Owner's manual

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Form 496 (01.13) ©SOR Inc.
Wire Lead Color Code
SPDT
DPDT (2-SPDT)
Vacuum Switch
Installation
Blue (C)
Black (NO)
Red (NC)
Green (GND)
Pressure
Blue (C)
Black (NO)
Red (NC)
Yellow (C2)
Brown (NO2)
Orange (NC2)
Green (GND)
NO2
NO1
Pressure
 Secure housing mounting pad to a bulkhead, panel rack or pipe stanchion with two
suitable 1/4” bolts.
 Line mounting by either process connection or electrical conduit connection is not
recommended.
 Suggested mounting orientation is electrical conduit connection at 6 o’clock to prevent
condensate from collecting in the housing enclosure. However, the device can be
mounted in any position.
Ensure that wiring conforms to all applicable local and national electrical codes and install
unit(s) according to relevant national and local safety codes.
Wiring Schematics for Switching Elements in Compound Vacuum-Pressure Switches
When set point is calibrated
to vacuum, use this schematic.
When set point is calibrated to positive
gauge pressure, use this schematic.
Vacuum
Pressure
Housing Type Conduit Connection Contact Termination Contact Identi cation
Open bracket None
Screw terminals Stamped on insulation
Wire leads Color coded and marked
All others
3/4 NPT(F) or M20 x
1.5(F) unless optional
adapter is specified
Screw terminals Stamped on insulation
Wire leads Color coded and marked
Terminal strip Stamped on insulation