Siemens3RH2911-1FB11 Auxiliary switch block

The Siemens 3RH2911-1FB11 is a convenient auxiliary switch block that can be mounted on the front of Siemens 3RT2 contactors and 3RH2 relays. This auxiliary switch block is equipped with one normally open (1NO) contact and one normally closed (1NC) contact, allowing you to easily monitor the status of the contactor or relay. The screw terminals ensure a reliable and easy connection. An important feature is that the 1NO contact is "leading" and the 1NC contact is "lagging," which can be relevant in certain safety circuits. Keywords: Siemens, 3RH2911-1FB11, auxiliary switch, auxiliary contact block, contactor, relay, 3RT2, 3RH2, 1NO, 1NC, screw terminal, front mounting, switching device, control.