Echotel Model 919 Ultrasonic Level Switch
5
2.5.2 All Voltage
Note: To prevent damage to the circuitry, the all voltage unit must
always be used in series with a load. Refer to Figure 10.
Wiring connections for the all voltage version are made at
the three-position terminal block within the electronics
enclosure. Use of 14-22 AWG twisted shielded pair wire is
recommended.
OBSERVE ALL APPLICABLE ELECTRICAL CODES
AND PROPER WIRING PROCEDURES.
1. Make sure the power is turned off.
2. Remove the housing cover.
3. Prevent moisture seepage into housing by installing an
approved seal-drain fitting in the conduit run leading to
the unit.
4. Pull twisted shielded pair wire through the conduit
connection.
5. Connect the hot lead from the power supply to the middle
(24-240 VAC/VDC) position of the terminal block.
6. Connect the return lead to the terminal block designated as
LOAD/CHARGE/LAST, and to the load.
7. Connect the return side of the load to the negative lead of
the power supply.
8. Connect ground wire to the terminal marked
.
9. Dress wiring to ensure no interference or contact with
cover or circuit board components.
Line
Neutral
Fuse
Wrench flats are
aligned with transducer gap
Front view
of gap
Motor
Control
L
N
Figure 8
Model 919 All voltage PC board
Figure 10
Typical Model All voltage unit wiring
Figure 9
Improper All voltage wiring
Caution:
Operation of the all voltage
unit without a load will cause
damage to the circuitry.
Refer to Figure 10.
