Cooper 9940 Installationsanleitung PDF herunterladen (Seite 5)

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Installation

Cabling Keypads

Cooper Security recommend that you use 8-core 7/0.2 or 16/0.2 alarm cable for

wiring keypads

You can connect the keypads in either a star or bus conﬁguration. If you are

intending to use long cable runs then Cooper Security recommend that you use

star wiring with no more than 200m of cable per branch.

Siting Restrictions (9940 only)

The 9940 keypad contains a coil inside the case that acts as the sensor for

proximity tags used to set and unset alarm systems. The coil works at a low radio

frequency and has a spherical detection pattern of roughly 120mm radius. This

detection sphere can extend through wood, brick, plaster, glass and plastic walls.

Electromagnetic devices, including other 9940 or 9950 keypads, can interfere with

the operation of the coil.

When siting the keypad:

Avoid magnetic devices, for example: electric motors, door releases,

microwave detectors or ovens.

Avoid large metal structures. Remember that screwing a keypad to a metal

frame may signiﬁcantly alter the detection range

Avoid ﬁtting keypads anywhere near an entryphone, loudspeaker, PA

system, or other proximity reader or security tagging system

Do not put two keypads back to back even if there is a wall between them

If any of these conditions are present, you should test the operation of the keypad

with a prox tag at the proposed site before permanently installing the keypad.

In addition, remember to warn users that holding a mobile phone in the same

hand as a tag may seriously affect the reading performance.

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Cooper 9940 Installationsanleitung Seite 5