This board is driven by the RS485 based 24VDC powered Fixmebus. The C-language code inside the PIC18F46K22 can enable/disable channels, activate/deactivate relays, activate relays only during a defined time. This slave board answers to ping commands, has an address, password, firmware version, model and device names in its EEPROM. Varistors on relays contacts are advised can be directly soldered on NCx, COMx and NOx pads. There is also 5x 3 positions switches to force channels to ON or OFF.