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.
Released for: Schneider Electric Macedonia
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