SOR Single Point Ultrasonic Level Switch - Manual (Page 5)

Form 771 (08.13) ©SOR Inc. 5/20
Discharge the Sensor
Temperature changes which occur during shipment may result in a small electrical charge
inside the sensor crystals. This charge is harmless to humans, but may result in damage to
the electronics if the sensor is plugged in before it is discharged. To discharge the sensor,
touch a wire to each sensor connector so that the center conductor
and outside shell make contact. (See
)
Plug in Connections Inside Electronics Housing
Plug sensor extension cables onto the PC board as follows:

Connect cable A to J1.

Connect cable T to J2. (See to locate J1 and J2.)
OUT connections are located
on the opposite side of the
board from the IN connections.
Do not use positions 3 & 4 to
connect wires.
Connect
long sensor lead (A) to IN 1
Connect short sensor lead
(T) to IN 2
Remote Interconnect Board
located inside sensor base
Connect extension
lead T to OUT 2
Connect extension lead A to OUT 1
Electrical Connection
Explosion Proof and Non-Agency Listed model
TB2
Remote Self-Test Terminal Block
(Non-Intrinsically Safe Units Only)
TB1
Loop Power
Terminal Block
- Terminal
+ Terminal
Electrical power must be disconnected from explosion proof models before
the cover is removed. Failure to do so could result in severe personal injury
or substantial property damage.
Ensure that wiring comforms 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.

Remove the housing cover.

Pull power and signal wires
Short each center
conductor to the
shell to discharge
sensor crystals.
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 )