ICP DAS USA DB25 - Manual (Page 14)

DeviceNet to PLCs or Devices
8
E
XAMPLE
A
PPLICATIONS
DeviceNet Host to Serial PLC with Pass-Through Connection
DeviceNet Host to Multi-Dropped Serial PLCs
NOTE: Multiple PLCs/Devices can be connected to Port 2 of a DN-3000 if:
Supported PLC or Device
Programming
Software
(if supported)
2 3
DN-3000
DeviceNet Host
PLC # 1
RS-422/485
Multi-Drop
Network
DeviceNet Host
2 3
PLC # 2
DN-3000
PLC # 3
Up to 32
PLCs
may be
connected
PLC # 4 PLC # 5 PLC # 6 PLC # 7
1) All PLCs/Devices use the same protocol.
2) Each PLC/Device can be internally addressed with a network address.
3) Each PLC/Device can communicate on a RS-485/422 multi-drop communications network;
-OR- RS232 to RS485 converters (1 per PLC or Device) are used;
-OR- a 3rd Party multi-port communications expansion module (Port Expander) is used.