Ex P Safety Equipment - Siemens SIPROCESS GA700 Compact Operating Instructions

Note
When leaving bypass mode, the purging unit F870S returns to the same mode it was in
previously (pre-purging phase or purging phase).
B.1.1.2

Ex p safety equipment

Pneumatic and electric connections of the Ex p control system (example)
A Ex p controller F870S
B Ex power relay SR853
C Ex interface relay SR852, 16-pin
D Proportional valve
E Pressure regulating valve for purg‐
ing gas with gauge
①
Power connection
②
Purging gas connection to the Ex p controller F870S, 12 mm (0.47") (outer diameter)
③
Purging gas inlet
④
Purging gas outlet
⑤
Purging gas connection from Ex p controller F870S, 12 mm (0.47") (outer diameter)
⑥
Purging gas connection; supply pressure 1000 hPa (rel.)
⑦
Connection from and to Ex interface relay SR852
⑧
Exhaust air outlet. If appropriate connection of a 1" line, max. length 20 m
Figure B-2 Gas path of the Ex p safety equipment, Gönnheimer Elektronik GmbH
Connection information
The supply pressure has to be sufficiently large (2.5 ... 5 bar).
SIPROCESS GA700 rack and wall mounted devices
Compact Operating Instructions, 06/2023, A5E35134047-AB
F Power connection
G Analyzer module 1 (AM1)
H Analyzer module 2 (AM2)
I Flame arrestors
J Signal cable connection
Ex px safety equipment
B.1 Overview
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