MINIMAX WMX1000F90

Core Technical Specifications

• Input Power Supply: AC 110/230V dual-range switching power supply, backup 24VDC built-in lithium battery (72h standby)
• Signal Input Channels: 16 analog fire detector input channels (4–20mA smoke/temperature sensor)
• Output Control Channels: 8 relay output channels for extinguishing solenoid valve, alarm horn, fire damper interlock
• Explosion Protection Standard: Ex d IIC T6 Gb, IP66 full enclosure waterproof dustproof grade
• Communication Interface: RS485 Modbus RTU, fire system dedicated bus for upper fire host connection
• Operating Temperature: -40°C ~ +70°C
• Relative Humidity: 5%–95% non-condensing
• Certifications: ATEX, IECEx, UL fire safety, SIL2 functional safety certification
• Cabinet Dimensions: 420mm × 310mm × 165mm, total weight 6.8kg
• Extinguishing Delay Adjustable Range: 0–300 seconds programmable

Functional Features

1. Full explosion-proof cast aluminum enclosure design, safe deployment in Zone 1, Zone 2 explosive gas hazardous areas
2. Independent channel fire signal threshold configuration, separate smoke and temperature dual-judgment fire logic to avoid false alarm
3. Complete circuit fault diagnosis: detector open circuit, short circuit, power loss, solenoid valve wiring break real-time monitoring
4. Programmable multi-stage interlock logic: fire detection → audible/visual alarm → adjustable delay → automatic extinguishing agent release
5. Built-in historical event storage, record fire alarm, fault, extinguishing action logs for 5 years retrievable
6. Remote monitoring via Modbus communication, real-time upload fire status to central fire control room
7. Manual emergency release button interface for on-site manual trigger fire suppression under emergency situation
8. Anti-interference EMC circuit design, stable operation under strong electromagnetic interference of chemical plant frequency conversion equipment

Working Principle

1. Smoke and temperature fire detectors transmit 4–20mA analog fire intensity signal to each input channel of WMX1000F90 control panel.
2. Main control chip compares real-time detector signal with preset alarm threshold; when single/double channel signal exceeds threshold, enter pre-alarm state and activate local audible-visual alarm output.
3. If fire signal persists beyond confirmation delay time, control panel triggers extinguishing output relay to open fire suppression agent storage tank solenoid valve, release foam/gas fire extinguishing medium.
4. Diagnosis circuit scans all input/output wiring every 100ms; abnormal circuit state stored as fault code and uploaded to upper monitoring system via RS485 bus.
5. Built-in backup lithium battery automatically switches power supply once AC mains power fails, maintain full system monitoring function for 72 hours continuously.

Structure & Material Composition

• Explosion-Proof Main Cabinet: High-pressure die-cast aluminum alloy thick wall shell, internal flame-proof separation cavity structure
• Cabinet Seal: EPDM rubber fully surrounding waterproof sealing gasket, anti-aging oil resistant
• Internal Circuit Board: FR4 fire-retardant PCB, all electronic components explosion intrinsically safe certified
• Terminal Chamber: Independent separated wiring explosion-proof cavity, external cable compression gland with IP66 waterproof
• Operation Interface: Explosion-proof transparent tempered glass observation window, internal LED status indicator, sealed non-spark operation buttons

Installation Requirements

1. Mount on vertical wall of hazardous explosion zone, minimum 1.5m height from ground, avoid direct flushing of production process water
2. All external signal and power cables must use explosion-proof metal armored cable, matched certified cable compression glands only
3. Separate wiring for fire detector signal cable and high-power equipment power cable, routing distance ≥ 30cm to eliminate signal interference
4. Cabinet grounding terminal connected to factory hazardous area dedicated safety ground network, ground resistance ≤ 0.5Ω
5. Reserve 20cm maintenance space on all four sides of explosion-proof cabinet, do not block heat dissipation and wiring cavity
6. Explosion-proof cabinet cover bolt tightening torque strictly follow factory standard 4.0 N·m evenly diagonal locking

Application Scenarios

Operation & Maintenance Precautions

1. Only factory-certified explosion-proof maintenance personnel allowed to open cabinet cover; power must be fully cut off before opening explosion-proof cavity
2. Do not replace internal circuit components with non-SIL2 certified parts, will lose explosion-proof and fire safety certification validity
3. Inspect cabinet EPDM sealing gasket every 6 months; replace gasket once aging cracking or deformation found
4. Regular test backup lithium battery capacity annually; replace battery if standby time shorter than 48 hours
5. Do not install this unit in environment with corrosive acid/alkaline gas; corrosive gas will damage aluminum explosion-proof shell
6. Clean cabinet surface only with neutral water-based cleaning agent, prohibit organic solvent wiping transparent observation window