Heating cooling relay, 1+1 normally open contact potential-free 4A/250V AC, with DX technology. Bidirectional. Stand-by loss only 0.1 watt. Connection to the Eltako RS485 bus. Cross-wiring bus and power supply with jumper. To do this, simply connect the N conductor to the terminals (N1) and L to 1(L) and/or N to (N2) and L to 3(L). This results in an additional standby loss of only 0.1 watt. If both relays of the FHK14 are switched on, 0.4 watts are required. If the supply voltage fails, it is switched off in a defined way. This heating-cooling relay evaluates the information from radio temperature controllers or sensors. Window-door contacts, motion detectors, window-grip sensor FFG7B-rw and radio button may be added. As an alternative to a radio temperature controller, the temperature information about setpoint and actual values can also be obtained from the GFVS software. Furthermore, the GFVS software can be used to set the target temperature and thus restrict the setting range of