11
In control cabinet: Wiring level switch
- continued -
Wiring diagram for level switch NRS 2-51
5
Connection of supply voltage
24 V DC
with fuse 0.5 A (semi-delay) provided on site
6
Level electrode NRG 21-..; NRG 26-21.
Up to three NRS/NRR 2-5.. can be connected (parallel connection).
7
Level transmitter NRGT 26-1.., 4-20 mA, screen connected in terminal box.
Up to three NRS/NRR 2-5.. can be connected (series connection).
8
Central earthing point (CEP) in control cabinet
9
MIN output contact, de-energizing delay: 3 sec.
0
MAX output contact, de-energizing delay: 3 sec.
a
Pump output contact
b
Actual value output 4-20 mA
Key
5
7
9
8
a
0
6
NRS 2-51
Fig. 4
M 0.5 A
(semi-
delay)
b
MIN
MIN
MAX
MAX
b
5
9
a
0
M 0.5 A
(semi-
delay)
8
