Product Overview

The Allen-Bradley 100S-F (Bulletin 100S) provides a dedicated safety switching solution for high-integrity control circuits. Unlike general-purpose contactors, the 100S-F incorporates positively guided auxiliary contacts that meet strict EN 50205 requirements. This mechanical linkage ensures that if a main power contact welds, the N.C. auxiliary contact remains open, providing a reliable feedback signal to the safety monitoring relay. We supply this product as 100% Brand New and Original, ensuring your safety systems maintain compliance with global Category 4 and SIL 3 standards.

Technical Specifications

The 100S-F series handles high-current motor loads while maintaining millisecond-level precision in auxiliary feedback.

Engineering Advantages

• Forced-Guided Feedback: The 100S-F guarantees that the auxiliary contacts track the state of the main power poles. This mechanical constraint prevents the auxiliary contacts from changing state if any main contact remains welded, enabling the safety system to detect a component failure immediately.

• High-Visibility Safety Housing: The contactor features a distinct red safety housing. This color-coding allows maintenance personnel to distinguish safety-related hardware from standard control components at a glance, reducing the risk of accidental bypass during service.

• Permanent Factory-Fixed Auxiliaries: Rockwell Automation permanently attaches the auxiliary contact block to the 100S-F base. This design prevents unauthorized removal or tampering, ensuring the safety circuit logic remains intact as originally engineered.

• Mirror Contact Compliance: The module meets IEC 60947-4-1 mirror contact requirements. This ensures the N.C. auxiliary contact stays open as long as any N.O. main pole is closed, a critical requirement for redundant safety monitoring.

FAQs

Q: Can I remove the auxiliary contact block to save space?

A: No. The 100S-F GuardMaster series features a factory-installed, non-removable auxiliary contact block. This permanent assembly ensures the safety rating (SIL 3/Cat 4) remains valid and prevents field modifications that could compromise the safety circuit.

Q: Does the 100S-F include built-in surge suppression?

A: Many DC-coil versions of the 100S-F include integrated surge suppressors. For AC-coil versions, we recommend adding a compatible varistor or RC-link module to protect your safety relay outputs from inductive kickback.

Q: How does this contactor contribute to a Category 4 safety system?

A: In a Category 4 system, the safety relay monitors the N.C. auxiliary contact of the 100S-F through a feedback loop. If the contactor fails to open due to a welded pole, the auxiliary contact remains open, preventing the safety relay from resetting and ensuring the machine stays in a safe state.

Q: What is the maximum voltage rating for the auxiliary contacts?

A: The auxiliary contacts are rated for 10A at up to 690V AC, following IEC/EN standards. However, most safety applications utilize them in 24V DC control loops for interfacing with safety controllers.