Siemens Auxiliary Contact Block - 0 NO/4 NC - 3RH2911-2FA22

This block provides 4 normally closed (NC) contacts that can be used for signaling, interlocking, or safety functions within an industrial control system.

It is rated for AC-15 applications with a rated operational current of 6A at 230V. This is suitable for controlling pilot devices, relays, and small solenoid valves.

It is designed for front mounting onto compatible Siemens 3RH and 3RT series contactors or motor starters.

Spring clamp terminals use a spring mechanism to secure the wire, offering a tool-free connection that is generally more resistant to vibration than screw terminals.

No, this specific model (3RH2911-2FA22) only provides normally closed (NC) contacts. For normally open contacts, a different auxiliary contact block configuration would be required.

The operating temperature range for this auxiliary contact block is -25°C to +60°C.

This block is designed for the 3RH and 3RT series. Compatibility with older series should be verified with Siemens documentation, as specific mounting interfaces may differ.

Ensure the main contactor or motor starter is properly energized and the auxiliary block is correctly mounted and wired. Verify that the control circuit voltage matches the block's rating. Check for any physical obstruction or damage to the contacts.

Release the wire from the spring clamp terminal, re-strip the wire end if necessary, and re-insert it firmly into the terminal. Ensure the correct wire gauge is used for the terminal type.

Confirm that the auxiliary contact block is intended for the specific Siemens 3RH or 3RT series device you are using. Check for any obstructions on the mounting surface of the main device.