Using the Modbus Ports
870 USE 101 10 V.2 127
Two-Wire Cabling Schemes for Modbus RS485 Networks, Continued
Cable All devices are connected with the same pin-for-pin cable, such as the Modbus
Plus or Modbus RS485 Short Interconnect Cable or any Cat. 5 4-Twisted Pair
Ethernet cable AWG#24. A master/slave system using 2-wire cabling does not
require the special master communication cable.
Multimaster/
Slave Cabling The following illustration shows components used in a multimaster/slave network.
Each Momentum module must include a Processor Adapter or Option Adapter with
a Modbus RS485 port.
Continued on next page
Description Part Number
Modbus Plus or Modbus RS485 Short Interconnect Cable.
Color code - black 170 MCI 020 10
Label Description Part Number
1 Terminating resistor plug.
Color code - red 170 XTS 021 00
2Modbus RS485 connector “T” (DB9 base) 170 XTS 040 00
3 Modbus Plus / Modbus RS485 Short Interconnect Cable.
Color code - black 170 MCI 020 10
4 Modbus RS485 connector “T” (RJ45 base) 170 XTS 041 00
5 Terminating shunt plug.
Color code - blue 170 XTS 042 00