A.1.4. Wiring for pumps installed with PTC
ib,IS
6
L1 L2 L3
4
5
1 2 3
Wiring for Intrinsically Safe Apparatus
Pos.
Description
1
Wire for PTC
2
Wire for moisture switch, level switch
3
Common branch
4
Main contactor
5
Overload relay
2)
For non-Ex products it is optional.
40
+
-
7
3
1
4
2
1
2
3
8
-
+
NO/NC-1
T1
T2
NO/NC-2
3
1
4
2
7
Pos.
Description
6
Power supply: 24V DC
7
Intrinsically Safe Apparatuses
8
Thermistor relay
9
Pump controller module
9
-
+
DI1
DI2
2)