Switching actuator shading elements and roller shutters with 2 channels for two 230V motors. 2+2 normally open contacts 4A/250V AC, isolated from the supply voltage 12V. Bidirectional. Stand-by loss only 0.1 watt. Series installation device for mounting on mounting rail. Connection to the Eltako RS485 bus. Cross-wiring bus and power supply with jumper. Contact switching in zero crossing to protect the contacts and motors. A motor is connected to 1, 2 and N, a second motor may be connected to 3, 4 and N. If both relays of the FSB14 are switched on, 0.4 watts are required. If the supply voltage fails, it is switched off in a defined way. The buttons can be programd either as a direction button or as a universal button: Local control with universal button: With each pulse, the switch position changes in the order, stop, stop, stop. Local control with direction button: The switching position is activated in a targeted manner with a key pulse at the top. The switching position is activated