Sutron Corporation X-Link Operations & Maintenance Manual, Rev 1.63 5/24/2016 pg. 82
The sensor will likely require
power
– connect that to VREF if 2.5V is
appropriate or to +SW POWER which is 12V (or whatever power X-Link is
supplied with). Make sure to set up the warmup (the amount of time to
power the sensor before reading its output) as required by the sensor.
If the sensor has a power ground, connect that to AGND.
7.1.4.12.
Diff C, Diff D
Connection: Diff C (Terminal #21 and #22)
Connection: Diff D (Terminal #17 and #18)
Optional connection to VREF (#19) and AGND (#16 and #20) as needed
Measurements Diff C and Diff D are designed to operate with a special type of
analog output found on many sensors that use a bridge configuration or any
sensor that outputs a very small voltage. This input type has a + and - input that
connects to the sensor output.
Typically, a bridge sensor will be powered on VREF (sometimes referred to as
excitation), have a and signal –, and provide a wire for the analog
ground. NOTE: If after wiring the sensor, it displays a negative reading, you may
reverse the + and - leads coming from the sensor.
