Figure 29 Rs-485 Add-On Module - Mircom TX3 Series Installation And Operation Manual

The module has an RS-485 connector as shown in figure 29.
RS-485 Add-on
Module
Figure 29. 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.
Table 1: RS-485 Add-on Jumper Settings
Mode
No termination
AC termination 120R + 1nF
No termination
DC termination 120R (Factory Default)
Note: For the main application of the RS-485 Add-on Module, JW1 and
JW2 should both be shorted.
TX3 Telephone Access System Installation and Operation Manual
Lobby Control Unit Setup
JW1 JW2
Open Open
Short Open
Open Short
Short Short
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