Epson EM07ZS1647F - Manual (Page 115)

4. Troubleshooting (DeviceNet)
♦ Communications Power Supply
When sharing one power source with the communications power supply and I/O devices,
provide respective power sources separately.
Separating power source prevents noise caused by I/O device operations from affecting
communication.
Communications
Power Supply 24V
Power Supply Tap
Disconnect I/O devices from the communications power supply.
Fieldbus I/O Rev.6 103