20
LRR 1-50, LRR 1-51 - USA - Installation & Operating Manual -
850702-01
Connecting the LRG 16-4 conductivity electrode
Please use a shielded, multi-core TC-ER control cable with minimum wire size AWG18, e.g.,
OELFLEX CONTROL TM CY 5G1, to connect the equipment. Max. length 328 ft (100 m).
Connect the terminal strip as shown in the wiring diagram in
Fig. 3.
Connect the shield to the central grounding point (CGP) in the control cabinet.
Route the connecting cable between items of equipment separately from power lines.
In the control cabinet: Electrically connecting the conductivity
controller
Supply voltage connection
The equipment is supplied with 24 V DC (PELV / CLASS2) and has an external 0.5A medium time-
lag fuse. Please use a safety power supply unit with protective electrical isolation.
This power supply unit must provide a level of isolation against dangerous contact voltages that
at least meets the requirements for double or reinforced insulation in accordance with the follow-
ing standard:
UL 60730-1.
Connecting the output contacts
Connect the upper terminal strip
1
(terminals 16-23) according to the desired switching func-
tions.
Provide an external 2.5A slow-blow fuse for the output contacts.
When inductive loads are switched off, voltage spikes are produced that may have a major ad-
verse effect on the operation of control and measuring systems. Connected inductive loads must
therefore have interference suppression (RC combination) as specified by the manufacturer.
If used as a conductivity limiter, the LRR 1-50, LRR 1-51 conductivity controller does not interlock
automatically when the MAX limit is exceeded.
If the installation requires an interlock, this must be implemented in the downstream (safety)
circuit.
The LRG 16-9 conductivity electrode is equipped with an M12 A-coded, 5-pole sensor connector,
see
Fig. 3.
for assignment. A pre-wired control cable (with connector and socket) is available in
various lengths as an accessory for connecting the equipment.
To connect the LRR 1-50 conductivity controller, please remove the connector and wire the termi-
nal strip as shown in the wiring diagram in
Fig. 3.
Connect the shield to the central grounding point (CGP) in the control cabinet.
If you are not using the pre-wired control cable, lay a shielded 5-core TC-ER control cable with
minimum wire size AWG18, e.g., OELFLEX CONTROL TM CY 5G1, as the connecting cable. In
addition, connect a socket, e.g., Binder series 713 99-0436-58-05, to the control cable at the
electrode end.
Route the connecting cable between items of equipment separately from power lines.
Connecting the LRG 16-9 conductivity electrode
