INFORMATION SHEET
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The GDA 4020 control unit has 2 x 4-20 mA i/p with 3 associated programmable relay alarm levels per sensor. There is an independent fault relay. There are 3 x analog o/p’s which can be configured for either channel as 4-20 mA, 0-20 mA, 0-5 V or 0-10 V. The controller has an isolated RS485 o/p which can be configured to drive modbus or an interface to the M2001 mimic panel. All configurations are carried out via the front panel push buttons. The unit requires 24 VDC.

Designed, manufactured and supported locally in Australia.

  • Low profile mounting (Optional flush mounted)
  • Easy to install
  • No servicing requirements
  • 3 x Alarm relays per sensor (SPCO)
  • Faults relay (SPCO)
  • Isolated Modbus output RTU
  • 3 x Programmable 0-20 mA or 4-20 mA o/ps (Optionaly 0-5 V or 0-10 V o/ps)
  • Real time display of gas levels, alarms and location
  • Internal buzzer
  • All parameters user programmable

Made in Australia and Supported in Australia


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Meets the requirements of AS5034-2005

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Hazardous Areas are areas in which an explosive gas atmosphere is or may be expected to be present, in quantities such as to require special precautions for the construction installation and use of equipment construction, installation and use of equipment. Hazardous areas are classified into 3 zones based upon the frequency of the occurrence and duration of an explosive gas atmosphere, as follows:

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Specification NameSpecification Value
Detectable Gas Ranges1 or 2 sensors (ranges user programmable to suit each sensor)
Power Requirements+24 VDC
Output Types3 X SPCO alarm relays per sensor + 3 x Analog o/ps congigurable as 4-20 mA, 0-5 V, 0-10 V
Output Specificationsrelays: 2A non inductive 220 VAC , Modbus RTU; 3 x 4-20 mA max loop R = 800 Ω
Power Consumption~5 W (Excluding sensors and external 24 VDC loads)
ConnectionPlug in sockets
Operating Temperature-10 - 40°C
Operating Humidity5% to 95% RH peak non condensing
TechnologySMT with LCD display
Dimensions240 x 176 x 75 mm (W x H x D)
Enclosure MaterialABS Plastic
Enclosure RatingIP40
Warranty24 months from date of dispatch
Product Description
4020-001 2 channel control unit 24 VDC

 

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M2001 : Flush Mount Mimic Panel

The M2001 is a low profile flush wall mounted mimic panel. These units are used on multi entry rooms so that users may view the gas levels and alarm status of each entry point for entering the room, used in conjunction with the GDA 4020GDA 2400 or GDA 4500 control unit.

Designed, manufactured and supported locally in Australia.


REP 2016 : Repeater Panel

The GDA Dual Channel Repeater Panel allows for simple replication of the alarm and system status of all GDA gas detection controllers by visual and auditory indicators.

Designed, manufactured and supported locally in Australia.


MS001 : Flush Mount Mute Switch

The MS001 uses one of the alarm relays from a GDA gas detection controller to drive the AVR-20R/YM sounder & flasher. The sounder- flasher can be muted by incorporating the MS001 into the output switched 24 VDC from the control panel.

Designed, manufactured and supported locally in Australia.


GDA 620 : Galvanic Isolator 1kV for 4-20 mA lines

This small potted Isolator is used for the protection of 4-20 mA signal lines against high voltage breakthrough and ground loops that give rise to noise problems. It is designed to be mounted inside or adjacent to control equipment. Cable Interface is via plug and socket.

Designed, manufactured and supported locally in Australia.


AVR 20 : Alarm Flasher and Sounder

This sounder/flashers operates at 24VDC. The sounder can be permanently disabled so that unit acts as a flasher only. These units are designed for internal use. These are available in Red or Amber.