SOR Single Point Ultrasonic Level Switch User Manual
Page 5
Form 841 (08.13) ©SOR Inc.
5/16
Ensure that wiring conforms to all applicable local and national electrical codes and install
unit(s) according to relevant national and local safety codes.
Make sure the power source is turned off.
Power Supply Voltage (Volts)
Maximum Loop Resistance (Ohms)
(including Barrier Resistance
1500
1400
1300
1200
1100
1000
900
800
700
600
500
400
300
200
100
0
1 Ohm at
11 VDC
0 5 10
15
20
25
30
35
1470 Ohms
at 36 VDC
765 Ohms
at 24 VDC
Loop Resistance vs. Power Supply Voltage
1000
Ohms at
28 VDC
1118 Ohms
at 30 VDC
Remove the housing
cover.
Pull power and signal
wires through the
conduit connection and
into the control housing.
Locate TB1 on the
control board. (See
)
Terminals are labeled “+“
and “-“. Connect power
leads to the proper
terminals.
Do not exceed the
maximum
loop
resistance for the circuit.
(See
)