Description

Elevator Car Communication Board YTCOBB02 – Usage, Replacement Cycle & Maintenance Guide
By Nanjing Zhuye Elevatorparts

Introduction
The YTCOBB02 car communication board is the central nervous system of modern elevator cabins. Manufactured and distributed worldwide by Nanjing Zhuye Elevatorparts, this IP54-rated unit meets EN 81-20/50, ASME A17.1 and UL standards, delivering reliable voice, data, and multimedia communication between the car and machine room.

1. Product Highlights
– Interface: RS-485, CANopen, optional Ethernet
– Power: 24 V DC ±10 %, <8 W
– Audio: 2-way voice, noise-cancelling microphone
– Data: Real-time speed, position, fault logs
– Rating: IP54 ABS, anti-UV, -20 °C to +70 °C
– Life: 100,000 h @ 40 °C, 70 % load

2. Installation Method
Step 1 – Preparation
De-energise the car control cabinet; lock-out/tag-out and verify zero energy. Record serial number and firmware version.

Step 2 – Mounting
Position board on car-top control box, 100 mm clearance for airflow. Use M4 screws (torque 1.2 N·m); ensure IP54 gasket seated.

Step 3 – Wiring
– Power: 24 V DC to X1 terminals
– Comm: RS-485 A/B to machine room
– Audio: Shielded pair to microphone/speaker
– Earth: ≥2.5 mm² PE conductor
Maintain 50 mm separation from power cables.

Step 4 – Commissioning
Power-up; LED green. Upload firmware via service tool. Test 2-way voice, data transmission, fault log download. Log parameters and date.

3. Daily & Preventive Maintenance
Daily (Technician)
Visual check – LED green, no fault codes, temperature <70 °C.

Monthly
Clean IP54 grille; check M4 screws tight. Measure 24 V rail (±1 V).

Quarterly
Download fault log; check comm response <5 ms. Cycle emergency stop 50×.

Annually
Replace capacitors every 5 years. Full load test at 150 % rated current for 10 s.

4. Replacement Cycle & Indicators
| Duty Cycle | Replace Every | Hours | Warning Signs |
| Standard residential | 8–10 years | 80k | LED amber, >70 °C case |
| Commercial / hospital | 5–7 years | 60k | Fault codes, >15 W draw |
| High-speed / outdoor | 3–5 years | 40k | Capacitor bulging, IP54 failure |

Replace immediately if:
– Repeated “comm fault” or “audio fault”
– Physical damage or water ingress (IP54 compromised)
– Temperature >70 °C during normal operation

Maintain one spare **YTCOBB02** per 20 cars for <4-hour response.

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

6. Conclusion
The YTCOBB02 communication board is the “voice and data lifeline” of every elevator. By following the installation, testing, and replacement guidelines—and sourcing only from Nanjing Zhuye Elevatorparts—you guarantee code compliance, reduce downtime, and ensure every passenger is heard and helped during every ride.