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ABB CAL19-11 1SFN010820R1011 Auxiliary Contact Block

1. Product Overview

The ABB CAL19-11 1SFN010820R1011 is an industrial-grade auxiliary contact block designed for ABB low-voltage contactors (e.g., AF series, A-line series). It provides additional switching points to transmit status signals (e.g., "contactor on/off") of the main contactor to control systems (PLCs, relays) or alarm circuits, enhancing monitoring and interlocking capabilities in industrial automation environments.

2. Technical Specifications

2.1 Contact Performance
- Contact Configuration: 1 normally open (NO) + 1 normally closed (NC) contact (double-pole, single-throw; flexible for status feedback/interlocking)
- Rated Voltage: 230 V AC / 24 V DC (compatible with standard control system signal levels)
- Rated Current: 6 A (continuous at 230 V AC, resistive load); 3 A (continuous at 24 V DC)
- Breaking Capacity: 6 A (resistive load, 230 V AC); 0.6 A (inductive load, 24 V DC, cosφ=0.4)
- Contact Material: Silver-nickel (AgNi) alloy (high conductivity, anti-arc erosion; ensures long contact life)
2.2 Electrical & Mechanical
- Insulation Voltage: 690 V AC (between contacts and housing; meets low-voltage safety standards)
- Dielectric Strength: 2.5 kV AC (1 minute, between contacts and ground; prevents electrical leakage)
- Mechanical Life: ≥10 million operations (matches main contactor durability; suitable for high-cycle applications)
- Electrical Life: ≥100,000 operations (at rated current/voltage; reduces replacement frequency)
2.3 Environmental & Mounting
- Operating Temperature: -25°C ~ +70°C (adapts to industrial control cabinet environments)
- Storage Temperature: -40°C ~ +85°C
- Protection Degree: IP20 (against finger touch and large dust particles; for indoor cabinet mounting)
- Mounting: Clip-on installation to ABB contactors (no tools required; aligns with contactor’s auxiliary mounting rail and locks with a "click")
3. Application Fields
- Motor Control Systems: Transmits "contactor closed/open" signals to PLCs for motor status monitoring (e.g., conveyor motor, pump motor in manufacturing)
- Industrial Interlocking: Uses NC contact to prevent simultaneous activation of conflicting contactors (e.g., forward/reverse motor control)
- HVAC Automation: Feeds contactor status to building management systems (BMS) for 3-phase fan/compressor monitoring in commercial buildings
- Process Control: Triggers alarms via NO contact when main contactor fails (e.g., in chemical plant pump control circuits)
4. Installation & Maintenance

4.1 Installation
- Align the block’s clip with the auxiliary mounting rail on ABB main contactors (e.g., AF260, A140); push until a "click" confirms secure engagement
- Wire NO/NC contacts to control system inputs: use 0.5-1.5 mm² copper cables; tighten terminal screws to 0.5-0.8 N·m torque (prevents loose connections)
- Verify contact continuity with a multimeter before system startup (NO contact: open when main contactor is off, closed when on; NC contact: opposite)
4.2 Maintenance
- Check contact status quarterly (measure resistance via multimeter; normal resistance <50 mΩ; high resistance indicates contact wear)
- Clean terminal blocks with a dry soft brush (remove dust to avoid poor contact; do not use liquid cleaners)
- Inspect clip connection monthly (ensure no loosening due to vibration; reattach if the block shifts)
- Replace the block if contacts stick, show signs of overheating (discolored terminals), or fail continuity tests (avoids false status signals)

The structure and details of the product：

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