Wireless 2-fold transmitter module. With internal antenna. No standby loss. For installation. 45mm long, 45mm wide, 18mm deep. The wireless transmitter module FSM61-UC has two channels and can transmit wireless pushbutton telegrams to the Eltako building wireless system. A1 initiates a wireless telegram, such as Press top rocker for a wireless pushbutton with one rocker and A3 such as Press bottom rocker. The telegram on opening the two control contacts is identical to Release wireless pushbutton. Severel wireless transmitter modules must not be switched at the same time. The universal control voltage at +An/-A2 processes control commands of 8 to 253V AC or 10 to 230V DC with periods lasting min. 0.2 seconds. Max. parallel capacitance (approx. length) of control lead at 230V 5nF. This correspond to a length of approx. 20 meters. If the terminals A1 and A3 are connected with a bridge, the wireless telegram is transmitted once per minute by A3, provided the control voltage is applied, e.g. for central commands with priority. No permanent power supply required, therefore no standby losses. The rotary switch is required for the activation or deactivation of encryption and is set to AUTO in operation. Activate encryption: Turn the rotary switch to the right stop (position key) and press once. Deactivate encryption: Turn the rotary switch to the left stop (position crossed out key) and press once.