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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.
❑
Modular Design
❑
Plug-together Connectors
and 35 mm DIN Rail
Mounting
❑
Selectable Mode of
Operation
❑
Adjustable Differential
❑
Adjustable Offset
© 2000 Johnson Controls, Inc.
Part No. 24-7664-1, Rev. D
Code No. LIT-930080
System 350™
S350A Temperature, S351A Humidity,
and S352A Pressure Stage Modules
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)
Product/Technical Bulletin S350
Figure 1: System 350 Stage Module
FANs 930, 125
Issue Date 0300
1
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Table of Contents
Related Manuals for Johnson Controls System 350
Summary of Contents for Johnson Controls System 350
- Page 1 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.
- Page 2 Table 2: Maximum Number of Add-on The S350A, S351A, and S352A Stage Modules receive power, setpoint, and sensor input from the Modules when Powered by an External respective System 350 control modules. When Transformer connected, the individual modules act as a multistage control system.
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Page 3: Operation
The S350A, S351A, and S352A utilize jumpers (at jumper terminal J2) to select the operation mode. (See Each System 350 Stage Module is housed in a Adjustments section and Figures 3, 4, and 5.) compact NEMA 1 plastic enclosure designed for With the jumpers positioned horizontally, the stage standard 35 mm DIN rail mounting. - Page 4 Figure 4: Interior View of S351A Stage Module 5. Adjust the offset using the potentiometer marked OFFSET to the number of degrees, % RH, or psi Offset Differential from the System 350 control’s setpoint at which Potentiometer Potentiometer the stage relay de-energizes (above setpoint with Module...
- Page 5 Higher Higher Pressure Temperature OFFSET Setpoint OFFSET Temperature Setpoint OFFSET OFFSET Pressure OFFSET OFFSET OFFSET ON = Energized OFF = De-energized ON = Energized OFF = De-energized Lower Temperature Lower Pressure S352A S352A P352AB S352A A350 S350A S350A S350A S350A Stage 3 Stage 4 Stage 1...
- Page 6 Sensor Shield (Connect Isolate and tape. (Do not ground only to COM on A350) this end of cable shield.) A350 Y350R S350A S350A S350A D350 Wire Terminal Block 120 VAC Load Load Load Load Figure 9: Typical Multistage Temperature Control System Using 120 VAC Power Supply Transmitter Shield (Connect Isolate and tape.
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Page 7: Checkout Procedure
Do not make field repairs or perform calibration. Heating Open (T s ) + offset Sensors and replacement controls are available ) = sensed temperature through your local Johnson Controls representative. S350A Temperature, S351A Humidity, and S352A Pressure Stage Modules Product/Technical Bulletin... -
Page 8: Ordering Information
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.