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NRG 16-51, NRG 17-51, NRG 19-51 - USA - Installation & Operating Manual -
850692-00
Electrical connection
Connecting the level electrode
Please use the following to connect the level electrode:
■
For an NRS 1-51 level switch with a response sensitivity of 5 ppm (10 µS/cm):
Use a shielded, multi-core TC-ER control cable with minimum wire size AWG 18, e.g., OELFLEX
CONTROL TM CY 5G1.
Wire the terminal strip as shown in the wiring diagram.
Fig. 21
. Connect the shields to terminal 5
and to the central grounding point
(CGP)
in the control cabinet.
1. Undo the screw
v
.
Fig. 20
2. Remove the upper part
x
of the connector from the level electrode, leaving the insulating
plate
z
on the contact plate
A
.
3. Remove the cover
w
.
4. Press the connection plate
y
out of the upper part
x
of the connector.
The upper part of the connector can be turned in increments of 90°.
5. Detach the cable gland
C
and cable clamp
B
from the upper part
x
of the connector.
6. Pull the cable through the cable gland
C
and upper part
x
of the connector and insert the
terminals of the connection plate
y
as shown in the wiring diagram.
7. Press the connection plate
y
into the upper part of the connector, and correctly align the
cable.
8. Secure the cable with the cable clamp
B
and cable gland
C
.
9. Put on the cover
w
and insert the screw
v
.
10. Position the upper part of the connector on the level electrode and secure with the screw
v
.
NRG 16-51F, NRG 17-51F, NRG 19-51F with aluminum terminal box
NRG 16-51, NRG 17-51, NRG 19-51 with four-pole connector
1. Undo the screws
b
and take off the cover
d
of the terminal box.
Figs. 15, 16
2. Undo the cable gland
c
. Pull the cable through the cable entry.
3. Detach the terminal strip
f
from the circuit board.
4. Wire the terminal strip as shown in the wiring diagram.
5. Fit the terminal strip.
6. Tighten the cable gland to seal the cable entry.
7. Fit the cover
d
of the terminal box and securely tighten the screws
b
.
Tools
■
Phillips screwdriver size PH1
■
Flat blade screwdriver size 3/32 in (2.4 mm))
■
Open-ended wrench size 19
