Multi-gas leak unit for toxic and
combustible gases, refrigerants and oxygen.
Internal function monitoring with
integrated hardware watchdog
Hardware and software according to SIL2
compliant development process
change or comfortable on-site calibration
Modular technology (plug-in and
Reverse polarity protected, overload and
3 analog inputs (4-20 mA), 3 relays with
Potential-free max. 250 Vac, 5A
Two transistor outputs, 24 Vdc; 0,1A
Serial RS 485 interface with protocol for CGD
Modbus protocol as an option
Display depending on type and multicolor
(Power LED with 3 colors, buzzer)
Gas Leak Unit up to 3 detectors
board housing IP 65
Power supply 90 – 230 V, 24/12V Picture shows 230V
Relays 230V/5A (max 3Stk.)
Interface service tool / display
Analog input 4-20 mA (max. 3 pcs.)Digital output 2x DC for horn/flashlight
Warning module (power LED, buzzer)
Features and Benefits
Direct connection to GLT via Modbus
Direct connection of 3 sensors and 2
Setting of thresholds (variable) via
Customer protection by PIN / digital
Tool ParkGard control center
Measuring, warning and controlling device for
toxic, combustible and refrigerant gases and vapours.
The gas leak unit series CGA can monitor
and manage up to 12 analog gas sensors (4 to 20 mA).
Five free adjustable alarm thresholds
are provided per sensor.
For the alarm messages the controller offers up to 15 alarm relays
with potential-free change-over contact and up to 6 analog outputs with 4 to 20 mA signal.
Gas Leak Unit up to 12 detectors
The freely adjustable parameters and set
points enable a very flexible use in the gas measuring technique. Simple and comfortable
commissioning, however, is granted by the configuration with default parameters.
Configuration, parameterization and operation
are easy to do directly at the controller without special programming knowledge due to the
logical, simple menu structure.
The CGA series is equipped with a self
-monitoring system, with power failure message as well as with a functional control of the
registered analog sensors according to the requirements of the gas measuring technique.
Different interface und protocol options are
available for the connection to a superior BMS.
eatures and benefits:
For up to 12 analog gas sensors (4 to 20mA)
Logical system menu
Five freely adjustable alarm thresholds
Six menu languages, selectable
Several alarm relays configurable per
Alarm release by falling or increasing
gas concentrations selectable
Max. 15 alarm relays with change-over
contact, potential-free, max. 250V
ac, 5 A
Fault relay with change-over contact,
potential-free, max. 250V
ac, 5 A
Maximum 6 analog outputs, 4 to 20mA
Integrated warning buzzer
In specifying gas monotoring plants
the following planning options are recommended:
2-10Vdc/4-20mA detectors or AP:s bus
if power supply and signal reception for these can be arranged, or
systems with detectors for central instruments, or completely
independent detectors without instruments that provide a relay
signal in cases of alarm.
Each detector is supplied with data to
interpret the analog output signal it produces.
All types of analog sensors and AP:s bus
detectors and 96 bus detectors not only for gas
can be used on central instruments.
Each detector generates two alarm levels
in the central instrument, one for control purposes (flashlight), the
other for emergency purposes (gas alarm sign).
Each detector is reported separately on the
Each detector's alarm levels, give control
options which to a large extent can be customized.
Normally each sensor provides its own
relay signal at level 1 (flashlight) and level 2 (gas alarm
Level 2 can also often be designed with a
condition so that a minimum number of detectors´ Level 2 alarms, is
required before the relay is activated.
The relays also have a built-in time delay.
Time delay can also be customized.
Each Gas Controller has at least one measured
data per gas type so that before entering the monitored space, the
staff can see the detector readings.
The Gas Controllers are equipped with
self-diagnostics that can alert errors in the plant:
Time for exchange of sensor elements
Alerts are given even for inadequate AC power
or battery back-ups.
The Gas Controlles have the following system functions
Easy operation with six menu buttons
Password protected in two levels
User Level 1
Service technicians level2
Individual identification of each zone /
Reads both current and average values (10
values measured during the time span) in the display.
Can supervise 2-64 zones
Service Function 60 minutes
External alarm blocked
Display information that service of the
the system is necessary
The display shows phone number to the
service technician when service date is exceeded
Choice of different types of gas
The last 15 error alarms marked with date
Log of recent arms
Current alarm displayed in text
5 alarm levels per detector
Output alarm relay can be set with time
Alarm memory showing the last 5 alarms
Manual control of output relay functions
Programming for the flash function for
gas alarm sign
External relay control
Operation Mode = Evaluation of alarms
from current are average values
Time delay at start
Check and configuration lists
Gas Leak Unit for 4 measuring points
Recessed Gas Leak Unit for 4 measuring
points and 96 analog bus detectors
Gas Leak Unit CGD for measuring points
and 96 analog bus detectors
Gas Leak Unit for 96 measuring points,
bus and 30 analog detectors