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Use of the 4-20mA output is not recommended, but the interface could be employed to connect multiple isometer units to a single SA380TX by utilising spare analogue inputs.
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Please consult the Bender user guide for exact terminations if connecting directly to the 4-20mA signal conditioner. Note that if the 4-20mA converter is built into a Network Rail style cubicle arrangement, the connections are brought-out at the base of the cubicle through the terminal block positions 20 (Connect to "24" on the SA380TX) and 21 (Connect to "S" on the SA380TX). |
Be aware that the insulation resistance reading will be prone to error due to the unusual equation used by the 4-20mA signal converter:
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