Instructions and Testing

Relay Controller Configuration

  1. Safely disconnect all power to the Relay Controller and ensure no LEDs remain lit.
  2. Remove the WiFi Module in place
  3. Place the USB module in the XBee socket (double check that all of the legs are in place)
  4. Connect the USB to your computer
  5. Apply power back to the relay controller
  6. Run Base Station and connect to the USB controller using baud rate 115200 (
  7. Select Device Configuration in the top left
  1. Set the E3C field value to a non-zero value that will be unique to this RS-485 chain.
  2. Set the Baud Rate field value to 57.6k as shown below
The E3C address must be unique so that only one controller will accept RS-485 commands.
  1. Exit out of Base Station
  2. Power down the board and remove the USB Module
  3. Place the RS-485 (PR-37-9) into the XBee socket and insure the pins are aligned
  4. Connect the RS-485 to the RS-485 wiring coming out of the Ethernet to RS-485 Bridge
    • Refer to for wiring diagrams
  5. Place the Jumpers on the RS-485 modules as outlined in the guide linked above
  6. Power up the board
  7. Open a TCP socket to the Ethernet to RS-485 Bridge (default port 2101)
  8. Send the command 254 252 x as bytes in the NCD API where x is the E3C number of the board.
    • The NCD API is outlined at
  9. Send the command 254 33 wrapped in the NCD API.
  10. The device should respond 170 01 85 00

Configure the Ethernet to RS-485 Adapter

The ethernet module used on this board is a highly configurable device. We are going to be covering the settings necessary to communicate to the RS-485 network. Full guide is available at

  1. Connect the the Adapter to your Ethernet Network and power up the Adapter
  2. Go the the IP address of the Ethernet module in your browser
    • Base Station can be used to quickly find this device if no static IP address is allocated. See ethernet guide referenced above
  3. Select “Serial Settings” on the left
  4. Change the “Baud Rate” field under “Port Settings” to 57600
  5. Click the “OK” button at the bottom
  6. Click “Apply Settings” on the left
  7. Once the configuration is complete as indicated on the web browser, power cycle the Ethernet to RS-485 Adapter

Controlling the Device

Software will need to target individual IP addresses via a TCP socket to control a specific RS-485 network.

Individual devices on the RS-485 network can be targeted using the command 254 252 x where x is the E3C number assigned to the device. This command must be wrapped in the NCD API as outlined

Once targeted the controller will respond to the basic ProXR command set: