Description
Det-Tronics EQ21OOCG
Technical Specifications:
- Power Supply: 24 VDC, 18–30 VDC wide input
- Max Power Consumption: Less than 25 W
- I/O Capacity: Expandable digital and analog I/O channels
- Communication: Modbus RTU, Ethernet, CANbus options
- Safety Certification: SIL 2, UL, CSA, CE certified
- Operating Temperature: -40 °C to +70 °C
- Storage Temperature: -40 °C to +85 °C
- Enclosure: Aluminum alloy metal housing
- Mounting: DIN rail or panel mount
Function Features:
- Process input signals from flame, gas and smoke detectors
- Configurable safety logic, voting logic and alarm interlock
- SIL rated relay outputs for safety shutdown and alarm
- Built-in continuous self-test of internal circuits and firmware
- Fault diagnosis for detector wiring break, short circuit and module failure
- Event log storage for alarm, fault and system diagnostic records
- Real-time communication with DCS and SCADA systems
- LED indicators for power, fault, alarm and safety trip status
Application Scenarios:
- Oil refinery fire and gas safety monitoring system
- Offshore oil and gas platform hazardous area protection
- Petrochemical plant process unit fire and gas interlock
- LNG storage and processing facility safety system
- Chemical plant fire and gas detection control cabinet
Material Composition:
- Housing: Corrosion resistant cast aluminum alloy
- Main PCB: Multilayer FR4 fiberglass circuit board with conformal coating
- Control Core: Safety certified industrial microprocessor
- Relays: SIL rated safety electromechanical relays
- Terminals: Screw type copper terminals for detector and power wiring
- Passive Components: Industrial grade surge suppression components
Structural Features:
- Compact metal enclosure, DIN rail mounting compatible
- Front panel with multi-color LED status indicators
- Internal separated safety circuit and communication circuit zones
- Metal housing provides electromagnetic shielding
- External terminal blocks for field detector wiring connection
- Sealed housing design for industrial environment
Working Principle: Flame and gas detectors send analog or digital signal to EQ21OOCG controller. The safety microprocessor continuously reads detector values and executes pre-programmed safety logic. When gas concentration exceeds threshold or flame is detected, controller activates alarm relay and safety shutdown relay according to configured logic. The controller runs automatic self-test cycle to check internal hardware integrity. All alarm and fault events are saved in non-volatile memory and uploaded to upper monitoring system.
Installation Requirements:
- Mount controller inside non-hazardous control cabinet outside classified zone
- Use shielded twisted pair cable for detector field wiring
- Separate detector signal cables from high voltage power cables
- Install reliable protective earth for metal housing
- Maintain cabinet temperature within rated operating range
- Follow SIL system installation and wiring specifications
Usage Notes:
- Complete safety logic configuration and loop testing before site commissioning
- Verify SIS safety function proof test periodically per site safety requirement
- Do not modify safety logic configuration without safety management approval
- Disconnect power supply before opening housing or changing wiring
- Check terminal tightness regularly
- Replace module immediately if continuous internal fault alarm appears
