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SC-F70
SC-F70
PID Operation Operating Instructions
1.4 Wiring Procedure
Refer to the following "Wiring Precautions" and to "Terminal
Configuration" on page 14, to install the cabling.
Warning
Read the following precautions for selecting and wiring cables.
Improper wiring may cause unexpected, intermittent, or difficult-to-
analyze problems.
Wiring Precautions
1. For input and output signal wire (measurement input, analog input,
transmission output, and control output to the valve):
1.) Lay input and output cables as far as possible from power lines to
the controller or other equipment to avoid noise interference,
especially from inverter power lines as they are liable to produce
interference requiring countermeasures be taken on the inverter
side to suppress noise emission.
2.) Use an electrically isolated receiver when transmission outputs
are utilized. If the receiver is not an isolated type, the connection
must be made using an isolation amplifier.
3.) Use shielded cables for input and output signal cables.
4.) When using shielded cables, to prevent noise from being generated
due to floating capacity and the difference in grounding potential
between the cable core and shield, ground the shield as follows:
a. If the signal source is grounded, ground only the side closest
to the signal source.
b. If the signal source is not grounded, ground the controller side.
!
Signal source
Controller
Controller
Signal source