www.atestgaz.pl
Figure 7: Connecting into two open bus systems servicing two zones
7
Configuration of gas detectors
7.1
Location of the detector operation
To enable reliable operation of gas detectors they have to be configured by appropriate setting of the
configuration switch provided inside the detector (see Figures 2 and 8).
Two positions of the switch are possible:
end-line detector – it is the setting for detectors arranged according to the star layout or for the
last detector installed at the far end of the bus line with an open communication loop,
line-up detectors – it is the setting for all detectors arranged according to the bus layout with an
closed communication loop and for nearly all detectors, except for the last one, deployed down an
open-loop communication line.
System layout
Detector location
Setting for the configuration switch
Bus layout with an open loop
Last (most distant)
location
Position 2 (OST)
Line-up detector
Position 1 (POS)
Bus layout with a closed loop
Any location
Position 1 (POS)
Star layout
Any location
Position 2 (OST)
Direct connection to Alpa EcoWent XT
Any location
Position 1 (POS) – see also Section 7.2
Table 4: Settings of the configuration switch
Incorrect setting of the configuration switch usually leads to misbehaviour of the gas
detection system (false information about system defects or failure of a line-up detector to
pass on signals from more distant detectors).
s. 13|25
User Manual: POD-043-ENG R03
Bus 2 – Alarm zone 2
Number of detectors: 3
Bus 1 – Alarm zone 1
Number of detectors:3
Summary of Contents for Alpa EcoDet XT
Page 1: ...POD 043 ENG R03 User Manual Gas Detector Alpa EcoDet XT Product code PW 098 LPG...
Page 45: ...www atestgaz pl Notes...
Page 46: ...www atestgaz pl Notes...
Page 47: ......
