Epson EM07ZS1647F User Manual page 113

4.1.3.3 Noise Intrusion
Verify how an error occurrence condition changes while taking the following
countermeasures.
♦ Ground of FG (DRAIN) wire
Normal Grounding: Ground the DeviceNet network at only one point.
Shield (S)
Countermeasure 1: Disconnect the wire between V- and FG.
Fieldbus I/O Rev.6
Power Supply Tap
V+ V+
CAN H CAN H
Shield (S)
CAN L CAN L
V- V-
V+ V- S
V+ V- FG
Communications
power supply
24 V DC
Disconnect the wire between V- and FG when you cannot ground the FG wire.
Power Supply Tap
V+
CAN H
Shield (S)
CAN L
V-
V+ V- S
V+ V- FG
Communications
Power Supply
24 V DC
DeviceNet cable
Ground 100 Ω or less.
V+
CAN H
Shield (S)
DeviceNet cable
CAN L
V-
Disconnect here.
Ground 100 Ω or less.
4. Troubleshooting (DeviceNet)
101