Fire telephone 20 doors, 99 doors, telephone mainframe, panel mounted fire telephone mainframe

Description :

　　1、 Overview

　　1. Application scope: In case of emergency, communication between the control room and the site, as well as firefighting command and evacuation rescue

　　Waiting for special occasions.

　　2. This device adopts the pioneering technology of Kaituo CompanyTwo busTechnology has achieved compatibility between power supply and communication on two wires, with no polarity difference during wiring, making it convenient for construction and debugging.

　　3. This device has comprehensive detection measures, which can detect and sound for short circuits and open circuits on the bus and each path

　　Light alarm. After troubleshooting, it can be automatically restored.

　　4. This device adopts full digital control, and each functional unit is controlled by MCU, combined with software and hardware anti-interference technology,

　　So it can adapt to various complex environmental applications. Using silicone keys for control, it feels good to the touch.

　　5. The host and extension can call each other and have full duplex communication. The host can communicate with two machines simultaneously.

　　6. It has the function of recording and displaying call and response time; And it can forward query and display 100 records of host and extension call and response times.

　　7. Adopting advanced digital recording technology, reliable, long-lasting, and automatic recording of calls.

　　8. It has a self checking function and can detect display and sound emitting devices.

　　According to the number of extensions received, the DH9261/B fire telephone host has two specifications: 20 and 99.

　　10. Implementation standard: "Fire linkage control system GB 16806-2006", has passed the CCCF certification of the Fire Product Qualification Assessment Center.

　　2、 Main technical indicators

　　1. Power supply: DC24V ± 10%

　　2. Voice response: 300-3400Hz (± 3dB)

　　3. Transmission attenuation: ≤ 5dB

　　4. Line conditions: Extension loop resistance (excluding telephone resistance) ≤ 300 Ω

　　Wire: Shielded wire or twisted pair should be used, with a wire diameter of at least 1 square millimeter. If the wiring length exceeds 1 kilometer, the wire diameter should be appropriately thickened; If shielded wire is used, one end of the shielding layer should be grounded.

　　Inter line insulation resistance ≥ 20k Ω

　　Inter line capacitance ≤ 0.7 μ F

　　5. Bus length: ≤ 1000 meters

　　6. Recording time: greater than 20 minutes

　　7. Current: ≤ 1A

　　8. Clock error:<10s/day

　　9. Working environment: Temperature range of 0-40 ℃, relative humidity less than 95%.

AfterSalesService :

• fire telephone