Siemens SIMATIC ET 200iS Manuel D'utilisation page 412

Intrinsic Safety Control Drawing A5E00158421-01
ET 200iS
4. The above mentioned power supply, the IM and the I/O modules may be inserted and
removed within the (classified) hazardous area while powered.
5. Third party approved associated apparatus must be installed in accordance with
manufacturer instructions.
6. The maximum voltage U
hazardous area may not exceed 250 Vac.
7. The installation must be in accordance with NEC ANSI / NFPA 70 Article 504 or 505,
ANSI / ISA-RP 12.6 and CEC section 18.
8. For installation in Class II, Division 1 or 2 and Class III, Divison 1 or 2 Hazardous
(Classified) Locations, the system must be installed in an NRTL listed dust-ignition-proof
enclosure suitable for such locations.
9. The entity concept allows connection between intrinsically safe apparatus and intrinsically
safe and associated apparatus when the following rules are followed:
U , V < U , V
o oc i max
, I < I , I
I
o sc i max
P < P , P
o i max
C , C > C + C
o a i cable
L , L > L + L
o a i cable
10. WARNING: SUBSTITUTION OF COMPONENTS MAY IMPAIR THE INTRINSIC SAFETY
OR SUITABILITY FOR DIVISION 2
Copyright 2004 by Siemens AG. All Rights Reserved
A5E00158421-01
used or generated by the equipment installed outside the
M
system in total
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