Grounding The Extension Unit; Wiring Of The Fg Cable Of A Bus Connection Cable - Mitsubishi Electric GOT2000 Series User Manual

8.6

Grounding the Extension Unit

8.6.1

Wiring of the FG cable of a bus connection cable

This section explains wiring of FG cables when a GOT is connected to a PLC CPU with bus connection cables.
■1. Connecting the QCPU/motion controller CPU (Q series) and GOT
Grounding of the FG cable for the QCPU and motion controller CPU (Q series) is unnecessary since they have no FG
cable.
■2. Connecting the QnACPU/ACPU/motion controller CPU (A series) and GOT
Ground a GOT as shown below when GT15-C□EXSS-1 or GT15-C□BS is used.
(1) For GT15-C□EXSS-1
Step 1.
Connect the LG and FG of the GOT power supply at the terminal block and ground them with one cable.
Step 2.
Wire the FG cable of the GT15-C□BS. The length of the cable must be 28 cm or shorter.
Step 3.
Do not connect the ground cable for FG of the GT15-EXCNB.
Step 4.
Connect the FG cable of the GT15-C□BS at the GOT side to FG of the power terminal block of the GOT.
Step 5.
Connect the FG cable of the GT15-C□BS at the PLC side to the FG of the power supply module of the
PLC.
Step 6.
Connect the LG and FG of the PLC at the terminal block and ground them with one cable.
(2) For GT15-C□BS
Perform the grounding at the GOT side (described in (1)) for both GOTs.
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8.6 Grounding the Extension Unit

POINT POINT POINT
Cables connected to the PLC CPU
Do not install the connection cable together with or close to the main circuit lines (high voltage,
large current) or I/O signal lines.
POINT POINT POINT
(1) Terminals of the GOT
Layout of terminal blocks of a GOT differs depending on the GOT model.
Check the terminal layout of the GOT to be used and perform wiring.
(2) Ground cables
Up to two ground cables can be connected to each of LG and FG of the GOT.
When three or more ground cables need to be connected, connect the third and later cables
to the LG.
Not connected
PLC
FG
LG
(GT15-EXCNB)
N
L
(GT15-C□BS)
2SQ wire FG terminal
28 cm or less
GOT
OUT IN
L N LG FG