The Cause Of Malfunctions Related Wiring/Remedy - Mitsubishi Electric GOT2000 Series User Manual

9.2.2

The cause of malfunctions related wiring/Remedy

Grounding of the GOT may cause electric potential difference and noise interference, which may result in GOT
malfunctions.
These problems may be resolved by taking the following measures.
■1. Wiring path of the GOT's ground cable and power line
Bundling the GOT's ground cable and power line together can cause interference noise, which may result in
malfunctions.
Keeping the GOT's ground cable and power line away from each other will help minimize noise interference.
Good: Wiring the ground cable away from the
power cable
■2. Connecting the ground cable from the panel that houses control equipment to the panel to
which the GOT is grounded
When running a single ground cable from the panel that houses such piece of control equipment as a sequencer to the
panel to which the GOT is grounded, the ground cable may have to be directly connected to the terminal on the GOT.
If electric potential difference between the ground points created by it causes malfunctions, lowering the voltage as
shown in Remedy 1 below may solve the problem.
9 - 6
9.2 Power Wiring
FG
Power supply for power equipment
Connection cable
Ground cable from
the panel that houses
control equipment
FG
Power supply for power equipment
Bad: Bundling the ground cable and
the power cable
Connector
conversion box
FG