The GD 4020 available from Gas Detection Australia is a 2-channel user-configurable control unit used with the 2500 series 4-20mA gas sensors.
Provided with a mains-powered 110-220v AC PSU, the 2-channel control unit for gas sensors derives all the power requirements for sensor and alarm circuitry in gas detection applications.
Easy to install, the slimline 2-channel gas sensor control unit incorporates a 20-character 4-line LCD display that shows the concentration and units for each channel.
Housed in a slimline ABS plastic box with IP55 rating, the gas sensor controller can be upgraded to IP65 if required.
An internal sounder that can be muted from the front panel is also incorporated.
The control unit features three volt-free SPCO relays per channel for three alarm levels.
A reset button allows the alarm relays to be reset when the alarm condition no longer exists.
Other features of the GD 4020 controller include a common fault relay, volt-free contacts and zero servicing requirements.
The 4-20mA O/PS can be scaled between two set points of the average of both inputs or the maximum of either O/P.
- Universal 110-220V I/P power supply
- 3 volt-free O/P relays per channel (6 x SPCO)
- 20-character 4-line LCD display
- Local buzzer
- Can be factory set up or field set up
- 5-year warranty
- 3 x 4-20 mA O/PS or 0-20mA or 0-10V
- RS485 MODBUS O/P
- Options: MIMIC panel (M2001)