16
Electrical Connection
– continued –
Wiring diagram for level switch NRS 1-51
8
Mains supply
9
Signal output 1 for external alarm 24-230 V AC/DC 100 mA
0
Control circuit, input and output
a
Wire link, fitted on site, when used as high water level alarm acc. to TRD, EN 12952 / EN 12953
b
Stand-by input 1, 24 V DC, for connecting the logic unit SRL 6-50
c
Level electrode NRG 1...-51, NRG 1...-12
CEP
Central earthing point in control cabinet
Key
27
16
1 2 3 4 5 6 7 8
17 18 19 20 21 22 23 24
9
25
10
26
11 12
28
13
29
14
30
15
Test
*
Fig. 7
L N
(+) (–)
8
9
0
a
0
b
c
– +
*
CEP
* NRS 1-51 with response sensitivity 0.5 μS/cm:
Connect the two internal screens to terminal 5 and
the
CEP
.
M 0.5A
Summary of Contents for NRS 1-51
Page 22: ...22 For your Notes ...
Page 23: ...23 For your Notes ...
