Wiring - Mitsubishi Electric QJ71DN91 User Manual

5 SETUP AND PREPARATION

5.5 Wiring

Power supply tap
FG V+
Power supply
unit
5 - 9
(1) Connecting a DeviceNet cable
The following explains how to connect a DeviceNet cable to the QJ71DN91.
The figure above shows the QJ71DN91's DeviceNet connector.
Stickers in the colors of respective wires are put on the connector.
Connect the DeviceNet cable correctly so that the colors of the wires will match
those of the stickers.
(2) Grounding the network
The DeviceNet network should be grounded at a single point, near the center of
the network.
Connect the cable shield (drain wire) to the ground terminal of the power supply
unit, and ground it to the protective ground conductor.
If multiple power supply units exist on the network, ground only the power supply
unit near the center of the network, and do not ground others.
Also, in such a case, use power supply taps.
Power supply tap
(near the center of the network)
V- FG
Power supply
unit
V+ (red)
CAN_H (white)
Shield (drain wire)
CAN_L (blue)
V- (black)
V+ V-
MELSEC-Q
Power supply tap
V+
CAN_H
Shield (drain wire)
CAN_L
V-
FG V+ V-
Power supply
unit
5 - 9