Description

Weco Light Curtain WECO-917B71-AC220 917B61 Door Sensor Brief Introduction

1. Full Supply Chain For Otis, Kone, Schindler, Mitsubishi, Thyssenkrupp Elevator Lift  and Escalator All Brand Spare Parts

2. 100% Original New with a one-year free Guarantee.

3. Fast Delivery

4. Huge Customer From European

1. What WECO-917B71-AC220 Really Is

• 71 infrared diodes across 2,057 mm active height, 30 mm beam spacing
• 71 receiver phototransistors with automatic gain control (AGC) for dust compensation
• Supply: 220 V AC ±10 %, 50/60 Hz; current draw 42 mA standby, 75 mA during scan
• Response time <10 ms (beam blocked to relay open)
• Output: 2 × normally-open safety relays, 3 A 250 VAC, gold-plated contacts
• IP54 front plate, -25 °C to +70 °C operating range, 95 % RH non-condensing
• Plug-in WAGO terminals (6-way) for fast swap without re-wiring

2. Where It Is Used

• Otis, Thyssen, KONE, Schindler passenger elevators 800–1,100 mm clear opening
• Machine-room-less (MRL) or machine-room (MR) installations
• New build or modernisation — one part number fits all door mechanics
• Ideal for sites where 24 VDC supply is limited; uses existing 220 V AC door transformer

3. Installation – 10-Minute Alignment

1. Remove old curtain – undo two M4 screws per end; unplug 6-way WAGO connector.
2. Clean header surface – remove grease and carbon; check straightness <1 mm.
3. Mount new set – slide 917B71 into existing 20 × 5 mm T-slot; torque screws 1.2 N·m.
4. Connect plug – brown L, blue N, white/red NO contacts to door controller; earth shield at car top only.

   

   

   

   

5. Power on – green LED flashes fast for 2 s while AGC calibrates, then steady green = all 71 beams OK.
6. Beam test – pass a 5 mm dowel across the opening; relay must open within 10 ms and close immediately when removed.
7. Final check – run door on inspection; curtain must allow close to within 50 mm then re-open on dowel intrusion.

4. Daily Operation – What the Curtain Actually Does

• Scans 71 beams every 4 ms; AGC compensates for 30 % dust degradation
• LED intensity drops to 70 % at end-of-life (≈ 50,000 h), then yellow LED warns
• Built-in test pulse every 24 h — if three consecutive pulses fail, relay opens and “Curtain Fault” is logged
• IP54 gasket resists car-wash water jets; UV-stabilised polycarbonate prevents yellowing

5. Replacement Cycle & Preventive Maintenance

• High-traffic office (>1,500 door cycles day⁻¹) – wipe lenses every 3 months, replace curtain every 5 years
• Residential tower (400–800 cycles day⁻¹) – clean every 6 months, replace every 8 years
• Low-rise freight (≤200 cycles day⁻¹) – inspect annually, replace every 10 years

• Yellow LED remains on after cleaning
• Response time >20 ms (tested with 5 mm rod)
• Relay contacts >100 mΩ at 1 A
• Lens cracked or beam count <68 (built-in diagnostic)
• Water ingress (fog inside lens)

6. Extending Life – 3 Pro Tips

1. Keep lens face vertical; horizontal mounting collects dust 3× faster
2. Clean with 70 % isopropyl, not ammonia glass spray — prevents crazing
3. Check header alignment every 6 months; 2 mm offset reduces beam power by 40 %

7. Why Buy WECO-917B71-AC220 from Nanjing Zhuye Elevator Parts?

• Factory-new, not refurbished; passes 4-hour burn-in at 60 °C and 1,000-cycle beam test
• Pre-calibrated; matches WECO original beam map, no re-alignment required
• Anti-static foam box + silica gel — safe for air freight
• Dual stock: 520 pairs Nanjing, 180 pairs Dubai — next-day delivery to 65 countries
• Bundle kit: curtain + 3 m flying lead + cleaning wipe — 5 % discount
• 24 months warranty, return & replace, no factory RMA wait
• 7×24 WhatsApp/WeChat video support; average response 10 minutes

Conclusion