Overvoltage arresters for ex systems – VEGA Capacitive electrodes EL Profibus PA User Manual
Page 25
Capacitive electrodes EL - Profibus PA
25
Electrical connection
+
E1-
E2+
A1+
A2-
B62-30 W
IN
OUT
1
2
5
6
7
8
PROFIBUS
+
-
EEx ia IIC
see certificate
on
8
7
6
5
4
3
2
1
R
Carrier rail
Profibus PA
e.g.
CAP E34 PA Ex
Overvoltage arresters for Ex systems
B62-30 W can be used as overvoltage arrester in Ex systems. In Ex areas, overvoltage ar-
resters must only be mounted in zone 1 or zone 2 (not in zone 0). You must differentiate
between overvoltage protection of intrinsically and non-intrinsically safe circuits.
For Ex systems, please note the installation conditions as well as the special prerequisites
cited in the respective conformity certificates.
B62-30 W:
9 … 36 V DC, max. 1 A
- Terminal row (IN)
generally unpr
unpr
unpr
unpr
unprotected
otected
otected
otected
otected side of the overvoltage arrester.
- Terminal row (OUT)
generally pr
pr
pr
pr
protected
otected
otected
otected
otected side of the overvoltage arrester.