Figure 8-76 Typical Fl-Net System Power Supply Wiring And Grounding - Hitachi S10mini User Manual

8 APPENDIXES
Distribution
Control
switchboard
power
supply
Class D
grounding

Figure 8-76 Typical FL-net System Power Supply Wiring and Grounding

8.7.3 Power supply wiring and grounding for FL-net system network devices
Figure 8-77 shows a typical power supply wiring/grounding scheme for the network devices of the
FL-net system.
When making power supply wiring and ground connections, observe the following instructions:
• Connect the ground terminal on a coaxial cable to the Class D ground that is dedicated to the
controller.
• Connect the frame ground of the 10BASE-T hub to the Class D ground that is dedicated to the
controller. Also, ensure that the 10BASE-T hub receives power from the same insulating
transformer with a static shield as for the controller power supply.
• Do not connect the controller's FG (frame ground) terminal to the frame of the control panel.
Provide the controller with dedicated Class D or higher grounding.
• Connect the FG (frame ground) terminal on the FL.NET module to the FG (frame ground)
terminal on the controller.
• Connect the shield ground of the transceiver (AUI) cable to the FG (frame ground) terminal on the
FL.NET module.
operational
Ry circuit
100 VAC
Panel ground
Panel ground
(5.5 mm
Class D
grounding
Controller control
Pre-
panel
2
or more)
8-70
PLC, etc.
H
FG
L
LG
Controller ground
2
(5.5 mm or more)
Class D
grounding