Figure 16. Power Supply - Mircom TX3 Series Installation And Operation Manual

4.2.7 Power Supply
The power supply connection is situated at the bottom right of the main controller
board and receives 16 Vac, 40 VA. An external PS-4 or PS-4P plug-in
transformer connects to the power terminals. Refer to Figure 13 and Figure 16.
Version 1.6 Telephone Access System Installation and Operation Manual
LT-969 Copyright 2012
OFF
ON/OFF Switch
16 Vac IN
Note: Use 18 AWG
ON
SW2
16 Vac
16 Vac transformer
(PS-4 or PS-4P)

Figure 16. Power Supply

Lobby Control Unit Setup
120 Vac
43 (112)