Functional Features：

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1. Small in size and easy to install;
2. Color LCD screen, silicone buttons, easy to operate;
3. Non polarized two bus wiring method, with a maximum of 127 address codes;
4. Suitable for twisted pair, parallel wire, and shielded wire wiring. Using twisted pair cables, the communication distance can reach 6000 meters; 5. It can be connected to the manual telephone jack through the external terminal of the bus telephone jack, with a total of up to 1000~5000 points; 6. Unique voice enhancement technology significantly improves signal-to-noise ratio and ensures clear communication;
7. Can simultaneously make full duplex calls with up to five telephone extensions
8. It has the functions of telephone extension and socket fault inspection, and bus short circuit protection:
9. Equipped with a DC-DC power supply, the bus is isolated from the 24V input power supply
10. It can manually block the fault alarm of the extension or socket for easy engineering debugging
11. Automatic import of address book function.

Technical Parameter：

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Working voltage: rated voltage DC24V, expandable to AC170-265V input
Working current: Static current<150mA, maximum current<1A
Bus voltage: 30V (normal mode), 36V (long line mode)
Bus drive current: Max: 500mA
LCD screen specification: 160x128 color graphic dot matrix
Number of encoding extension points: Max: 127 points
Voice frequency range: 300Hz~3400Hz
Voice transmission loss:<5dB
Maximum Line Resistance: 800 Ω (200mA), 1600 Ω (100mA), 320 Ω (50mA)
Call distance: 6000 meters (bus terminal voltage not less than 16V)
Dimensions: 318mm x 129.5mm x 245mm
Usage environment: Temperature: -10 ° C~+55 ° C; Relative humidity<95%, no condensation
Execution standard: GB 16806-2006 "Fire linkage control system"