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ABB CM-KH-3 (1SVR450056R6000) Auxiliary Contactor Module  

1. Key Parameters

• Product Model: CM-KH-3
• Order Code: 1SVR450056R6000
• Product Series: ABB CM-Series Auxiliary Contact Modules (Snap-On Type, 1~4 Contacts, NO/NC Configurations)
• Core Function: Extends ABB main contactors/MCBs with 3 normally open (NO) auxiliary contacts; transmits low-current control/status signals (e.g., "main device energized," "fault status"); enables remote monitoring/control of main electrical devices; integrates with PLC/HMI systems for signal feedback
• Electrical Specifications:

  Parameter	Details	Performance Metrics
  Contact Configuration	- Contact Type: 3× Normally Open (NO) (closes when main device is energized/tripped) - Contact Arrangement: Independent, parallel circuits (each contact operates synchronously with main device)	Supports 3 separate signal paths (e.g., "contactor ON" to PLC, "status" to HMI, "alarm" to indicator light)
  Contact Ratings	- Rated Current (Iₑ): 6A (AC-15, 230V AC); 3A (DC-13, 24V DC) - Rated Voltage (Uₑ): 230V AC (50/60Hz); 24V DC - Breaking Capacity: 6A (AC-15, 230V AC); 3A (DC-13, 24V DC) - Making Capacity: 12A (AC-15); 6A (DC-13)	Handles low-current control signals (typical PLC/HMI input current: 0.1~1A) without contact overheating
  Electrical Endurance	- Mechanical Life: 10 million cycles (independent of main device life) - Electrical Life: 100,000 cycles (at AC-15, 6A 230V AC); 50,000 cycles (at DC-13, 3A 24V DC)	Ensures 8+ years of reliable signal transmission (assuming 100 cycles/day in industrial use)
  Insulation Performance	- Insulation Resistance: ≥100MΩ (500V DC, between contacts and ground) - Dielectric Strength: 2kVrms (1min, between contacts; 1.5kVrms between contacts and ground)	Withstands voltage spikes (e.g., control circuit surges) without insulation breakdown or signal interference
  Control Signal Sync	- Operation Delay: ≤10ms (contacts close/open synchronously with main device) - Contact Bounce: ≤1ms (at rated current)	Ensures real-time signal feedback (critical for PLC-based control loops requiring fast response)

• Mechanical Specifications:
  • Housing Material: Flame-retardant thermoplastic (UL94 V-0); Arc-resistant design (prevents contact arc escape)
  • Dimensions (W×H×D): 18mm × 85mm × 45mm (slim width for dense control panels; matches ABB CM-series contactor/MCB height)
  • Mounting: Snap-on installation (no tools required) onto ABB CM-series contactors (CM10~CM63) and S200-series MCBs (S201~S204); Secure via built-in locking clips (prevents vibration-induced dislodgment)
  • Weight: Approximately 30g
  • Terminals: 6× screw terminals (2 per NO contact: input + output); Accepts wire sizes: 0.5mm²~2.5mm² (solid/stranded copper wire); Terminal torque: 0.8 N·m
  • Operating Mechanism: Mechanical linkage (syncs with main device’s contact movement); No external power required (passive signal transmission)
• Environmental Ratings:
  • Operating Temperature Range: -25℃~+60℃ (-13℉~140℉)
  • Storage Temperature Range: -40℃~+85℃ (-40℉~185℉)
  • Humidity Tolerance: ≤95% RH (non-condensing, 40℃; suitable for damp industrial/commercial environments)
  • Vibration Resistance: 10~500Hz, 1g acceleration (IEC 60068-2-6; No contact bounce or linkage displacement)
  • Shock Resistance: 15g acceleration (11ms duration, IEC 60068-2-27; Maintains contact alignment and signal sync)
• Compliance Standards: IEC 60947-5-1 (auxiliary contactors), EN 60947-5-1, UL 508 (industrial control), CE, RoHS, CSA C22.2 No. 14 (Canadian safety)

2. Key Features

• ABB Device Exclusive Compatibility: Designed to snap onto ABB CM-series contactors (CM10~CM63) and S200-series MCBs—no custom adapters required; Mechanical linkage ensures 100% sync with main device operation (e.g., contacts close exactly when the main contactor energizes), avoiding signal delay or mismatch common with generic auxiliary modules.
• 3 Normally Open (NO) Contacts for Multi-Signal Use: 3 independent NO contacts support simultaneous signal transmission to multiple systems—e.g., one contact sends "contactor ON" to a PLC, another sends "status" to an HMI, and the third triggers a green indicator light; Eliminates the need for multiple single-contact modules, saving panel space.
• Tool-Free Snap-On Installation: Built-in locking clips enable one-handed installation onto ABB main devices (≤10s per module)—cuts installation time by 70% compared to bolt-mounted auxiliary contacts; No wiring modifications to the main device, reducing the risk of installation errors (e.g., incorrect terminal connections).
• Low-Current, High-Endurance Contact Design: 6A AC/3A DC contact ratings match typical PLC/HMI signal requirements (0.1~1A); 10 million mechanical cycles ensure long-term reliability—ideal for high-cycle applications (e.g., HVAC compressors with 100+ daily on/off cycles) where generic modules fail prematurely.
• Slim 18mm Width for Space Optimization: Compact design matches the width of ABB CM-series contactors/S200-series MCBs—enables side-by-side installation of multiple modules (e.g., 2 CM-KH-3 modules on a single CM25 contactor for 6 NO contacts) in dense control panels, reducing cabinet size by 40%.
• Flame-Retardant & Arc-Resistant Housing: UL94 V-0 thermoplastic resists ignition and flame spread (critical for enclosed control cabinets), while arc-resistant design contains contact arcs (minimizing interference with nearby sensitive electronics, e.g., PLC input cards).
• Passive Operation (No External Power): No external power supply required—contacts operate via mechanical linkage to the main device; Eliminates wiring for auxiliary power and reduces points of failure (e.g., power supply faults), enhancing system reliability.

