10
In control cabinet: Wiring level switch
Wiring diagram for level switch NRS 1-53
5
Connection of supply voltage
24 V DC
with fuse 0.5 A (semi-delay) provided on site
6
Reference electrode or vessel used as functional earth
7
MIN 2 electrode rod or MIN electrode rod
8
MIN 1 electrode rod
9
Central earthing point (CEP) in control cabinet
0
MIN 1 output contact
a
MIN 2 output contact
b
Wire link, provided on site if only one electrode rod is used
Key
Fig. 3
5
9
(–) (+)
7
M 0.5 A
(semi-
delay)
8
6
a
0
b
0
a
M 0.5 A
(semi-
delay)
6
7
9
5
(–) (+)
