SOR Vertical Displacer Top Mounted Series Level Switch - Manual (Page 9)

Form 425 (08.12) ©2012 SOR Inc. 9/16
NOTE: For ATEX or IEC Certifi ed T6 and S3 Enclosures: Electrical conduit connection threads may
be of non-ISO thread form. Check the product certifi cation nameplate for relevant thread form
information before attempting to connect to the electrical conduit connection. In the event a fi tting
or adaptor is used, check the adaptor body for thread form information. The cable entry device
shall be certifi ed under explosion protection type “d” for fl ameproof enclosures, suitable for the
conditions of use if correctly installed.
NOTE: For Product Utilizing a Hermetically Sealed Switch. If the unit is installed in a Class I, Div.
2 location, a conduit seal is not required per the National Electric Code (NEC) 501.5B.
NOTE: For Intrinsic Safety Certifi ed T6 and S3 Enclosures, the parameters are as follows:
Ui = 30V Ii = 1A Ci = 0 Li = 0
NOTE: See Specifi c Condition of Use on page 14 regarding the marking of nameplates for
installation.
 Ensure that the wiring conforms to all applicable local and national electrical codes and
install unit(s) according to relevant national and local safety codes.
 Switch housing conduit connections may be rotated 360° by loosening the set screw
located under the housing base. Do not attempt to rotate without following this
instruction and loosening the set screw. Retighten the set screw after adjusting the
housing. Care must be taken in positioning the incoming wiring to ensure clearance
between the wiring and the switch housing.
 Switch wiring should be brought through the conduit connection, under the baffle plate,
wrapped around the sealing tube and brought up to the proper terminal. All excess wire
should be cut off prior to stripping the wire to avoid interference with the action of the
switch mechanism or housing cover.
 All housings must be properly “sealed” at the conduit connection to maintain the NEMA
classification.
 Check the housing cover-to-base fit to ensure the gaskets are sealed properly.
Electrical Wiring Instructions
Electrical power must be disconnected from explosion proof models before
the cover is removed. Failure to do so could result in severe personal injury
and/or substantial property damage.
Safety Integrity Level (SIL) Installation Requirements
The SOR pressure switches have been evaluated as Type-A safety related hardware.
To meet the necessary installation requirements for the SIL system, the following
information must be utilized:
„ Proof Test Interval shall be one year.
„ Units may only be installed for use in Low Demand Mode.
„ Products have a HFT (Hardware Fault Tolerance) of 0, and were evaluated in a
1oo1 (one out of one) configuration. Form 1538 (03.12) ©2012 SOR Inc.