3RH2911-1FC22
The Siemens SIRIUS 3RH2911-1FC22 is a pre-positioned auxiliary switch with identification code 22 U. It has 2 normally open and 2 normally closed (2 NO + 2 NC) contacts. Both normally open contacts are pilot-operated, and both normally closed contacts are delayed. It uses screw terminal connections and is compatible with 3RT2 contactors and 3RH2 contact relays to meet timing interlocking requirements.
Product Positioning
The 3RH2911-1FC22 is a pilot/delay contact type of the SIRIUS 3RH29 front-mounted auxiliary switch. The contact action sequence is staggered from that of the main contacts, making it suitable for star-delta starting, forward/reverse switching, or interlocking circuits where the order of actions needs to be confirmed.
Core Product Advantages and Features
Leader/Delay Contact
Both normally open contacts are pilot signals, and both normally closed contacts are delay signals, which can provide clear timing signals before and after the main contact operation.
Identification code 22 U
The contact configuration is indicated by the identification code 22 U, which facilitates comparison with the drawings and confirmation of the wiring on site.
Front-mounted snap-fit installation
It snaps directly onto the front of the 3RT2 contactor or 3RH2 contact relay, allowing for quick installation and replacement.
Screw terminal connection
The screw terminals can connect to 0.5-2.5mm² wires, ensuring a secure connection and suiting general control panel wiring and maintenance habits.