Connection Diagrams - Siemens SIPROCESS GA700 Compact Operating Instructions

Appendix A
A.1 Ex px safety equipment
⑦
Purging gas outlet → wall-mounted device, Swagelok,
12 mm (outer diameter)
⑨
Exhaust air outlet. If appropriate connection of a 1" line,
max. length 20 m
⑪
Ex power relay SR853
⑬
Electrical line connection wall-mounted device
Figure A-1 Ex p safety equipment, Gönnheimer Elektronik GmbH
Mounting instructions: When not in use, liquid gasket is applied to the purging gas outlet
You will find the information relevant for installation and operation of the Ex p safety equipment
with the wall-mounted device in the corresponding manufacturer documentation.
The connection diagram shown refers to the example of the pressurized enclosure system
"F870S-HD" distributed by Gönnheimer Elektronik GmbH:
If you are using safety equipment from other manufacturers, contact your Siemens service
partner, if applicable.
A.1.2

Connection diagrams

Accumulation of potentially explosive gases
Explosion hazard
Potentially explosive gases can accumulate in the enclosure during maintenance work.
• Purge the enclosure with inert gas once maintenance work is complete.
Note
Optical signaling of the maintenance mode
To recognize the enabled maintenance mode (Bypass) of the Ex p safety equipment, we
recommend connecting an optical sensor on site.
Note
When leaving bypass mode, the purging unit F870S returns to the same mode it was in
previously (pre-purging phase or purging phase).
102
WARNING
⑧
Ex p controller F870S
⑩
Electrical line connection customer
⑫
FS870S.702 mounting plate
⑭
Electrical connections I/O customer
Compact Operating Instructions, 01/2022, A5E35134047-11
⑦
Devices in explosion-proof design
.