―
18
―
HXPRM10mnCT002E
4.2 Input Wiring
CAUTION
①
Precautions 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
；
50m
Ω
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 round press-fitting 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.