For power supply of control devices and actuating drives. The switch impulse of the room temperature controller are individually passed to the actuating drives. Plastic body, white RAL 9010, with integrated fuse 4 A, over voltage protection for actuating drives, pump connection with earthed conductor and temperature limiter, pump logistics as needed (24 V or 230 V) with volt-free contacts available as accessories. Electrical connections with screw clamps max. 1.5 mm².