Configure the RS485 port

You can configure the RS485 port to so that the Z45 Controller can communicate with a sensor wired to the port.

The RS485 port consists of the TR1 pins: pin 3 (TR1-) and pin 4 (TR1-2).

Note Digi recommends that you use one of the available ground pins (GND) to minimize signal interference.

Before you begin

• Make sure you have the values from the sensor needed to configure the RS485 port: bit rate, character length, parity, and service.

To configure the RS485 pin for your sensor:

1. Log into the Z45 Controller's web UI.

2. Click Admin Main.

3. In the Interfaces section, click RS232/RS485 Ports. The RS232/RS485 Port Configuration page displays.

4. In the RS485 Configuration (TR1) section, configure the RS485 (T1) port using the values needed by the sensor wired to the port.

   • Bit Rate

   • Character Length

   • Parity

   • Service

5. Click Update. The Parameters Successfully Updated banner displays in green at the top of the screen.

6. Click Home to return to the dashboard page.