AGS Parksafe Control Panel Installation Operation & Maintenance - Page 10

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AGS Parksafe Control Panel Installation Operation & Maintenance
Installation, Operation & Maintenance

Installation Tips

CONNECTION
The best way to connect devices in a MODBUS RTU is a 'DAISY CHAIN' method.
MAXIMUM DISTANCE
You may encounter problems when powering gas sensors beyond 500 yards from one control panel, in this instance,
contact your supplier.
TERMINAL RESISTANCE
Signal communication issues may occur. 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 switches.
GROUNDING
If you are encountering noise or irregular or abnormal problems with a Modbus link, the problem is likely related to
grounding, incorrect shielding or wiring main power next to Modbus wiring. To ground the data cable, the shield should
be connected to [-] of the chain terminals including the control panel.
CABLES TO USE
A shielded and twisted pair cable is used. The shielding can be of 2 types: braided [like a mesh of thin conducting wires]
or like a foil [consisting of a thin sheet of metal covering the twisted wires].
PROTECTION
High concentrations of alcohol found in many products may damage, deteriorate or affect the gas sensing elements of
Detectors – such as; wine; deodorants; stain removers; thinners etc.
IDENTIFICATION
Remember to individually ID each connected detector by configuring the ID switches on the circuit board. Make a plan,
map and/or note of the location of all connected detectors for tracing and locality purposes.

Trouble Shooting

ISSUE
Panel searches for detectors at start
up but doesn't establish connection
Rev: 13
0721
POSSIBLE CAUSE
Broken data cable in the chain.
Gas sensing module not properly connected
in one or more detectors.
Parksafe Control Panel
CHECK
Cables connected are secure and in the
correct terminals.
Ensure the gas-sensing module installed has
not come loose.
Press the rescan button on the panel.
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