ABB S800-AUX/ALT combined auxiliary and signaling contact

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ABB S800-AUX/ALT Auxiliary & Signaling Contact 

Product Description

The ABB S800-AUX/ALT is a combined auxiliary and signaling contact block designed for the ABB S800 series of modular I/O systems. It provides additional switching capacity for monitoring and control applications in industrial automation, typically used alongside circuit breakers, contactors, or relays.

Key features include:

• 2 normally closed (NC) + 2 normally open (NO) contacts for flexible circuit control .

• DIN rail mounting for easy installation in control panels .

• High reliability with a mechanical life of 10 million operations and electrical endurance of 450,000 cycles (AC-3 load)3.

Technical Specifications

Key Features & Advantages

1. Versatile Switching – Supports both AC and DC loads, making it suitable for diverse applications.

2. Compact Design – Only 9mm wide, saving space in control cabinets .

3. High Durability – Silver-alloy contacts ensure long service life even under frequent switching .

4. Easy Integration – Compatible with ABB S800 I/O modules (e.g., TU810, TU811 bases) .

5. Safety Compliance – Meets industrial safety standards for reliable operation .

Applications

• Motor Control Circuits – Monitoring contactor status in industrial machines .

• Power Distribution Systems – Signaling for circuit breakers in switchgear .

• Process Automation – Used in ABB 800xA DCS for remote I/O expansion .

• HVAC & Building Automation – Controlling relays in ventilation systems .

Usage & Installation Notes

• Wiring – Follow the terminal designations (e.g., A1/A2 for coil connections) .

• Environmental Conditions – Avoid installation in highly humid or corrosive environments .

• Maintenance – Periodically check contact wear and terminal tightness.

• Compatibility – Ensure proper alignment with ABB S800 series components (e.g., DI811, DO820 modules).

The structure and details of the product：

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