SOR Explosion Proof Pressure Switch UL/CSA/ATEX - Manual (Page 3)

Form 316 (01.13) ©SOR Inc. 3/8
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 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 adapter body
for thread size information.
Standard electrical connection is a terminal block.
SPDT
Pressure
Blue (C)
DPDT (2-SPDT)
Blue (C)
Black (NO)
Red (NC)
Yellow (C2)
Brown (NO2)
Orange (NC2)
Green (GND)
NO2 NO1
Pressure
Blue (C)
Black (NO)
Red (NC)
Green (GND)
Overtravel has been preset at the factory, i.e. the switching element
assembly has been precisely positioned in the housing for optimum
performance. It normally should not be changed in the fi eld. Should
adjustment be necessary, factory approved procedures must be closely
followed. Any inadvertent movement or replacement in the fi eld will degrade
performance, void the warranty and could render the device inoperative,
unless factory approved procedures are followed.
B-series is 6-place compression type; J4 is 6-place screw type. The terminal block is marked:
Common (C), Normally Open (NO), Normally Closed (NC). If DPDT is specified, additional
markings are: Common 2 (C-2), Normally Open 2 (NO-2), and Normally Closed 2 (NC-2).
NOTE: Internal primary equipment ground (earth) screw must be used for the equipment ground
connection and the external supplemental ground screw is provided for safety and compliance
with specifi c code requirements.
The electrical compartment cover must remain sealed and the Allen locking
screw tightened at all times to prevent removal of the cover while the
pressure switch is in service.
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.