sensotran, s.l.
GAS SENSORS AND TRANSDUCERS
ALARM PANEL
GASVISOR
Rev. GV v1.1
User Manual
Page 9 of 11
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Note:
When a parameter is modified, an icon appears to save the changes
with a floppy disk symbol.
4.4 RS-485 bus operation
Up to 32 detectors can be connected over RS-485 bus.
A different ID must be assigned to each detector first.
An external power supply must be provided to connect the detectors on an
RS-485 bus.
Wiring must be by means of a 4-wire cable with 2 wires for power supply and
2 for the communications bus (A and B).
4.5 General alarm operation
The GasVisor panel has 4 relays to activate 4 different alarms. The first three
are used as normal alarms and the fourth a fault alarm.
If the alarm is activated for any channel, it will be displayed in a different
colour, depending on the alarm tripped, and a bell symbol will appear in the
box corresponding to the channel. The value reading will continue to be
displayed.
Oxygen sensor alarms must be configured as descending for sub-oxygenation
levels (below 20.9%) and ascending for over-oxygenation levels (above
20.9%).
If connection to the sensor is lost for any reason, the fault alarm will be
activated and the text “FA” will be displayed. If this happens, the alarms on
Bus 1
Bus 2
Bus 3
Bus 4
