FANs 930, 930.5, 125, 121
Product/Technical Bulletin A350E
Issue Date 0899
© 1999 Johnson Controls, Inc.
1
Part No. 24-7664-400, Rev. B
www.johnsoncontrols.com
Code No. LIT-930015
System 350
A350E Electronic Cooling Control
The A350E is an on/off, electronic, cooling-only control
with Single-Pole, Double-Throw (SPDT) relay output
and Light-Emitting Diode (LED) relay status indication.
A cooling-only control, the A350E has two features that
differentiate it from the A350A/B Series Electronic
Temperature Controls: a selectable minimum setpoint
and short/open sensor detection. The A350E also has
an adjustable differential and an interchangeable
temperature sensor.
As are all System 350™ products, the A350E is
housed in a NEMA 1, high-impact plastic enclosure.
The modular design provides easy, plug-together
connections for quick installation and future
expandability.
Figure 1: A350E Electronic Cooling
Control
Features and Benefits
❑
Modular Design
Enables stage, display, and power modules to
be purchased and installed as necessary
❑
Minimum Setpoint
Selections
Allows the selection of a minimum setpoint at
which the equipment can be set to control
❑
Reacts to Short or Open
Sensor Condition
Deenergizes output relay if the sensor or
sensor wiring fail
❑
Wide Adjustable Differential
of 1 to 30F° (0.6 to 16.7C°)
Enables the user to match equipment cycle
rate and/or sequencing for a given application
❑
Plug-together Connectors
and 35 mm DIN Rail
Mounting
Eliminates wiring between modules and
reduces installation costs
❑
One Dual-scale Model
Covers a Temperature
Range of 10 to 65°F
(-12 to 18°C)
Supports the majority of Fahrenheit and
Celsius cooling applications
❑
Interchangeable
Temperature Sensors
Increases versatility and serviceability
