Schneider Electric Processor Adapter Two Types, Features of an, RS485 Port, Limit of Two

Using the Modbus Ports

Modbus Port 2

Two Types of	Modbus Port 2 is available in two types:
Port
	Component	Type of Port	Type of Connector
	171 CCS 780 00	Built-in, dedicated RS485	9-pin D-shell connector
	171 CCC 780 10	port
	171 CCC 980 20
	171 CCC 980 30
	Processor Adapters
	172 JNN 210 32	User may configure port as	RJ45 phone jack connector
	Serial Option Adapter	RS232 or RS485*
	*If the Option Adapter is combined with the 171 CCS 780 00, or 171 CCC 780 10,
	171 CCC 980 20 or 171 CCC 980 30 Processor Adapter, the Modbus port on the Option
	Adapter will be disabled.
Features of an
	Modbus Port 2 can be configured as an RS485 port. RS485 supports two-wire or
RS485 Port	four-wire cabling. A multimaster/slave system must use two-wire cabling. A single
	master/slave system may use two- or four-wire cabling.
	The RS485 protocol handles messaging over long distances with higher level of
	noise immunity than RS232 without the need for modems.
Limit of Two
	The Momentum M1 Processor Adapters can support a maximum of two Modbus
Modbus Ports	ports.

If a 172JNN 210 32 Serial Option Adapter is used in conjunction with a

171 CCS 780 00 or 171 CCC 780 10 Processor Adapter, the RS485 port on the Processor Adapter becomes Modbus Port 2. The port on the Option Adapter becomes electrically neutral and does not support any communication activities. (The TOD clock and battery backup system on the Option Adapter continue to work.)

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