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Operation principle
The detectors performs cyclical measurements of gas concentration in the air and then the indicator lamps
(LEDs) of the detector are used to provide information whether the concentration is safe or any threshold
limit is exceeded. At the same time a signal is sent to the control unit to trigger appropriate actions, i.e. to
actuate a valve, display a warning message on a board or activate the ventilation system.
2
Safety
All activities related to connecting detectors, signallers or other elements must be carried
out while control unit's power supply is off.
Despite the power supply voltage for the Gas Safety System is off, dangerous voltage may
persist across terminals of the control unit. Such a voltage may come from another system
controlled by the same unit, for instance ventilation, that use one output pin of the control
unit.
The devices of gas detection system must be reliably secured during any repair, installation
or maintenance works.
3
Input-output interfaces
The Gas Detection & Safety System serve as a source information for both the system operator and for
other automation systems deployed within the building.
Gas Detection&Safety
System
Fire protection
system
Ventilation system
Other systems
User
Control unit module
Yes
Yes
Yes
Yes
Control V Valve Controller
No
No
No
Yes
Detectors
No
No
No
Yes
Gas Warning LED Display
No
No
No
Yes
Signalling devices
No
No
No
Yes
Table 2: Gas Detection & Safety System output interface
Information about current status of detectors deployed on the facility area is disseminated by means of the
following methods:
detectors and the control unit module – by means of indicator lamps (LEDs) provided on the
device enclosure (see details in appropriate User Manual for a specific device),
warning LED displays – a relevant message is displayed,
signalling devices – optical and acoustic.
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User Manual: POD-047-ENG R03
Summary of Contents for Teta Gas
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