FANs 930, 125
Product/Technical Bulletin S350
Issue Date 0300
© 2000 Johnson Controls, Inc.
1
Part No. 24-7664-1, Rev. D www.johnsoncontrols.com
Code No. LIT-930080
System 350™
S350A Temperature, S351A Humidity,
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.
Figure 1: System 350 Stage Module
Features and Benefits
❑
Modular Design
Permits system to be configured to
equipment, with convenient, future expansion
made easy
❑
Plug-together Connectors
and 35 mm DIN Rail
Mounting
Eliminates wiring between modules and
reduces installation costs
❑
Selectable Mode of
Operation
Provides independent relay energization,
either above or below setpoint, for
cooling/heating (S350A),
dehumidification/humidification (S351A), or
direct acting/reverse acting (S352A)
❑
Adjustable Differential
Enables user to match the range of
temperature, humidity, or pressure stage
modules to specific application requirements
❑
Adjustable Offset
Allows multiple stage sequencing of 1-30F°
(0.5-17C°) (S350A), 2-30% RH (S351A), or
2-50 psi (S352AA-2)
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