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5
excom® – Mounting and installation in the Ex-area and Non-Ex-area
5.1
General safety instructions ................................................................................................................ 192
5.2
Correct operation............................................................................................................................... 192
5.3
Conformity to standards of excom® ................................................................................................... 193
5.4
Installation of excom® in the Ex-area and Non-Ex-area...................................................................... 193
5.4.1
5.4.2
5.4.3
Connection of the PLC (programmable logic controller) or SPC (stored program control) ......................................193
Connection of the supply...................................................................................................................................................................193
Connection of the peripherals..........................................................................................................................................................193
– Connection of intrinsically safe field current circuits ..........................................................................................................193
Regulations for use in Zone 1, Zone 2, and in the safe area ..................................................................................................194
Instructions for installation................................................................................................................................................................194
– Connection of the power supply ................................................................................................................................................195
– Connection of the cables ...............................................................................................................................................................195
– Connection of the power supply to the PSD24Ex ................................................................................................................196
– Connection of the power supply to the PSM24-3G .............................................................................................................197
– Connection of the power supply to the PPSA230Ex or the PPSA115Ex ......................................................................198
Equipotential bonding and shielding of the field current circuits ......................................................................................199
– General requirements for equipotential bonding ...............................................................................................................200
Use of the system enclosures...........................................................................................................................................................201
– System enclosures EG-VA 4655… (460 x 550 x 260 mm) ..................................................................................................201
– Dimensional drawing to EG-VA 4655… ...................................................................................................................................203
– System enclosure EG-VA 6555… (650 x 550 x 260 mm) ....................................................................................................205
– Dimensional drawing to EG-VA 6555… ...................................................................................................................................206
– System enclosure EG-VA 8055… (800 x 550 x 260 mm) ....................................................................................................208
– Dimensional drawing to EG-VA 8055… ...................................................................................................................................209
5.4.4
5.4.5
5.4.6
5.4.7
5.5
Instructions concerning the explosion protection certificates .......................................................... 211
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Information for the evaluation of the "U"-certificates ........................................................................................................211
System certification excom®- system enclosure ....................................................................................................................212
Information for system approval of the RS 485-IS (Ex i-layers) ........................................................................................212
U/I-examination of the connection of intrinsically safe bus nodes (fieldbus participants) ..................................213
Evaluation of the external inductance-resistance ratio L0/R0 or rather of the capacities C0 ..................................214
Shield for the segment coupler SC12Ex....................................................................................................................................217
Shielding designs for RS485-IS.....................................................................................................................................................219
D301266 0113 - excom®
191