19
Connection of level electrode
To connect the level electrode(s) please use:
n
For the level switch NRS 1-50 with a response sensitivity of 10 μS:
Multi-core screened control cable, min. conductor size 0.5 mm², e. g. LiYCY 4 x 0.5 mm²,
max. length 100 m.
n
For the level switch NRS 1-50 with a response sensitivity of 0.5 μS:
Multi-core double-screened low-capacitance data cable, min. conductor size 0.5 mm²,
Li2YCY PiMF 2 x 2 x 0.5 mm², max. length 30 m.
Wire terminal strip in accordance with the wiring diagram.
Fig. 23.
Wire the screens to terminals 5 and
13 and to the central earthing point
(CEP)
in the control cabinet.
Electrical connection
- continued -
1. Loosen screw
q
.
Fig. 22
2. Remove upper part
s
of the terminal box from the level electrode but leave insulating plate
u
on
contact plate
v
.
3. Remove cover
r
.
4. Press connecting plate
t
out of the upper part of the terminal box
s
.
The upper part of the terminal box can be turned in steps of 90°.
5. Detach cable gland
x
and cable clamp
w
from the upper part of the terminal box
s
.
6. Run cable through cable gland
x
and upper part of the terminal box
s
and wire terminals of the
connecting plate
t
in accordance with wiring diagram.
7. Press connecting plate
t
into the upper part of the terminal box and align cable.
8. Fix cable with cable strain relief
w
and cable gland
x
firmly into position.
9. Replace cover
r
and insert screw
q
.
10. Put upper part of the terminal box onto the level electrode and fix it with screw
q
.
NRG 16-50, NRG 17-50, NRG 19-50, NRG 111-50, with four-pole connector
NRG 16-50 F, NRG 17-50 F, NRG 19-50 F, NRG 111-50 F, with aluminium terminal box
1. Loosen screws
b
and remove housing cover
d
.
Fig. 13, 14
2. Loosen cable gland
c
. Pull cable through cable entry.
3. Remove terminal strip
f
from board.
4. Connect terminal strip according to the wiring diagram.
5. Attach terminal strip.
6. Tighten the cable gland in order to seal the cable entry. Use the supplied sealing plug to seal off
the unused cable entry and tighten the cable gland.
7. Mount housing cover
d
and tighten screws
b
.
Tools
n
Screwdriver, size 1
n
Screwdriver, size 2.5, completely insulated according to DIN VDE 0680-1
n
Open-end spanner A.F. 18 (19) mm
Summary of Contents for NRG 111-50
Page 22: ...22 For your Notes ...
Page 23: ...23 For your Notes ...
