SOR Single Diaphragm Weatherproof Differential Pressure Switch with Terminal Block Connections - Manual (Page 3)

Form 506 (01.13) ©SOR Inc. 3/12
Electrical Connection
Ensure that wiring conforms to all applicable local and national electrical codes and install
unit(s) according to relevant national and local safety codes.
NOTE: For B-Series ATEX Certifi ed Models: Electrical conduit connection threads may be of
non-ISO thread form. Check the product nametag for relevant thread form information before
attempting to connect to the electrical conduit connection. In the event a fi tting is used,
check the adaptor body for thread size information.
Electrical Power must be disconnected from explosion proof models before
the cover is removed. Failure to do so could result in severe personal injury
or substantial property damage.
When making electrical connections, use care to avoid movement of the electrical switching element.
Electrical connections are either screw terminals, terminal blocks or 18-gauge, 18-inch wire leads.
Screw terminal and terminal block points are identified on the insulation card inside the electrical
housing. Refer below for wire lead color codes.
NOTE: Storing excess wire or making wire lead splices inside the pressure switch housing should
not be done and may interfere with the pressure switch operation.
WIRE LEAD
COLOR CODE
SPDT
Blue (C)
Black (NO)
Red (NC)
HI
Differential
Pressure

LO
Differential
Pressure
HI
No. 1
Blue (C)
Black (NO)
Red (NC)
Yellow (C2)
Brown (NO2)
Orange (NC2)

No. 2
LO
DPDT (2-SPDT)