822-1002-C01 Datasheet, PDF (11/40 Pages) Magnetrol International, Inc. – Kotron® Sentinel Models 822, 832 and 842

D3
D4
NC
NC
R4
C
R3
C
NO
R1
NO
R2
D2
D5
NC
C
NO
1
NC
C
NO
8
F2
R7
R6
R5
Figure 13
1.7 Wiring
WARNING! Explosion hazard. Do not disconnect equipment unless
power has been switched off or the area is known to
be safe.
1.7.1 Relay Wiring
The recommended connection of power and control
circuits is 16 AWG or 18 AWG stranded wire.
To improve external noise immunity, electrical snubbers
are provided on the relay contacts. These are factory
installed between the common (C) and the normally open
(NO) contacts. The position of the snubbers should be
changed between the C and NC contacts if the normally
closed (NC) contacts are used.
NOTE: If the snubbers are not wired properly in parallel with the relay
contacts, external electrical noise may disturb the operation of
the instrument.
Refer to Section 1.7.3, Relay Wiring Chart for different
relay wiring options. Refer to Figure 13 for terminal
locations.
NOTES:
1. Relay 2 and relay 3 can be utilized for lead-lag pump sequenc-
ing (models 832 and 842 only).
2. Relay 1 can be utilized as a dedicated diagnostic alarm.
Refer to Calibration sections (pages 10–23) for proper use
of these relays.
1.7.2 Power Wiring
1. Ensure that power source is turned off.
2. Pull power supply wires through conduit connection.
3. Connect the positive supply wire to the H terminal, and
the negative (neutral) supply wire to the N terminal.
Connect the ground wire to the green ground screw in the
bottom of the housing.
4. Dress the wires together neatly and secure with cable ties.
Be certain that adequate clearance exists for replacement of
housing cover
NOTE: Observe all applicable electrical codes and proper wiring
procedures.
50-621 Kotron Sentinel Models 822, 832 and 842 RF Point Level Switches
8