Elevator Five-Party Communication Wiring Diagram and Common Issues

For those who want to install five-party intercom but don’t know how to wire, we have carefully prepared a wiring diagram for five-party communication that guarantees you will understand it at a glance!

What is Elevator Five-Party Communication?

Elevator five-party communication refers to the communication between five parties in the elevator intercom system: the management center host, the elevator car, the elevator machine room extension, the top of the elevator, and the bottom of the elevator shaft. The most closely related communication to the elevator passengers is between the car and the management center host.

What is the Role of Elevator Five-Party Communication?

The role of the elevator emergency alarm device is to allow trapped individuals to quickly and easily contact the outside world when the elevator malfunctions. This is especially important when they do not have a mobile phone or when the mobile phone cannot be used due to lack of signal.

Elevator Five-Party Communication Wiring Diagram and Common Issues

Note: 1. The intercom host in the machine room and the intercom host in the monitoring center are provided by the seller; 2. The wiring from the elevator machine room to the monitoring center (including wires, conduits, and installation works) is the responsibility of the customer according to the building structure dimensions, and the customer must assist the elevator installation unit in completing the installation and debugging of this function; 3. The wiring cable is: PVC jacket shielded flexible cable 0.75mm2 2-core cable, model RVVP2×0.75; 4. This diagram is applicable only to projects with 6 or fewer elevators; 5. The communication line reserved by the monitoring center must have an additional 2 meters of cable after reaching the intercom host; the communication line reserved by the elevator machine room must have an additional 2 meters of cable after reaching the elevator control cabinet; 6. The maximum wiring distance from the elevator machine room to the monitoring center cannot exceed 2 km; 7. For machine-room-less elevators, the control cabinet is generally placed on the top floor; 8. The average internal resistance of a single communication line should not exceed 4Ω per hundred meters; 9. The wiring must meet the following testing requirements.

Insulation Test:

Measure the resistance between the grounding wire and black and white wires at 500V, which should be above 0.02MΩ.

Multimeter:

1. Measure the induced voltage between the black and white wires and the grounding wire in AC voltage mode, which should be within 48V (measured when the elevator system is energized); 2. Measure the voltage between the black and white wires and the grounding wire, as well as between the black and white wires in DC voltage mode, which should be zero; 3. Short-circuit the communication main line of each machine room intercom host and measure the resistance between the black and white wires at the monitoring center, which should be within 120Ω.

10. If the wiring part that the customer is responsible for needs to be entrusted to the seller, the specific plan and price need to be negotiated based on the customer’s actual requirements.

Common Problems and Solutions for Elevator Five-Party Communication

In the actual application of elevator five-party intercom, various faults are inevitable. What are the emergency solutions for faults in elevator five-party intercom? Below is a brief introduction:

Question

1. The extension does not respond when calling the host?

Solution

1. If there are multiple parts, you can call several extensions to test. If none of the extensions can connect, the code is incorrect. Check the ID on the back of the host and modify the main code channel; 2. If only one extension cannot connect or does not have the floor number information, you need to re-code; 3. If the coding is correct but still cannot communicate normally, you need to swap the good extension on-site for testing; 4. If it works after replacing the extension, it is an extension issue that needs to be sent back for repair; 5. If it still cannot connect, check the power supply and antenna for replacement testing; 6. If the main code is correct and re-coding still does not connect, then it is a host issue that needs to be sent back for repair.

Question

2. The extension connects to the host, but the call drops or the communication is unclear with noise and static?

Solution

1. Check the antenna connection when the line drops to see if it is properly connected and straighten it out; 2. Check the UPS power supply of the host and extension to see if it is 12-14V. If it is a multi-unit project, you can replace it for testing; 3. If there is noise and static, check if there are many obstacles in the communication or if the antenna is placed in an open area.

Question

3. The extension connects to the host, the host can hear the car speaking, but the car cannot hear the host speaking?

Solution

1. Check if the microphone jack is securely plugged in; you can test with the room’s handle.

Question

4. The extension connects to the host, the host cannot hear the car speaking, but the car can hear the host speaking?

Solution

1. When answering, do not pick up the handle, listen for any external sounds. If there is sound, it is a handle issue; if there is no sound, you can swap for a good extension for testing; 2. If multiple extensions still have this issue, then it is a host problem that needs to be returned to the factory.

Question

5. The extension cannot call the host?

Solution

1. Check if the signal line is connected incorrectly. Our company’s car intercom and bread machine have a red indicator light. If the connection is correct, the light will be on; otherwise, the light will not be on.

Question

6. The extension connects to the host, and there is howling sound during communication?

Solution

1. Check if the car intercom and panel are tightly attached, leaving no gaps; 2. If the intercom is not fixed to the car panel and there is still howling, then the intercom needs to be replaced for testing; 3. If a three-party intercom is installed, check if the intercoms at the elevator pit and the top of the car have been removed.

Question

7. The extension connects to the host, but the sound from the car is very low and unclear?

Solution

1. Check if the two signal lines in the car area pass through the elevator main board. If they pass through the main board, you need to change the external wiring; 2. If the sound is still low, you need to replace the intercom for testing; 3. Check if the car microphone hole is aligned with the operation box panel’s hole.

Question

8. The extension automatically calls the host?

Solution

1. Check if the accompanying cable is short-circuited or live; 2. If replacing it with a normal extension solves the problem, then it is an extension fault that needs to be returned to the factory.

Information source: Network

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Elevator Five-Party Communication Wiring Diagram and Common Issues Fujian Elevator Industry Association