Wiren Board 6: RS485-ISO extension module (WBE2-I-RS485-ISO)
Module with galvanically isolated RS-485 interface. Insulation voltage: 1.5 kV. Speed up to 1 Mbit/s.
Module contains 120 Ohm terminator between lines A and B. To enable it, close the jumper between termination contacts on the top edge of the board.
Pinout
RS485 signals are output to the terminals of the O1-O3 extension module.
Terminal | Function |
---|---|
O1 | A (D+) |
O2 | B (D-) |
O3 | Isolated GND (Common, C) |
Configuration
Configuration is done in the web interface. Section Configs => Hardware Modules Configuration. Next, in Internal slot 1 or in Internal slot 2, select "WBE2-I-RS485-ISO: Isolated RS-485 interface module" and click Save.
The device is detected immediately, no reboot is required.
Operation
The port is available in the system as
- /dev/ttyMOD1 - when installed in the first slot for extension module (MOD1)
- /dev/ttyMOD2 - when installed in the second slot for extension module (MOD2)
For operation, you must disable hardware flow control. Additional port configuration as RS-485 is not required.