Myalarm V-LCD1 Manuel d'instructions télécharger pdf (Page 33)

INSTALLATION

5-27

System 2 Installation / Programming Manual

Keypad Styles

Choose one of seven Corby Keypads.

Indoor Keypads:

4020 - flush mount, with one green and one red LED.

4014 - surface mount hidden view, with one green and one red LED.

Outdoor Keypads:

4012 - flush mount, aluminum housing, green and red LED and a night light.

4064 - surface mount, heavy duty, mounted in a lock box, green and red LED.

4066 - flush mount, heavy duty for high usage, green and red LED.

Keypad Wire Runs

Keypads may be 1000 feet from the System 2. Wire must be multiconductor (not twisted pairs) and MUST be

8 conductor shielded. (Refer to Figure 14).

Keypad Ground

All System Keypads have an earth ground screw terminal for attaching the foil shield drain wire of the

multiconductor cable. Do not connect this drain wire to the metal Keypad plate. Connecting a separate earth

ground at both ends of the multiconductor keyboard cable is undesirable. The foil shields should only be

connected to Terminal #1 of the System 2, which must be connected to an earth ground. (Refer to Figure 14).

CAUTION: The section of shield which is exposed, after stripping the cable, must be insulated to

protect it from shorting out any components of the circuit board. Use a piece of heat shrink

tubing, a piece of cable jacket or electrical tape. (Refer to Figure 7). This is extremely

important when cables enter the cabinet under the circuit board.

The connection from the stripped end of the cable to earth ground (Terminal #1) should be

as short as possible. The longer the drain wire the less effective the shield.

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Myalarm V-LCD1 Manuel d'instructions Page 33