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Installation & Operation Manual
Gas Detector ID Switches
When wiring multiple detectors in a chain it is important to identify
each and every detector installed for the control panel to receive
and display accurate data corresponding with the correct
detector type.
The ID configuration diagram is printed onto detector boards for
quick reference. All detectors are factory set to ID1.
ID Switches must be configured for each and every detector
connected to receive and display accurate data!
We recommend a plan, map and/or marking the detector enclosures detailing ID and location!
120ohm Termination Resistance
Signal communication issues may occur where the bus length is too long, high baud rates are
used or signal reflections are occurring. To avoid this, terminating at each end of a chain may
help the quality of the data signal by turning on the 120ohm terminal resistor switch of the last
device in the chain.
In some cases, it is also required to turn on the resistor of the first device also,
e.g. If a split chain is used, terminate the last detector in each chain. If a single
chain is used, terminate the first (panel) and last (detector) device.
Settings Switch
On the front fascia circuit board you'll find a SETTINGS dip-switch – when switched to ON, the
screen will display the settings menu – you can now configure your GDP2X.
To view, change and save settings, you must provide mains power to [POWER/LINE IN].
When changes have been made – turn the SETTINGS switch OFF and the system will
automatically restart.
Settings Menu
The GDP2X has a touch screen which allows the engineer/ user to configure the system.
Adjust the screen brightness.
Press or slide the cursor up and down.
When changes have been made – turn the SETTINGS switch OFF and the system will restart.
GDP2X - IOM Iss: 5 06-20
Change/Select option
Press the blue option box or press and hold.
Merlin GDP2X
8
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