Crowcon Gasflag Petunjuk Pemasangan, Pengoperasian, dan Pemeliharaan untuk Pemasang dan Pengguna - Halaman 6
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Figure 3.1 Electrical connections for powering an external alarm device
3.4 Setting earthing requirements
The Gasflag control panel provides flexible earthing arrangements. The
LINKS 1 and 2 on the RELAY PCB allows earthing configuration for 0 V
and SCREEN. The links are summarised in the table below.
Table 3.1: Gasflag earthing configurations
LINK
LK1
Isolate 0 V from earth
LK2
Link SCREEN to 0 V
When configuring these settings please ensure that local
regulations and site procedures are followed.
4 OPERATION
Table 4.1 summarises the action of pressing the ACCEPT/RESET button
on the ALARM and FAULT RELAYS, the LED indication and the BUZZER
in the event of gas levels increasing and returning to normal.
The left column in the lower portion of the table for 'Reducing gas levels'
are marked to indicate LATCHING and NON-LATCHING system
configuration.
A
Link 0 V to earth
Link SCREEN to earth
5
B