The 20.23.9.024.4000 is a 2-pole Modular Step Relay with DC coil, 20.23 series. Double phase switch 1NO-1NC (SPST-NO+SPST-NC), test button with mechanical indicators. Possible to connect illuminated pushbuttons with the additional part 026.00. AgSnO2, cadmium-free contact. Module for illuminated pushbuttons. 35mm rail (EN 60715) mount.