Overview
The Siemens 3RH7921-1JA11 is a high-quality auxiliary contact block designed for seamless integration with Siemens 3RT contactors, specifically for size S3. This essential component provides an additional 1 normally open (NO) and 1 normally closed (NC) contact, offering enhanced control and signaling capabilities within your electrical circuits. Its lateral mounting design and compact size make it an ideal solution for optimizing space in control panels.
Features
- Configuration: 1 Normally Open (NO) + 1 Normally Closed (NC) contact.
- Mounting: Lateral, second-level, and 10 mm spacing for size S3 contactors.
- Terminal Type: Screw terminals for secure and reliable wiring.
- Compatibility: Specifically engineered for use with Siemens 3RT contactors, size S3.
- Application: Ideal for use in control circuits for signaling, interlocking, and other auxiliary functions.
Benefit
- Increased Functionality: Expands the number of available contacts on your contactor, allowing for more complex control schemes.
- Space-Saving Design: Its lateral mounting minimizes the footprint within your control panel, helping to create a more organized and efficient layout.
- Reliable Performance: Built with Siemens' renowned quality and durability, ensuring long-lasting and consistent operation.
- Easy Installation: The intuitive design and screw terminals simplify the mounting and wiring process, reducing installation time.
- Enhanced Safety: Provides reliable signaling for safety and interlocking circuits, contributing to a safer operational environment.
Function
- Signaling: Used to indicate the status of the main contactor (e.g., "ON" or "OFF").
- Interlocking: Prevents unintended operation of other devices by providing a control signal based on the contactor's state.
- Auxiliary Control: Supplies control signals for other components in the system, such as indicator lights, relays, or PLC inputs.
Technical Specification
- Product Number: 3RH7921-1JA11
- Manufacturer: Siemens
- Contact Configuration: 1 NO + 1 NC
- Mounting Type: Lateral, second-level, 10 mm spacing
- Terminal Type: Screw terminals
- Contactor Size Compatibility: S3
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