3. Application Fields

• Industrial Contactor Signal Extension: Primary application—extending ABB CM-series contactors:
  • Motor Control Panels: Mounted on CM25 contactors (controlling 7.5kW motors) in manufacturing workshops; 3 NO contacts transmit: (1) "motor running" to a plant PLC, (2) "contactor energized" to an HMI status screen, (3) "normal operation" to a green indicator light; Enables remote monitoring of motor status without opening the control panel.
  • HVAC Compressor Control: Integrated with CM16 contactors (controlling 3kW HVAC compressors) in commercial buildings; One NO contact sends "compressor ON" to the building management system (BMS) for energy tracking, while another triggers a fault alarm if the contactor fails to energize (via PLC logic).
• MCB Status Monitoring: Extending ABB S200-series MCBs for fault tracking:
  • Residential Distribution Boards: Snap-mounted on S202M-C10 MCBs (protecting kitchen circuits); A NO contact connects to a home automation system—sends a smartphone alert if the MCB trips (e.g., from an overloaded toaster), allowing remote fault notification.
  • Industrial Control Circuits: Mounted on S203-C16 MCBs (protecting PLC power circuits); A NO contact feeds a "circuit healthy" signal to the PLC—if the MCB trips (e.g., short circuit), the PLC triggers an emergency stop for connected machinery, preventing damage.
• Automation & Alarm Systems: Signal transmission for control loops:
  • Conveyor Belt Control: Paired with CM32 contactors (controlling 11kW conveyor motors) in warehouses; One NO contact syncs with a photoelectric sensor—signals the PLC to stop the conveyor when a package jams (by breaking the NO contact circuit), while another contact triggers an audible alarm.
  • Fire Safety Systems: Integrated with CM10 contactors (controlling fire dampers) in commercial buildings; A NO contact sends "damper open" status to the fire alarm panel—if the contactor de-energizes (damper closes), the panel alerts firefighters to the damper’s position.
• Commercial Equipment Control: Signal feedback for critical devices:
  • Elevator Control Panels: Mounted on CM20 contactors (controlling elevator door motors); A NO contact transmits "door closed" status to the elevator controller—prevents the elevator from moving until the contact confirms the door is sealed, enhancing passenger safety.
  • Retail Refrigeration: Paired with CM12 contactors (controlling 2kW refrigeration compressors); A NO contact connects to a temperature monitoring system—if the contactor fails to energize (compressor off), the system alerts staff to rising fridge temperatures, preventing food spoilage.

4. Precautions

• Device Compatibility (Critical): Use exclusively with ABB CM-series contactors (CM10~CM63) and S200-series MCBs (S201~S204)—Never install on non-ABB devices (e.g., Siemens contactors, Rockwell MCBs); Incompatible mounting rails will prevent proper mechanical linkage, causing contact sync failure (e.g., contacts not closing when the main device energizes). Verify main device model against module specifications.
• Installation & Wiring:
  • Main Device Power Off: Disconnect power to the main contactor/MCB before installing the module—Live terminals on the main device pose shock risks; Use insulated tools and lockout/tagout procedures.
  • Snap-On Alignment: Align the module’s locking clips with the main device’s mounting rails before pressing—Misalignment breaks the clips or damages the main device’s linkage; Ensure the module sits flush with the main device (no gaps) to maintain contact sync.
  • Terminal Wiring: Use wire sizes 0.5mm²~2.5mm² (exceeding 2.5mm² damages terminals); Tighten terminals to 0.8 N·m—Under-tightening causes high contact resistance (signal dropouts), while over-tightening strips terminal threads (loose connections over time). Label wires to avoid cross-connection (e.g., mixing up "PLC signal" and "indicator light" wires).
• Operation & Maintenance:
  • Contact Sync Testing: After installation, test the module by energizing/de-energizing the main device—Use a multimeter to confirm NO contacts close/open synchronously (≤10ms delay); Asynchronous operation indicates misalignment, requiring module re-installation.
  • Cleaning & Inspection: Inspect terminals quarterly for dust/corrosion (especially in damp environments); Clean with a dry brush (never use water or solvents)—Corroded terminals cause intermittent signals (e.g., false "fault" alerts to the PLC).
• Environmental Limitations:
  • Temperature & Humidity: Do not operate above +60℃ or in condensing humidity—High temperatures (>60℃) degrade contact materials (increasing resistance), while condensation causes terminal corrosion (signal interruptions); Install control cabinets with air conditioning/dehumidifiers in harsh environments.
  • Vibration & Shock: Avoid mounting the main device/module near high-vibration equipment (e.g., large motors)—Excessive vibration (＞1g) causes contact bounce (erratic signals to the PLC); Use vibration dampeners for the control cabinet if needed.
• Replacement & Lifespan:
  • End-of-Life Indicators: Replace the module if: (1) contacts fail to close/open (confirmed via multimeter), (2) terminals are corroded/damaged, (3) mechanical linkage is broken (module wobbles on the main device); Aged modules (＞8 years) lose contact endurance, leading to signal delays or failures.
  • Genuine ABB Replacements: Replace with identical ABB CM-KH-3 modules—Non-genuine modules have mismatched contact ratings (e.g., 3A AC instead of 6A AC) or poor sync accuracy, causing PLC/HMI signal errors (e.g., false "motor running" alerts)

The structure and details of the product：

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