Connecting an EGX150 to a serial RS485

Issue
The Serial port for the EGX150 uses an RJ45 connector, which is different from the standard RS-485 connector.

Product Line
Link150, EGX150

Environment
EGX150 serial connections

Cause
The EGX150 does not use the standard RS-485 connector.

Resolution

Table 1: Connector RJ 45 Pinout

Pin Number	Color	Signal name	Description
1	Orange/White striped	Rx-	Receive Data -
2	Orange	Rx+	Receive Data +
3		NC	No Connection
4	Blue	Tx+	Transmit Data +
5	Blue/white striped	Tx-	Transmit Data -
6	-	NC	No Connection
7	-	NC	No connection
8	-	GND	Ground

Connect, using a straight through RJ45 cable to the RS-485 port on your EGX150.
Cut the other end (that is to be connected to your slave device) to expose the wires.

A1. 2-Wire RS-485 connection

Use the Blue wire as the positive (+) and the Blue/White striped wire as the negative (-)

A2. RS-485 2-Wire with Link150 Cable Adapter Connection Diagram

B1. 4-Wire RS-485 connection

Table 2: RJ45 Master/Slave Pinout

RJ45 Pin Number	Master	Slave
1	Rx-	Tx-
2	Rx+	Tx+
4	Tx+	Rx+
5	Tx-	Rx-

B2. RS-485 4-Wire with Link150 Cable Adapter Connection Diagram

Kindly refer to the EGX150 User Guide for details on how to wire the RS-485 port.

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