SOR Single Point Ultrasonic Level Switch - Manual (Page 9)

Form 841 (08.13) ©SOR Inc. 9/16
Circuit Board Replacement

Disconnect power to the unit.

Remove the housing cover.

Slide out PC board.

Disconnect power wiring and sensor plugs J1 and J2. (See ) Remove the ground
screw in the housing bottom.

Slide the ring terminal over the ground screw and replace it into the housing bottom.

Slide the new board into the control housing.

Connect the sensor plugs to the new board. One sensor wire plugs into J2. The other
sensor wire plugs into J1.

Reconnect power and replace the housing cover.
Replacement Circuit Boards
Match the characters of your model number with those shown below to select the proper
replacement board part number. Accessory designators are located at the end of the model
number in no particular order.
Accessory Designator
Model Number with DT without DT
701

4-U-P9-C 38-123 38-125
Cable Shielding
Probe Wire Shield Bead
Short/Fat Bead
Power Wire Shield Bead
Install end of bead as close
to cable gland as possible
2 loops
Positive
Negative
2 loops
Long/Slender
Bead
In order to achieve the stated accuracy of +/-1mA, a shielded cable, cable gland and shield-
ed beads must be used. SOR recommends using a shielded cable made of PVC insulation
around a tinned copper braid shield (Offlex CY cable or equivalent). Refer to illustrations
below for installation of shield beads