Honeywell ALERTON ACM-VLX Installation And Operation Manual page 37

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Installation and Operations Guide Hardware installation
Unlike Alerton VLCs, 4–20mA inputs on EXPs/AXMs DO NOT require
Note
an external 250 Ohm resistor. Setting the jumper to position 2 places an onboard
250 Ohm resistor in the circuitry.
Set the input jumper to position 2.
1 2 3 4 5
Fig ure 19 Typical wiring s ce narios for 4–20mA input de vice s
0–5VDC inputs
For three-wire devices, the 20 VDC terminal on the EXP/AXM can provide a
power source to 250 mA maximum, which typically connects to the plus (+)
terminal on the device. Connect the device's signal output, typically identified as
Signal or Output +, to the appropriate IN terminal. Connect the device's output
common (typically identified as Output Common, Output –, or –) to the nearest
COM terminal.
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