How To Ground The Network - Hitachi HIDIC EH-150 Applications Manual
Devicenet master module(eh-rmd)/ slave controller(eh-iocd)/ discrete i/o slave unit (rdx16d,rdy16tp,rdy16r)
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Also See for HIDIC EH-150:
- Applications manual (114 pages) ,
- Instruction manual (29 pages) ,
- Applications manual (28 pages)
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13.7 How to Ground the Network
DeviceNet uses one-point grounding in order to prevent a ground loop.
Connect the drain line of the communication cable to the FG terminal of the communication power
supply and provide Class D grounding as shown in the figure below.
If two or more communication supply units are used, only one of them should be grounded with the
shielding line. Furthermore, do not connect other communication power supply units with the shielding
line.
• Do not ground the shielding line of the communication cable at multiple places in the network.
The grounding must be made at only one place.
• Make sure to provide Class D grounding.
• Provide a dedicated grounding, separated from the power system.
Dedicated tap for the
communication power supply
FG
GND
Communication power supply
Class D grounding
Caution
13-5
Chapter 13 Mounting and Wiring
V+
CAN-H
Drain
CAN-L
V-
+24V
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