INTELLIGAS
Gas safety & control systems
intelligas.co.uk
INST
ALL
ATIONGUIDE
GDMS 2
Product Overview
The Intelligas GDMS is a 4 zone gas detection system capable of powering and interpreting detectors of all industry standard types.
4-20ma (3 wire), 0-10 volt (or 2-10v) or switched input type detectors can be connected to the system.
The system has an onboard emergency stop, inputs for additional emergency stops, thermal links and fire alarm.
Additionally the system has outputs for strobe warning lights & sounders. Signalling relays are provided to alert that thermal links
have been operated, pre-alarms and full alarms. Additionally a gas valve output is provided in order to isolate gas supplies where
necessary.
Setting up zone attributes
Each zone needs to be individually setup for each detector type necessary. First of all, setup the input type
using the jumper links next to the terminals.
Once the jumpers have been set for each zone the dip switch must also be set. Use the first bank of 4
switches. The switch for each zone chooses between 4-20ma (on / up) or 0-10v / switched input (off / down)
Once this has been done the system needs to be told which zones are in use, use the second set of dip
switches to select each zone (on / up for zone in use. Off / down for not in use)
Once all these steps have been completed the system can be powered up (please note that changes to the
dip switches settings are only accepted on power up. Any settings changed will require the panel to be
switched off and back on again.
Setting the alarm trip points
Use the pots marked for each zone to set the trip points. E.G. you have a CO2 detector that is 0-10v over a 0-5000ppm scale and
you want the alarm to go off at 2500ppm. That is a set point of 50% of the 0-10v scale. Therefore the pot should set to 50% of its
scale. The software will then automatically set a pre alarm to 75% of the alarm set point.
0-10 volts
4-20 ma
Switched
input (N/C)
