Radio 2-way transmitter module. With inner antenna. No standby loss. For panel mounting. 45mm long, 45mm wide, 18mm deep. The FSM61-UC radio transmitter module has two channels and can thus send radio telegrams into the Eltako building radio like a radio button. A1 initiates a radio telegram like pressing the rocker on top of a radio button with a rocker and pressing A3 as rocker on the bottom. The message frame when the two control contacts are opened is identical to that of release the key. Several radio transmission modules must not be controlled at the same time. The universal control voltage at +an/-A2 processes control commands from 8 to 253V AC or 10 to 230V DC with a length of at least 0.2 seconds. Maximum parallel capacity of the control cables for 230V 5nF. This corresponds to a length of approx. 20 meters. If terminals A1 and A3 are connected to a bridge 1x, a radio message frame of A3 is sent per minute as long as the control voltage is present. E.g. for central commands wi