The GMSC converter series is a control solution designed to manage the Nissha FIS5000 modules. By interpreting PWM signals, the device determines the sensor’s operational status and manages two alarms in case of gas leakage or malfunction (either sensor or controller), activating a relay. The system features clear visual diagnostics through LEDs and remote diagnostics via Modbus.

Its advanced firmware implements intelligent logic to monitor both the alarm status and the “life” of the sensor, making the product highly reliable for industrial and civil applications.
Key settings are stored in EEPROM to ensure configuration is retained even after power-off.

Main Features

• Smart Diagnostics: The firmware decodes the PWM duty cycle to determine sensor status.
• Operational Reliability: Initial relay test, watchdog, and monitoring/self-check loops ensure safe operation.
• Simplified Integration: Modbus RTU communication allows seamless integration with HMI, PLC systems.
• Instant Feedback: Dynamic LEDs provide intuitive visual diagnostics, including a “breathing” effect that indicates sensor life status.
• Fail-Safe Operation: The relay activates automatically in case of gas alarm, sensor malfunction, end-of-life status, or persistent PWM signal error.
• Low Maintenance: The board requires no routine maintenance.