961-20A0-010 Datasheet, PDF (9/36 Pages) Magnetrol International, Inc. – Ultrasonic Single and Dual Point Level Switches

Ground
FORCE ^FORCE
CHANGE ^FAULT
Shield: 1, 3
Signal: 2, 4
TB3
037-3316-xxx Cabling
TB2
Electronics Module
Remote Transducer Housing
Figure 9
Model 961 Loop-Powered Remote Transducer Wiring
Malfunction
SPDT Relay
Lower Gap
SPDT Relay
Ground
Upper Gap
SPDT Relay
Input
Power
NC C NO NC C NO NC C NO L1
L2
MALF RELAY
LOWER
UPPER
MALF
TEST
MALF UPPER
FAULT LOWER
Hi PC
Lo LC
MODEL 962
TIME
DELAY
LEVEL
TEST
Figure 10
Model 962 Line-Powered Wiring
2.4.3 Model 962 Line-powered Wiring
Power and relay wiring connections are suitable for
12–24 AWG wire.
Caution: OBSERVE ALL APPLICABLE ELECTRICAL CODES
AND PROPER WIRING PROCEDURES.
1. Make sure the power source is turned off.
2. Unscrew and remove housing cover.
3. Pull power supply and relay wires through the conduit
connection.
4. Refer to Figure 10. Connect power leads to proper terminals.
Model 962 is available for AC power (102 to 265 VAC) or
for DC power (18–32 VDC)
a. AC Power – Connect “hot” wire to terminal marked L1
and the “neutral” wire to the terminal marked L2. The
green head screw should be used for grounding.
b. DC Power – Connect wires to terminals (+) and (-) on
the terminal block. The green head screw should be
used for grounding.
5. Connect desired relay wiring as shown in Figure 10.
6. Prevent moisture seepage into housing by installing an
approved seal drain fitting in the conduit run leading to
the unit.
7. Wiring is complete. Replace housing cover.
Caution: In hazardous areas, do not power the unit until the
conduit is sealed and enclosure cover is screwed
down securely.
51-646 Echotel^® Model 961 & 962 Ultrasonic Level Switches
9