Description

Elevator Encoder DTRE-1024PWA
Usage, Replacement Cycle & Maintenance Guide
by Nanjing Zhuye Elevatorparts

Introduction
The DTRE-1024PWA is a hollow-shaft, high-resolution encoder that delivers real-time speed and position feedback to elevator door operators and traction machines. Manufactured and distributed worldwide by Nanjing Zhuye Elevatorparts, this IP65-rated unit meets EN 81-20/50 and ASME A17.1 accuracy requirements, ensuring smooth door motion, precise stopping, and reliable safety-chain feedback. This 800-word guide covers correct installation, daily operation, and the recommended replacement cycle to keep every elevator running safely and efficiently.

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1. Product Highlights
– Resolution: 1,024 PPR (A/B/Z differential)
– Shaft: Ø12 mm hollow, self-centering, stainless steel
– Supply: 5 V ±5 %, <120 mA, short-circuit protected
– Output: RS-422 line driver, 100 m cable length
– Environmental: IP65 ABS housing, -20 °C to +70 °C
– Life: 10^8 revolutions, vibration 20 g, shock 100 g

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2. Installation Method
Step 1 – Preparation
De-energise the elevator system; lock-out/tag-out and verify zero energy. Record serial number and PPR value from the label.

Step 2 – Mounting
Slide encoder onto motor stub shaft until flush. Tighten clamping screws diagonally to 0.8 N·m; ensure <0.05 mm run-out. Position anti-rotation tab in 3 × 3 mm slot.

Step 3 – Wiring
Route shielded CAT5e cable through PG9 gland. Connect A, A̅, B, B̅, Z, Z̅, 0 V, +5 V. Earth shield at controller only; maintain 30 mm untwisted inside enclosure.

Step 4 – Commissioning
Power-up controller; verify 1,024 PPR at rated speed (±0.1 %). Test door open/close 10×; encoder must not exceed 45 °C. Log settings and date.

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3. Daily & Preventive Maintenance
Daily (Technician)
Visual check—LED green, no abnormal clicking. Ensure cable gland tight.

Monthly
Clean housing and lens with dry cloth. Check gland tightness and cable insulation.

Quarterly
Measure supply voltage (5 V ±0.25 V) and differential signal (>2 V). Scope test: rise/fall <100 ns, noise <200 mV.

Annually
Replace encoder if cumulative operating hours exceed 50,000 h. Perform full door speed and stopping accuracy test.

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4. Replacement Cycle & Indicators
| Duty Cycle | Replace Every | Revolutions | Warning Signs |
| Standard residential | 8–10 years | 80 M | Pulse dropout, speed drift >1 % |
| Commercial / hospital | 5–7 years | 50 M | Over-temp >70 °C, vibration >2 g |
| High-speed / freight | 3–5 years | 30 M | Shaft run-out >0.1 mm, LED fault |

Replace immediately if:
– Resolution drops or missing pulses >5 %
– Cable fatigue, shield breakage, or connector corrosion
– Repeated “encoder fault” alarms without mechanical cause
– Physical impact or water ingress (IP65 compromised)

Maintain one spare DTRE-1024PWA per 20 elevators for <4-hour response.

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5. Why Choose Nanjing Zhuye Elevatorparts?
• Full traceability – laser-etched serial and QR code on every encoder
• Same-day global dispatch via DHL/FedEx Express
• 24/7 multilingual hotline and on-site training
• Competitive tiered pricing and custom resolutions for OEM projects

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6. Conclusion
The DTRE-1024PWA encoder is the “pulse of precision” for elevator motion. By following the installation, testing, and replacement guidelines—and sourcing only from Nanjing Zhuye Elevatorparts—you guarantee code compliance, reduce downtime, and ensure every elevator stops exactly where it should.