Description

Elevator Contact Switch ZB2-BE101C
Usage, Replacement Cycle & Maintenance Guide
By Nanjing Zhuye Elevatorparts

Introduction
The ZB2-BE101C is a high-reliability, positive-break contact switch engineered for elevator safety chains, door circuits and control logic. Manufactured and distributed worldwide by Nanjing Zhuye Elevatorparts, this IP65-rated device meets EN 81-20/50, ASME A17.1 and UL standards, delivering over 1 million electrical cycles. The following 800-word guide explains correct installation, daily operation, and the recommended replacement cycle to keep every lift running safely and efficiently.

1. Product Highlights
• 1 NO + 1 NC snap-action contacts, 10 A @ 250 V AC
• IP65 ABS housing, -20 °C to +70 °C operating range
• Pre-wired 3 m PUR cable with M12 connector – tool-free hook-up
• Roller lever 17 mm stroke for positive-break actuation
• Compact footprint: 50 × 28 × 16 mm – fits all hoistway brackets
• 1+ million mechanical cycles, vibration 20 g, shock 100 g

2. Installation Method
Step 1 – Preparation
De-energise the lift; lock-out/tag-out main breaker and verify zero energy. Record serial number and mounting position.

Step 2 – Mounting
Position the switch on the hoistway bracket 5 mm before the final limit of car travel (per EN 81-20). Use supplied M5 × 30 mm stainless screws; torque to 8 N·m. Ensure roller lever is perpendicular to the cam plate (±2°).

Step 3 – Wiring
Route 3-core 1.5 mm² shielded cable through the PG7 gland. Connect brown (NO), blue (common), green/yellow (earth) to the safety-chain terminals. Secure strain relief to prevent cable fatigue.

Step 4 – Commissioning
Restore power and cycle the car to the limit position; switch must open within 1 mm. LED on controller must change state; log trip distance and technician signature.

3. Daily & Preventive Maintenance
Daily (Technician)
Visual check—roller and lever must be free of debris. Ensure cable gland is tight and no cracks in housing.

Monthly
Clean roller and cam with 70 % IPA; lubricate pivot sparingly with PTFE spray.

Quarterly
Measure contact resistance (<0.1 Ω) and insulation (>10 MΩ @ 500 V). Cycle the switch 50 times under load to verify snap-action.

Annually
Replace desiccant pack if present. Perform full safety-chain test including governor and door locks.

4. Replacement Cycle & Indicators
Standard Duty: 5–7 years or 250,000 cycles
High-Traffic: 3–4 years or 150,000 cycles
Mandatory Replacement Signs
• Roller wear >1 mm or lever play >3°
• Contact welding or resistance >1 Ω
• Cracks, corrosion, or IP65 seal failure
• Frequent “limit fault” alarms without cam contact

Keep one spare ZB2-BE101C per 15 elevators for <2-hour service turnaround.

5. Why Choose Nanjing Zhuye Elevatorparts?
• Full traceability—laser-etched serial and QR code on every switch.
• Same-day dispatch to 60+ countries via DHL/FedEx Express.
• 24/7 multilingual hotline and on-site training.
• Competitive tiered pricing and custom cable lengths for OEM projects.

6. Conclusion
The ZB2-BE101C limit switch is small but mission-critical. By following the installation, testing, and replacement guidelines—and sourcing only from Nanjing Zhuye Elevatorparts—you guarantee code compliance, reduce downtime, and protect every passenger who rides the lift.