Schneider Electric Processor Adapter manual Two-Wire Cabling Schemes for Modbus RS485 Networks

Using the Modbus Ports

Two-Wire Cabling Schemes for Modbus RS485 Networks

Introduction	Two-wire cabling schemes may be used for single master/slave or multimaster/
	slave communications. Masters may be located anywhere in the network.
	CAUTION
	POTENTIAL FOR MULTIMASTER CONFLICTS
	Configure a multimaster network carefully to avoid masters issuing simultaneous or
	conflicting commands to the same slave module.
	Failure to observe this precaution can result in injury or equipment damage.
Length
	The maximum length of cable from one end of network to other is 2000 ft. (609 m).
Number of
	The maximum number of devices in a network is 64 if all are Momentum devices.
Devices	Otherwise, the maximum is 32.
Termination
	One end of the cable run must be terminated with a terminating resistor (color code
	is red).
	The other end of the cable must be terminated with a terminating shunt, which
	connects the transmit pair to the receiver pair (color code is blue).
	Description	Part Number
	Modbus Plus or Modbus RS485 Terminating RJ45 Resistor Plugs	170 XTS 021 00
	(pack of 2)
	Modbus RS485 Terminating RJ45 Shunt Plugs	170 XTS 042 00

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