XLINK 500/100 Operations & Maintenance Manual page # 28
The key settings for 0-5V analog sensors are:
Measurement Type: Analog
Analog Type: 0-5V A or B.
4.11. Connecting 4-20ma Analog Sensors
Certain models support up to three sensors with a 4-20mA output. One sensor can connect
directly to the 4-20mA input as shown below. The other sensors can connect to A or B (0-5V)
analog channels with an external load resistor. The sensor/loop must be powered from
PROT+12V, SWD+12V, main power, or other source with common ground.
The key settings for 4-20mA sensors connected to the 4-20mA input are:
Measurement Type: Analog
Analog Type: 4-20mA
The built-in 4-20mA connection has an internal 200 Ohm load consisting of transient protection
and a precision 100 Ohm sense resistor. External load resistors should also be 100 Ohm for the
system to operate down to voltages between 10-12VDC. In some cases, the 4-20mA sensor may
need supply voltages > 12VDC to operate. The supply voltage needs to be greater than the
minimum voltage the sensor requires plus the maximum voltage across the load resistance (2V
for 100 ohms).
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