Specifications

WESTLOCK CONTROLS CORPORATION
280 MIDLAND AVENUE, SADDLE BROOK, NJ 07663 TEL: [phone] FAX: [phone]
www.westlockcontrols.com
1/12/10 TECH-439/D.W.O. 19024 Page 55 of 58
Control Schematic for Wiring of Intrinsically safe ICoT (WD-10836) for US & CANADA
(Sheet 4 of 4)
Entity parameters for each field wiring terminal pair of ICoT:
Vmax = 30V Imax = 100mA Pi=0.75 Watt
Ci = 0 pF Li = 17.25 uH
CSA Notes:
1. Barrier must be a CSA certified, single channel grounded shunt-diode zener barrier or single channel isolating
barrier or one dual channel or two single channel barriers may be used where both channels have been
certified for use together with combined entity parameters.
The following conditions must be satisfied:
Voc or Vo Vmax or Ui Ca > Ci + C Cable
Isc or Io Imax or Ii La > Li + L Cable
2. Associated apparatus manufacturer’s installation drawing must be followed when installing this equipment.
3. Control equipment connected to associated apparatus must not use or generate more than 250V.
4. To maintain intrinsic safety, each field wiring pair (4-20 mA and Analog Output) must be run in separate
cables or separate shields connected to intrinsically safe (Associated Apparatus) ground.
5. ROSEMOUNT
®
275 HART
®
COMMUNICATOR is NOT FMRC approved for use in Class II and III Hazardous
Locations.
6. For Class II and III locations where rigid metal conduit is not used, seal ICoT cable entries against dust and
fibers using an appropriate NRTL listed cable gland fitting.
7. Installation should be in accordance with ANSI/ISA RP12.6 and the National Electrical Code (ANSI/NFPA 70).
8. Install in accordance with Canadian Electrical Code Part 1.