Schneider Electric Processor Adapter manual Standard Cabling Schemes, Between Nodes

Using the Modbus Plus Ports

Standard Cabling Schemes

Introduction	In a standard Modbus Plus cabling scheme, each peer device connects via a drop
	cable to a tap along a trunk cable.
Length
	The maximum length of cable from one end of the network to the other is 1500 ft.
	(450 m) if no repeaters are used.
	You can use up to three Modicon RR85 Repeaters to extend the cable to up to
	6000 ft. (1800 m). Each repeater allows you to extend the cable 1500 ft. (450 m).
	Description	Part Number
	Modicon RR85 Repeater	NW-RR85-000
Distance
	Nodes must be separated by at least 10 ft. of cable. This requirement is more than
Between Nodes	satisfied by standard drop cables:
	Description	Part Number
	Modbus Plus Drop Cable, 2.4 m / 8 ft.	990 NAD 211 10
	Modbus Plus Drop Cable 6 m / 20 ft.	990 NAD 211 30
Number of
	The maximum number of devices in a network is 64:
Devices	λ If you use only Momentum products, you may use up to 64 devices on one
	cable section without a repeater.
	λ If you use a mixture of devices, you may use up to 32 devices on one cable
	section. You must use a repeater to connect to another cable section. You may
	use up to three repeaters and four cable sections in all.
Termination
	You must terminate both ends of the network. If your network consists of two or
	more sections separated by a repeater, each section must be terminated at both
	ends.

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