Input Wiring - Toho Electronics TRM-10C Instruction Manual

4.2 Input Wiring

CAUTION
①Precautions for the input electric wire
⚫
See that no noise is mixed in input wiring. For input wiring, it is recommended to use a shielding
wire or twisted wire effective for noise.
⚫
In case of thermocouple input, connect a thermocouple wire directly or use a compensating lead
wire. It is recommended to use a shielded input line.
⚫
In case of resistance temperature detector input, dispersion of 3-wire line resistance should be
less than the below mentioned values. It is recommended to use a shielded input line.
For Pt 100, JPt 100 ；50mΩ max.
⚫
When it is likely to be affected by induction noise, particularly when wiring near the high-frequency
power source, it is recommended to use a shielded twisted wire.
⚫
Attach a ring terminal with insulated sleeve (for M3.5) to the end of the electric wire.
② Precautions for wiring
⚫
The wiring between the instrument and measurement point should be kept away from the power
circuit (25V or higher circuit or DO circuit).
⚫
Short-circuit unused input terminals. (Short-circuit between "＋" and "－" in case of mV, V, or
thermocouple input, and short-circuit among A, B, and B in case of resistance temperature
detector input.)
⚫
Ground the shield of connecting wire.
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HXPRM10mnCT001E