Description
MOLAND M140-00
Technical Specifications Multi-channel signal input for fire/gas detectors; RS485 fieldbus communication; Supply voltage DC24V; Relay alarm output; DIN rail mounting; Protection class IP20.
Functional Features Signal acquisition and filtering from field safety sensors; Short-circuit and open-circuit fault diagnosis for each detector channel; Real-time upload of detector reading and fault status to central controller; Configurable alarm threshold; Relay contact output for local alarm activation; Built-in module hardware self-test on startup.
Application Scenarios Offshore platform fire and gas monitoring; Refinery safety detection system; Chemical plant hazardous area gas detection; Petrochemical storage tank farm fire alarm system.
Performance Parameters Operating ambient temperature -20℃ to +60℃; Storage temperature -40℃ to +85℃; Relative humidity 5% to 95%, no condensation; EMC meets petrochemical industrial safety standard.
Material Composition Flame-retardant plastic DIN rail housing; Multi-layer signal processing PCB; Surge suppression circuit components; Optocoupler isolation chips; Brass nickel-plated screw terminals; LED channel status indicators.
Structural Characteristics Narrow rectangular DIN rail form factor; Front panel LED indicators for power, communication and alarm status; Upper and lower terminal blocks for detector wiring, power supply and relay output; Internal isolation between field sensor circuit and bus communication circuit.
Working Principle Field fire and gas detector signals enter the module through terminal block. Signal conditioning and fault diagnosis circuit verify wiring integrity. Microcontroller converts raw sensor signals into digital data and transmits data to central safety controller via RS485 bus. When measurement exceeds preset alarm threshold, relay activates alarm output.
Installation Requirements Install module inside safe area control cabinet on standard DIN rail. Use shielded twisted pair cable for detector wiring and separate from high voltage power cable. Complete cabinet protective earthing. Configure module bus address and channel parameters after power-on, test each detector channel.
Usage Notes Cut off power before modifying field wiring. Perform periodic loop test for detector channels. Do not replace internal circuit components arbitrarily. Check terminal tightness regularly in vibration environment.
