External Wiring 5-1 To - Hitachi HIDIC EH-150 Instruction Manual

Resistance thermometer input module(eh-pt4)

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5. External Wiring

5.1 Wiring

PT100

External wiring(Note1)

Use a shilded cable

PT100

Grounding (Note2)

Note 1: The external wire length should be less than 200 m for each channel. In addition, the total resistance of the

wires of each channels to be connected to the current terminals (A0 to A3, B0 to B3) should be less than 400

ohm.

Note 2: Earth the shield of the cable for the one side or the both sides, which depends on the environment.

Note 3: The earth terminal on the power supply module and External power supply 24 VDC must be connected

to the earth, otherwise the data will be undefined.

5. External Wiring

External power supply

24VDC

Fig. 5.1 External Wiring

5-1

A0 to 3 : Current terminal

B0 to 3: Cuurent terminal

b0 to 3: Voltage terminal

Make a Short-circuit on

unused channel, shown as the

figure. The data will be

H7FFF. Otherwise it will be

undifined.

+24V

-24V

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