Wiring
The sensor is supplied with a 10 pin mating connector. When wired, it will contain power in, encoder
(when optioned), and analog signal output connections. Therefore, it is recommended that a cable that
provides a shield around the analog signal wires be used. For example, a cable that provides shielded pairs
would suffice, so that the analog signal wires can be shielded from the power supply and encoder wires.
Ground the shield at the DAQ system that is monitoring this sensor.
The signal output is electrically isolated from the power supply. This is done to prevent ground
loops when the signal is fed into a single ended input. This may cause trouble for a differential input due to
common mode drift. When using differential inputs, ground the negative input to an analog signal ground
on the measuring DAQ system.
Shunt Calibration
When the shunt pins on the sensor connector are shorted, the sensor electronics will apply a shunt to the
strain gage bridge, and shift the voltage output from it’s current position. This is a real shunt of the bridge,
not the star bridge shunt that so many rotary transformer systems use. Reference the calibration sheet for the
shunt calibration value. Remove this short to return the sensor to normal operation.
Cleaning:
The TQ514 is a brushless sensor, and therefore, the only wearing parts are the bearings. For the very low
capacities, TQ514-003 and -006 units, these have oiled bearings and will periodically require a drop of high
quality light machine oil on each. Only a drop is required. Clean environments will require a drop every
360 straight hours of use. Dirty or otherwise harsh environments may require more frequent oiling. All
other capacities have bearings that are permanently lubricated. Do NOT immerse the assembly in the
solvent. This may damage the electronics inside the housing.
Recalibration:
To guarantee accuracy, all sensors should be recalibrated on an annual basis.
Function
Connector Description
+12-15Vdc
A
Power Input
+SIG
B
Torque signal (nominally
±
5V at fullscale)
-SIG (COM)
C
Torque signal ground
GND
D
Power ground
GND
E
Encoder ground
+5V
F
Encoder power
CW LEAD
G
Encoder lead
CW TRAIL
H
Encoder trail
GND
J
Shunt calibration
SHUNT
K
Shunt calibration
