Hainan Shidian IoT Fire Door Monitoring System Solution

I. Introduction to Fire Door Monitors

✰ Fire Door Monitor

A Fire Door Monitor is a control device that displays and controls the open/close status of fire doors. It also serves as the bridge and link between the central control room or the Fire Automation Alarm System (FAS) and front-end devices such as electric door closers, electromagnetic door holders, electromagnetic releases, and escape door locks.

II. Technical Principle of Fire Doors

Fire doors are commonly used openable/closable fire compartment components in various buildings. Some fire door products installed in buildings pose significant safety hazards due to poor usage management. If the working status of fire doors cannot be effectively monitored from the fire control room, their function of preventing fire spread, smoke diffusion, and aiding personnel evacuation during a fire cannot be guaranteed.
The Fire Door Controller can monitor the open/close status of fire doors, provide alarm prompts for doors in abnormal states, restore them to normal working condition, and ensure their functional integrity.

III. Fire Door Monitor Implementation Standards

National Standard GB50016-2014 "Code for Fire Protection Design of Buildings", enacted on May 1, 2015, Clause 6.5.1 stipulates:

Normally open fire doors shall be capable of self-closing in the event of a fire and shall have a signal feedback function. To ensure the smoke-blocking function of fire doors, GB50016-2014 "Code for Fire Protection Design of Buildings" Clause 6.5.1 stipulates:
Fire doors shall possess smoke resistance after closing.

Thus, fire doors installed in buildings must not only self-close during a fire but also ensure complete closure. However, current engineering applications reveal that the condition of fire doors in use is concerning. Widespread issues exist where damaged components like door closers and sequencers prevent doors from closing or sealing properly. To effectively control the closing of normally open fire doors and monitor the working status of all fire doors (including normally closed ones), corresponding monitoring and control systems must be established for unified management.

IV. Overview of Our Company's Fire Bus

Our company's fire bus is a long-distance, multi-host communication fieldbus. Unlike RS485 and CAN bus, it employs an unbalanced transmission method, transmitting data while simultaneously powering nodes. That is, using just two wires, it can both transmit data and supply power to nodes on the bus. This is similar to M-BUS, but unlike M-BUS, it can provide nodes with currents exceeding 2A. Due to the unbalanced data transmission, the bus is designed to be non-polarized. Each host on the bus adapts to the bus baud rate automatically and synchronizes.
The bus power supply range is 12V~32V. It features strong load capacity, long transmission distance, and far superior anti-interference capability compared to buses like RS485.

❥ Main Functions

Input/output features short-circuit, open-circuit protection, and detection functions

• Remote online monitoring via network
• Fire door monitor has multiple status indicators
• Fire door monitor has self-test function
• Fire door monitor controls fire door closure upon receiving fire control signals
• Fire door monitor can quickly diagnose and indicate fault status via buzzer and indicator lights

❥ Main Features

• Two-wire, non-polarized design prevents losses due to wiring errors
• Signal + power transmission method reduces cable and labor costs
• Arbitrary topology wiring minimizes line redundancy
• Integrated design with built-in terminals, no need for junction boxes
• Active status reporting, no passive polling required, enabling fast response
• Active address reporting eliminates complex settings

❥ Solution Comparison

☒ Traditional RS485 Solution

☑ Our Solution

❥ Convenient On-site Installation

The bus uses an unbalanced transmission method, allowing flexible cable selection. Differential cables are not required; standard RVV cables suffice. The bus topology can be arbitrarily connected, significantly reducing on-site wiring complexity—wire as needed to save cable. The bus is designed to be non-polarized. In bus-powered system applications, technicians do not need to remember polarity or install matching resistors required for RS485 and CAN buses, greatly lowering the technical requirements for construction personnel.

V. Application Areas

VI. Hainan West-HN

Hainan West-HN Technology Co., Ltd., with the vision of "Making Standardization of Industrial IoT Simpler," focuses on the IoT industry chain. We continuously conduct R&D in indoor positioning, sensing control, and data transmission products, adopting a "Lego-like" production approach to precisely meet the small-batch, high-variety demand characteristics of industrial IoT products. We provide solutions for complex environments and personalized needs, truly achieving a new supply-demand relationship with low inventory and high satisfaction.

The company has R&D centers in Shanghai, Suzhou, Chengdu, and Taipei. Upholding the group's nearly 40 years of strong commercial resources and reputation, we firmly believe in the business philosophy of "Being Experts in the Industry." We excel in channels, are sensitive to the market, focus on products, ensure reliability in R&D, stability in production, and quality in sales, always dedicated to the ultimate satisfaction of personalized scenario needs for industrial IoT customers.

Regarding products, we have Zigbee positioning products developed by our in-house team over a decade, as well as UWB positioning products developed by teams in Shanghai and Taipei, meeting different customer requirements for positioning accuracy. Simultaneously, the company introduces Bluetooth positioning products to complement our self-developed solutions, comprehensively fulfilling the needs of various customers.

In software support, we integrate overall solutions across industries, actively open interfaces and source code for system integrators, and facilitate case demonstrations for related software companies based on our products, broadening the application of IoT indoor positioning.