52 (93) TX3 Touch Screen Installation Manual Version 3.4
Copyright 2015 LT-996
Touch Screen System and Setup
3.1 Touch Screen System
The TX3 Touch Screen may be networked with a combination of Telephone
Access and Card Access Units through a peer-to-peer RS-485 connection.
Touch Screen is capable of providing ADC or NSL telephone 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: Install all transformers and power supplies outside the Touch
Screen enclosure.
All wiring is a maximum length of 1000 ft. The RS-485 wiring maximum length
is 4000 ft.
All units use the MD-990 power supply. Refer to section 2.7 Installing the Power
Supply Enclosure on page 46 or document LT-1094 Power Supply Voltage
Selection. The door strike power supply depends on the door strike power
requirements.
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