Myalarm V-LCD1 Manuale delle Istruzioni Scaricare il pdf (Pagina 32)

INSTALLATION

5-26

System 2 Installation / Programming Manual

Keypads

Overview

Keypads are designed to be flush or surface mounted on a wall about 60 inches above the floor level. They

have factory installed LEDS to provide the end user with visual feedback of the door/relay status. If the

Keypad is an outdoor version and will be mounted in a humid location, protect the wire terminals from

corrosion by applying a light coat of silicone grease or other protective caulk to the terminals. They may be

installed in standard electrical back boxes or on surface boxes using standard electrical hardware. Use the

supplied mounting template, nylon or lead plugs, and screws.

Keyboard data is BCD encoded and multiplexed making code duplication virtually impossible by shorting or

crossing data lines. Tamper-proofing schemes are not necessary. Custom back boxes are available from

Corby.

Status LEDS

Keypads have LEDS to indicate door operation. Most have a red and green LED. The System activates the

green LED when the door opens and the red LED when the door closes, ie. in a flip/flop fashion. It may be

desirable to operate only one LED since an illuminated red LED may attract attention in an outdoor application.

All LEDS have built-in resistors and will operate at 12VDC @ 18ma. The yellow lead is negative and the red

lead is positive.

Back To Back Keypads

It is also possible to install two Keypads back to back at the same door by wiring both Keypads in parallel and

connecting both of them (with only one home run) to the same System 2. This type of installation will open the

door anytime a valid code is used at either of the Keypads but will only show the port used as a single port.

This specific type of installation does not support Anti-Passback or in/out reports and requires the use of a

code to open the door from any direction.

Anti-Passback with Digital Keypads

The Anti-Passback feature requires two Keypads to be used at each door (one inside the protected area and

one outside). The outside Keypad is connected to Port 1 and the inside Keypad to Port 2. Users must first

enter using Keypad #1 before they can exit using Keypad #2.

Keypad Tamper Methods

If the Keypad will be mounted outside in a public area subject to vandalism, or if it could be removed from the

original installation site by unauthorized personnel, it is recommended that a backbox with tamper switch(s) or

tamper screws be used in conjunction with an alarm circuit to secure the installation. Use a Corby Model 11,

12 or 14 backbox.

Note: Keypads were not investigated by UL during the testing of this product.

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Myalarm V-LCD1 Manuale delle Istruzioni Pagina 32