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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