Installation and Operations Guide
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Hardware installation
© Honeywell. All Rights Reserved. LT-VLXEXPAXMIOG Rev. 01
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Note Unlike Alerton VLCs, 4–20mA inputs on EXPs/AXMs DO NOT require
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.
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.
Figure 19 Typical wiring sce narios for 4–20mA input de vice s
2345
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