Crowcon Gasflag Інструкції з монтажу, експлуатації та технічного обслуговування для установника та користувача - Сторінка 2
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1 INTRODUCTION
1.1 Description
The Gasflag is a single channel control panel designed to monitor remote
4-20 mA gas detectors. The Gasflag is an alarm only apparatus providing
two independent user configurable alarm relays, which can be used to
control external visual or audible alarms. The Gasflag is designed to work
in safe areas only but can be used to monitor gas levels in hazardous
areas using a suitable detector. The Gasflag does not require calibration
and has been designed for one man installation.
The Gasflag consists of a single shell with a front panel containing a
ACCEPT/RESET switch and four illuminating LEDs.
'POWER HEALTHY', green LED
•
Indicates the system is running. If this LED is extinguished the
system is not running.
'SYSTEM FAULT', yellow LED
•
When illuminated indicates there is a system fault.
'ALARM 1', red LED
•
When illuminated indicates alarm level 1 is exceeded.
'ALARM 2', red LED
•
When illuminated indicates alarm level 2 is exceeded.
The Gasflag contains two PCBs. The RELAY PCB is located in the back
of the shell, on the right hand side. This board contains the relays and
electrical connections. The second PCB is located in the lid of the shell,
on the left hand side. This CONTROL PCB contains the links to configure
the Gasflag, the test points for attaching a Digital Volt Meter (DVM) and
alarm level adjustment potentiometers.
The RELAY PCB contains the electrical connections for POWER IN,
POWER OUT (for daisy chaining Gasflag units) and SENSOR. It also
provides volt-free contacts for Alarm 1, Alarm 2 and Fault, and a
screwdriver for adjusting the alarm levels. All connections and earth
settings are clearly labeled on the PCB.
The Gasflag is supplied with a 50/60 Hz ac power supply unit of 230 V
input (E01777) and 110 V input (E01782). The power supplies have red
and black terminals for connecting to the Gasflag and provide 13 to 28 V
dc supply. The power supplies are suitable for powering up to two Gasflag
control panels.
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