Overview

The Fixed Gas Detection System (FGSS - GDS-200) is designed to monitor gas concentration levels in enclosed spaces such as cargo holds and machinery rooms. It provides real-time gas detection, alarm notifications, and system diagnostics to enhance onboard safety.

1. Safety Information (p.6-8)

• Electrical Hazard: Ensure power is disconnected before maintenance.
• Anti-Static Precautions: Handle PCBs with proper grounding.
• Storage Conditions: Keep in dry, protected environments before installation.

2. System Components (p.11-18)

2.1 Gas Detection System

• Up to 100 analog input channels for continuous detection.
• Alarm output: Up to 40 contact outputs with pre-alarm and main alarm settings.
• Power Supply: 24VDC.
• Communication Interfaces: RS-485, CAN, Modbus.

2.2 CPU Module

• Acts as the central processing unit, managing communication with sensors and alarm modules.
• Supports CAN communication for I/O modules.

2.3 Analog Input Module (AI4CH)

• Processes gas concentration data from detectors.
• 4-20mA signal processing for precise gas level measurement.

2.4 Digital Output Module (DO4CH)

• Provides contact signals for alarms and actuator control.
• 4-channel dry contact output.

2.5 Digital Input Module (DI8CH)

• Receives dry contact signals from gas detectors.
• Supports up to 8 channels.

2.6 Display Unit (HMI - HGS-200CD)

• 12.1-inch touchscreen LCD for real-time monitoring.
• Displays gas concentration, alarm status, and system faults.

2.7 Gas Detectors

• CH4, O2, CO2, H2S, and other toxic gas sensors.
• Response Time: <30 seconds.
• Power Supply: 24VDC.

3. System Operation (p.19-24)

3.1 Normal Operation Mode

• The system boots automatically when power is turned on.
• Gas concentration readings are displayed in real-time.
• Alarms activate when gas levels exceed pre-set limits.

3.2 Alarm & Fault Indications

4. Configuration & Calibration (p.28-36)

4.1 I/O Settings

• Configure sensor channels, alarm thresholds, and unit settings.
• Modify alarm range settings for each sensor type.

4.2 Calibration

• Zero Range Calibration: Adjusts baseline at 4mA signal.
• Full Range Calibration: Sets 100% scale at 20mA.
• Detector Initialization: Resets calibration to factory settings.

4.3 Alarm & Log Settings

• Logs alarm history, sensor data, and system events.
• Data is stored for analysis and troubleshooting.

5. Troubleshooting & Maintenance (p.37-42)

6. Storage & Handling (p.8)

• Protect components from moisture and static discharge.
• Store gas detectors in dry, dust-free environments.
• Ensure all sensors are properly sealed before installation.

7. Related Documents (p.42)

• Sensepoint XCD Gas Detector Manual
• Searchpoint Optima Plus Gas Detector Manual
• GDS-200 I/O Module Technical Guide