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 50 of 58
Appendix G
Control Schematic for Wiring of Intrinsically safe ICoT for ATEX & IECEX
(Sheet 1 of 2)
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
1. ATEX Entity approved associated apparatus used in an approved configuration, such that:
A. ICoT Vmax  Voc and Vt of associated apparatus.
B. ICoT Imax  Isc and It of associated apparatus.
C. Ci of ICoT cable capacitance  Ca of associated apparatus.
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. Where rigid metal conduit is not used, seal ICoT cable entries against dust and fibers using
an appropriate NRTL listed cable gland fitting.
6. Installation should be in accordance with EN 60079 and / or the local / national electrical
codes of practice.