Serial Line

Overview

The serial line can be used to communicate with devices supporting the Modbus protocol as either master or slave, ASCII protocol (printer, modem...) and Machine Expert Protocol (HMI,...).

Characteristics

Characteristic		Description
Function		RS485 or RS232 software configured
Connector type		RJ45
Isolation		550 Vac
Baud rate		1200...115200 bps
Cable	Type	Shielded
Cable	Maximum length (between the controller and an isolated junction box)	30 m (98.43 ft) for RS485 15 m (49.21 ft) for RS232
Polarization		Software configuration is used to connect 576 Ω polarization resistors when the node is configured as a master.

NOTE: Some devices provide voltage on RS485 serial connections. Do not connect these voltage lines to your controller as they may damage the controller serial port electronics and render the serial port inoperable.

NOTICE
	INOPERABLE EQUIPMENT Use only the VW3A8306R•• serial cable to connect RS485 devices to your controller. Failure to follow these instructions can result in equipment damage.

Pin Assignment

The following figure shows the pins of the RJ45 connector:

This table describes the pin assignment of the RJ45 connector:

Pin	RS232	RS485
1	RxD	N.C.
2	TxD	N.C.
3	N.C.	N.C.
4	N.C.	D1
5	N.C.	D0
6	N.C.	N.C.
7	N.C.	N.C
8	Common	Common
N.C.: No connection

WARNING
	UNINTENDED EQUIPMENT OPERATION Do not connect wires to unused terminals and/or terminals indicated as “No Connection (N.C.)”. Failure to follow these instructions can result in death, serious injury, or equipment damage.

Status LED

See the description of the SL status LED.