3RH2911-2FB22
The Siemens SIRIUS 3RH2911-2FB22 is a pre-positioned auxiliary switch with identification code 11 U. It has 2 normally open and 2 normally closed (2 NO + 2 NC) contacts, including 1 set of pilot normally open and 1 set of delayed normally closed contacts. It is connected to spring terminals and is suitable for 3RT2 contactors and 3RH2 contact relays to meet the timing interlocking requirements.
Product Positioning
The 3RH2911-2FB22 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 action needs to be confirmed.
Core Product Advantages and Features
Leader/Delay Contact
It contains one set of pilot normally open contacts and one set of delayed normally closed contacts, which can provide clear timing signals before and after the main contact operation.
Identification code 11 U
The contact configuration is indicated by the identification code 11 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.
Spring terminal connection
Spring terminals eliminate the need for screws, are vibration-resistant, save time on wiring, and are suitable for heavy wiring and equipment vibration environments.