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The above figure shows how to make a four-wire current measurement.

Connect two-wire sensor to ELC-E-AI(I).

Two-wire sensor wiring is as follows:

1. Connect the output of the sensor to the “ I ” terminal (0 … 20mA current measurement) of ELC-E-AI(I)

module.

2. Connect the attached connector of the sensor to the +24V(L+) of power supply.

3. Connect the current output terminal M to the corresponding M terminals(M1,M2,M3) of ELC-E-AI(I).

ELC-E-PT100

It can be connected with one two-wire or three-wire resistance-type thermocouple.

When two-wire technology applied, the terminals “ M1+ and IC1 ” ( this rule also shall be applied to ” M2+ and

IC2 ” , “ M3+ and IC3 ” ) would be short connected . Such connection can not compensate error /tolerance

c aused by the resistance in measurement loop. The measurement error of 1 Ω impedance of power cord is

proportional to +2.5 ° C

The three-wire technology can inhibit the influence of measurement results caused by cable

length (ohmic resistance).

Easy xLogic User Manual

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