GDS 100 Single-Point Gas Alarm Control Unit GD-100-PEL-230

The GDS 100 GD-100-PEL-230 is a fixed single-point gas alarm control unit for monitoring combustible, oxygen, and toxic gas hazards in commercial, industrial, and process environments. It supports internal or remote sensors and can be wall- or panel-mounted.

Typical applications include boiler plant rooms, public buildings, swimming pools, water treatment facilities, HVAC control systems, manufacturing plants, and process facilities.

Key Features

• Monitoring for flammable gas, oxygen, toxic gas, or compatible 4–20 mA input signals
• Wall- or panel-mount configuration
• Two alarm stages with relay outputs
• Internal or remote sensor connection
• 4–20 mA analogue output
• Compact enclosure with low power consumption
• IP65 protection
• Extensive fault-detection circuitry
• Selectable alarm delays
• Digital 3½-digit display
• Green power LED, red low/high alarm LEDs, and amber fault LED
• Audible low, high, and fault alarms rated at 68 dB at 1 m
• System test switch and sounder inhibit function
• Alarm relay inhibition during calibration

Technical Specifications

• Measurement ranges:
• Combustible gas: LEL, % volume, or ppm
• Toxic gas: ppm or % volume
• Oxygen: % volume for depletion or enrichment
• Compatible 4–20 mA input signals
• Power consumption: 4 W at full alarm
• Alarm relays:
• Low, high, and fault alarm relays
• SPCO contacts, normally de-energised; energised option available
• Low gas relay available as normally energised or de-energised
• Latched or unlatched operation
• Contacts rated at 5 A, 230 V AC
• Analogue outputs: 4–20 mA and 1–5 V
• Auxiliary output: 24 V DC at 100 mA maximum for non-inductive equipment
• Alarm settings: Fully adjustable from zero to full scale
• Alarm delay options: 10 seconds, 30 seconds, or 10 minutes
• Sensor inputs:
• Three-wire bridge-type detector, MV catalytic
• 4–20 mA electrochemical or infrared sensor
• Sensor cable: Three-core, 1.5 mm² screened cable up to 1.5 km
• Operating temperature: −10 to +50 °C
• Storage temperature: −10 to +65 °C
• Protection rating: IP65
• Field terminals: 2.5 mm screw terminals
• Cable entry: Top, bottom, sides, and rear
• Dimensions: 200 mm L × 120 mm H × 58 mm D
• Weight: 0.8 kg

The GDS 100 is suitable for fixed gas detection systems used in industrial safety, environmental monitoring, water treatment, and building services applications. Items delivered include the GDS 100 single-point gas alarm and a certificate of conformity.