Beijing Leader Huaxin JB-QB-LD128EN(M) Fire Alarm Controller

Beijing Leader Huaxin JB-QB-LD128EN(M) Intelligent Linkage Type Fire Alarm Controller

Beijing Leader Huaxin JB-QB-LD128EN(M) is an industrial grade, high integrated two-wire (bi-bus) intelligent linkage type fire alarm control panel. This master control unit is designed for mission-critical commercial, industrial and marine operating situations integrating automated hazard detection with direct matrix-driven linkage output controls.

The panel is based on a heavy duty multi-processor architecture with active short circuit protection on the signal loops and integrated power distribution rails. The black-box memory logs were thorough in their depth and were used to log system states to secure tracking data on naval switchboards or localized control zones. It is bi-lingual (English/Chinese) and structurally resilient for localized fire monitoring and autonomous activation of suppression systems without the need for supplementary relay interfaces.

Model Details:

• Manufacturer: Beijing Leader Huaxin Electronic Technology Co., Ltd. (Beijing Lida)
• Model Number: JB-QB-LD128EN(M)
• Type Designation: Linkage Type / Intelligent Bi-Bus Fire Alarm Host
• Manufacturer Part Number (MPN): JB-QB-LD128EN(M)

Technical Specifications: JB-QB-LD128EN(M) 

Features

1. Dual-Loop 512 Addressable Point Capacity: Supports up to two independent intelligent detection loops with a maximum system configuration of 512 total addressable nodes (up to 256/258 addresses per individual loop architecture).
2. Integrated Multi-Line Manual Control Panel: 1 × integrated manual linkage matrix control panel with 8 x dedicated loop outputs and 1 x highly-specialised supervised output channel for sounder/strobe distribution arrays.
3. High-Fidelity Black-Box Memory Storage: Hardware-level data logging retains a minimum of 1,000 discrete fire alarm logs, 1,000 gas suppression sequence logs, and 1,000 generic system status activities for post-incident analysis.
4. Smart Short-Circuit Isolation and Self-Healing The bi-bus loop infrastructure provides constant electronic current monitoring that automatically isolates field faults at 400mA thresholds, hence ensuring complete operational integrity of unaffected loop sectors.
5. Two System Linkage Control Modes: Supports flexible command execution, where the linked peripheral systems can be actively triggered via the standard shared multiplex communication BUS or by the direct hardware multi-line panels.

Terminal Allocations & Wiring Ratings

• L / N / PE (Main Input Power): Dedicated terminal blocks for AC 220V power termination. Recommended cable: 3x 2.5mm² flame-retardant copper core, cross-sectional area with shielding.
• S+ / S- (Loop 1 Data Bus): Intelligent polar-modulated signal line for Addressable Loop 1. Supports multi-drop branch or closed-loop ring topologies.
• S2+ / S2- (Loop 2 Data Bus): Intelligent polar-modulated signal line for Addressable Loop 2. Max distance profile up to 1,500 meters using twisted-pair shielded cable (minimum 1.5mm² copper core).
• ALM1 / ALM2 (Common Fire Relay): Completely unpowered, passive dry contacts rated up to 1A @ 30V DC or 0.5A @ 125V AC. Closes instantly upon any valid addressable sensor latching into a fire state.

Compatible Equipment Models & System Architecture

The JB-QB-LD128EN(M) functions as a centralized command host within the wider Beijing Leader Huaxin ecosystem:

• Addressable Detectors: Direct bi-bus integration with LD1200 series addressable ionization/photoelectric smoke detectors, LD1300 series fixed-temperature/rate-of-rise thermal sensors, and dual-sensor multi-criteria modules.
• Manual Trigger Systems: Fully compatible with LD1800EN series manual call points (break-glass and push-button types) incorporating integrated addressable coding chips.
• Linkage Control Modules: Pairs seamlessly with LD6800 series output modules (single/dual channel) to orchestrate ventilation dampening, magnetic fire door release, and electrical trip sequences.
• Suppression Subsystems: Connects directly via manual control lines to the LD5502ENI gas-extinguishing panel series for fixed gas flooding control.

Part Number Cross-References

• Beijing Lida Equivalent: JB-QB-LD128EN
• Linkage Sub-Variant: JB-QB-LD128EN(M)-AI
• Sister Series System: JB-QB-LD988EM / JB-QG-LD5502E