BSR-200 switching relay 2-way REG i2Audio light gray. Switching relay for intercom according to DIN EN 50486 in i2Audio technology. DIN rail mounted device with 2 potential-free relays for subscriber-related switching functions. Addressable for one/two subscribers or a subscriber group (max. 16). Switching functions: door opener button, I/O button, door call, video control and LED control display. DREHFIX function: One-man commissioning through addressing with rotary coding switch.