Installation Prerequisites; Touch Screen System - Mircom TX3 Series Installation Manual

3.1

Installation Prerequisites

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3.2

Touch Screen System

The TX3 Touch Screen may be networked with a combination of Voice Access
and Card Access Units through a peer-to-peer RS-485 connection.
Touch Screen is capable of providing ADC or NSL voice access from a single
panel or from a networked system. Each outside telephone line requires a
separate line to the control panel inside the Touch Screen.
The following figures depict various Touch Screen network scenarios.
Note:
All wiring is a maximum length of 1000 ft. The RS-485 wiring maximum length
is 4000 ft.
All units use the TX3-PS24-5A power supply. Refer to section 2.11 on page 67
or document LT-1094 Power Supply Voltage Selection. The door strike power
supply depends on the door strike power requirements.
TX3 Touch Screen Installation Manual
Verify that the building telephone infrastructure is operational. When
wiring an NSL installation it may be necessary to check each resident's
line.
Ensure there is a provision for a ground circuit. The Voice Access System
assembly must be grounded by a qualified electrician. An improperly
grounded unit can result in equipment malfunction and void the warranty.
Use the latest Voice Access System controller firmware. Mircom
periodically updates panel firmware and Configurator Software to add
features and correct any minor inconsistencies. For information about the
latest firmware or software visit the 'Manuals and Downloads' section of
the Mircom website at www.mircom.com.
Install all transformers and power supplies outside the Touch
Screen enclosure.
Mircom recommends using a 500 VA uninterruptible power supply
with 15 inch Touch Screens, and a 1000 VA uninterruptible power
supply with 22 inch Touch Screens.
Touch Screen System and Setup
71