AGS Merlin Instructions d'installation et d'utilisation - Page 7

Parcourez en ligne ou téléchargez le pdf Instructions d'installation et d'utilisation pour {nom_de_la_catégorie} AGS Merlin. AGS Merlin 16 pages. Refrigerant gas detector tft
Également pour AGS Merlin : Manuel d'utilisation et d'installation (5 pages), Manuel d'utilisation et d'installation (6 pages), Manuel d'installation et d'utilisation (12 pages)

Merlin Gas Detector Installation & Operation Instructions

Wiring to GDPX+ or GDP2X Controller

The detector must be earthed/grounded for electrical safety and limit the effects of R/F & EMC interference.

Where cable runs may exceed 100 yards from one control panel – Contact your supplier.

Ensure the 120-ohm termination resistance switch is turned on at each end of a cable run.

Daisy chain wires running to additional detectors.

The first and last device in the bus chain require a termination resistor.

[SHEILD WIRE] terminals should be used for terminating the end of a daisy chain and shield wire screwed

into any earth terminal on the control panel. Twist the shield wire to avoid stray shield wires.

A shielded and twisted 2 or 4 core cable is used to wire the MODBUS terminals [D+ & D-). The shielding can

be of 2 types: braided [mesh of thin conducting wires] or foil (consisting of a thin sheet of metal covering the

twisted wires). One example of such cable is BELDEN 3082A. Any cable with similar characteristics can be

used to connect all the devices together. If you are encountering noise or irregular problems with a bus link,

the problem is likely related to grounding, incorrect shielding or wiring mains power cables next to data

cables.

Reversing the [D+] and [D-] connections of any device can lead to the whole system to stop working owing

to reverse polarity found on the terminals.

Page 7 of 16

Rev 01