The module has an RS-485 connector as shown in figure 38.
Figure 38. RS-485 Add-on Module
For a description on how to install the RS-485 Add-on Module see the USB to
RS-485 Adapter Installation Instructions LT-6027.
Note:
4.7
Guard Phone Module
The TX3-GPM Guard Phone Module mounts above the TX3 Lobby Control
Unit main board on the top left hand side. See figure 27.
Note:
The module has two connectors, an RJ-11 connector and a ribbon cable as shown
in figure 39.
62
TX3 Telephone Access System Installation and Operation Manual
LT-969
Copyright 2019
RS-485 Add-on
Module
Table 1: RS-485 Add-on Jumper Settings
Mode
No termination
AC termination 120R + 1nF
No termination
DC termination 120R (Factory Default)
For the main application of the RS-485 Add-on Module, JW1 and
JW2 should both be shorted.
The Guard Phone Module works only on NSL systems.
Lobby Control Unit Setup
JW1
JW2
Open
Open
Short
Open
Open
Short
Short
Short
Version 5.4
Need help?
Do you have a question about the TX3 Series and is the answer not in the manual?
Questions and answers