8
Electrical connection
Install the power supply and the backing pump connection, according to their technical
data to the terminals of the relay box.
– L/L1: Conductor
– N: Neutral
– PE: Protective earth
Secure cables with cable fittings.
Close the relay box.
1
1a
12
1.1
11
11
+
-
Shield
AC in
AC out
20
L1
N
PE
PE
N
L
3
1c
1b
Fig. 4:
Relay box for backing pump, single
phase, 20 A
1 Casing
1.1 Casing
cover
1a
Control lead for electronic drive unit
1b
Mains connection output, backing pump
1c
Mains connection input
3 Relay
11 Cable
fitting
M16
12 Cable
fitting
M12
20 Earthing
cable
L/L1 Conductor (black)
N Neutral
(blue)
PE Protective earth (yellow/green)
