User’s Guide ______________________________________________________________________
36 ___________________________________________________________________ M010056EN-I
Installation in Hazardous Locations
US and Canadian Requirements
USA (FM): Wiring for intrinsically safe operation is shown in Appendix
B, Wiring for Intrinsically Safe Operation, FM, on page 89.
Canada (CSA): Wiring for intrinsically safe operation is shown in
Appendix C, Wiring for Intrinsically Safe Operation, CSA, on page 91.
European Requirements
CATEGORY 1 (Zone 0)
HMT360 has to be connected to Exia-certified associated apparatus with
galvanic isolation, gas group IIB or IIC.
CATEGORY 2 or 3 (Zone 1 or 2)
HMT360 has to be connected either to a Zener barrier or galvanic isolator
Figure 17 on page 39 and Figure 18 on page 40 present examples of
galvanic isolators and Zener barrier connections (only Ch 1 connected).
NOTE
If both analog outputs are in use, the Ch 1 (-) and Ch 2 (-) must be short
circuited (see Figure 19 on page 41).
NOTE
If both analog outputs are in use with a galvanic isolator, the Ch 1 (-) and
Ch 2 (-) must be short circuited (see Figure 19 on page 41).
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