or equipment damage. More than one disconnect may be required to completely de-energize equipment.
IMPORTANT: Make all wiring connections in
accordance with the National Electrical Code and all local regulations. Use copper conductors only. Do not exceed the control’s electrical ratings.
S350A Temperature, S351A Humidity, and S352A Pressure Stage Modules Product/Technical Bulletin
The stage modules plug into the control and other add-on modules via 5-pin connectors located on either side of each module. Wiring is made at the Normally Open (N.O.)/Normally Closed (N.C.) relay terminal strip. (See Figures 3, 4, and 5.)
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Page 6
Wire
Ter min al
Block
24V
COM
VDC SEN
120 VAC
SEN
Shield (Connect
only to COM on A350)
A350
COM
Y350R
Sensor
Isolate and tape. (Do not ground
this end of cable shield.)
S350A D350
S350A S350A
Load
Load
Load
Load
Figure 9: Typical Multistage Temperature Control System Using 120 VAC Power Supply
Transmitter
Wire
Ter min al
Block
24V
COM
VDC SEN
120 VAC
SEN
only to COM on W351)
W351 Y350R
VDC
Shield (Connect
Load Load
COM
S351A D351S351A S351A
Isolate and tape. (Do not ground
this end of cable shield.)
Load
Load
Figure 10: Typical Multistage Humidity Control System Using 120 VAC Power Supply
SEN
only to COM on P352AB)
P352AB
VDC
Shield (Connect
Y350R S352A S352A
COM
Wiring Harness
Isolat e and tape. (Do not ground
this end of cable shield.)
P399 Transducer
D352AS352A
Wire
Ter min al
Block
24V
COM
VDC
SEN
120 VAC
Figure 11: Typical Multistage Pressure Control System Using 120 VAC Power Supply
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S350A Temperature, S351A Humidity, and S352A Pressure Stage Modules Product/Technical Bulletin
Load
Load
Load
Load
Page 7
heckout Procedure
C
Before applying power, make sure installation and wiring connections are according to job specifications. After necessary adjustments and electrical connections have been made, put the system in operation and observe at least three complete operating cycles before leaving the installation.
roubleshooting
T
If the control system does not function properly, first verify that the control, power, and display modules are all operating correctly (refer to the respective literature). Then inspect the stage modules for proper operation.
Check that the proper operating mode (Cooling/Heating, Dehumidification/Humidification, or Direct Acting/Reverse Acting) has been selected on each stage module. (See
Adjustments
section and Figures 3, 4, and 5.) Then perform the following procedures to determine the problem.
1. Verify the system has power.
2. Note the offset and differential settings on the
stage module.
3. Turn the setpoint dial on the control module to
minimum.
4. Increase the setpoint by slowly adjusting the
setpoint dial until the stage relay LEDs turn On and Off as shown in Tables 3, 4, or 5.
Table 3: S350A Relay Troubleshooting
Operation
LED
Mode
Cooling
Cooling
Heating
Heating
*(Ts) = sensed temperature
On Closed
Off Open (Ts) – offset
On Closed
Off Open (Ts) + offset
N.O. Relay Status
Setpoint Dial Setting
(Ts)* - offset
-
differential
(Ts) + offset
+
differential
Table 4: S351A Relay Troubleshooting
Operation Mode
LED N.O.
Relay Status
Dehumidify
Dehumidify
Humidify
Humidify
*(RHT) = actual relative humidity at transducer
On Closed (RHT)* -offset
Off Open (RH
On Closed (RH
Off Open (RHT) + offset
Setpoint Dial Setting
-
differential
) - offset
T
) + offset
T
+
differential
Table 5: S352A Relay Troubleshooting
Operation Mode
LED N.O.
Relay Status
Direct
Direct
Reverse
Reverse
*(psiT) = actual pressure at transducer
On Closed (psiT)*- offset
Off Open (psi
On Closed (psi
Off Open (psiT) + offset
5. If the relays do not perform as indicated in Tables 3, 4, or 5, adjust the stage module’s differential and offset potentiometers to minimum and repeat Steps 1 through 3.
6. If the relays still do not turn on and off, replace the defective stage modules.
Note: There is the unlikely possibility that a defect in
one stage module could cause defective symptoms in all modules. Plug each stage into the control individually and check the performance of each as explained above.
epairs and Replacement
R
Do not make field repairs or perform calibration. Sensors and replacement controls are available through your local Johnson Controls representative.
Setpoint Dial Setting
differential
) - offset
T
) + offset
T
differential
-
+
S350A Temperature, S351A Humidity, and S352A Pressure Stage Modules Product/Technical Bulletin
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rdering Information
O
Table 6: Ordering Information
Item Product Code
Description
Number
S350A Temperature Stage Module
S351A Humidity Stage Module
S352A Pressure Stage Module
pecifications
S
Product
Input Voltage
Power Consumption
Output Relay Electrical
Ratings
Differential Adjustment
Range
Offset Range
Ambient Temperature
Ambient Humidity
Material
Mounting
Agency Listing
The performance specifications are nominal and conform to acceptable industry standards. For application at conditions beyond these specifications, consult Johnson Controls/Penn Application Engineering at (414) 274-5535. Johnson Controls, Inc. shall not be liable for damages resulting from misapplication or misuse of its products.
S350AA-1C Temperature Stage Module with Fahrenheit Scale
S350AB-1C Temperature Stage Module with Celsius Scale
S351AA-1C Humidity Stage Module with percent RH Scale
S352AA-2C Pressure Stage Module with psi Scale
S350AA: Temperature Stage Module with Fahrenheit Scale S350AB: Temperature Stage Module with Celsius Scale S351AA: Humidity Stage Module with Percent RH Scale S352AA-2: Pressure Stage Module with psi Scale
S350AA: Provided by the A350 S351AB: Provided by the W351 S352AA-2: Provided by the P352AB
1.0 VA maximun
SPDT Enclosed Relays 10 Ampere Non-inductive, 125 VA Pilot Duty, 24/240 VAC 1/2 hp 120/240 VAC
S350AA: 1 to 30F° S350AB: 0.5 to 17C° S351AA: 2 to 10% RH S352AA-2: 2 to 50 psi
S350AA: 1 to 30F° S350AB: 0.6 to 16.7C° S351AA: 2 to 30% RH S352AA-2: 2 to 50 psi
Operating: -30 to 150°F (-34 to 66°C) Shipping: -40 to 185°F (-40 to 85°C)
0 to 95% RH (Non-condensing)
Case, Cover: NEMA 1 High Impact Thermoplastic
Wall or DIN Rail
UL Listed, CCN XAPX, File E27734 UL Listed for Canada, CCN XAPX7, File E27734
Controls Group
507 E. Michigan Street P.O. Box 423 Printed in U.S.A. Milwaukee, WI 53201 www.johnsoncontrols.com
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S350A Temperature, S351A Humidity, and S352A Pressure Stage Modules Product/Technical Bulletin
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