Individual room control with 2 channels, 4A/250V, potential-free. Bidirectional. Standby loss only 0.1 watts. Connection to the Eltako RS485 bus. Cross-wiring of bus and power supply with jumper. If both relays are switched on, 0.4 watts are required. The channels can either be taught in together, lower rotary switch in position 1+2, or completely separately in positions 1 or 2. The sensors are first taught in using the rotary switches. If a wireless button is taught in, the assignment of the 4 buttons is fixed. The LED under the upper rotary switch accompanies the teaching process in accordance with the operating instructions and indicates control commands during operation by flashing briefly.