AGS Parksafe Control Panel Установка, эксплуатация и обслуживание - Страница 10

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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.

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.