The TT33-3 from Alpha is a QwikBUS Panel Speaker/Microphone unit used with the S.T.R. QwikBUS systems to provide intercom functions at remote door entry locations, and depending on system configuration, optional electric door opener(s) etc. The TT33-3 powers from the associated model# SP333 QwikBUS Intelligent Controller unit(s), and does not require any additional power supply unit(s). When used with conventional pushbutton type door entry stations where electric door release is required, the TT33-3 will also require a model# T1240 U.L. Listed 12VAC plug-in transformer. The TT33-3 speaker/microphone is designed to easily mount right behind the faceplate in various models of our lobby entry pushbutton style intercom panels. The TT33-3 speaker/microphone also feature a built-in door release relay, voice volume control potentiometer and a plug-in connector for connection to the model# E32 32 station 2-wire extender(s). The PC boards are treated with a special chemical finish, to minimize the affects of weather and moisture on the electronic components.
Alpha TT33-3 Speaker/Microphone Features
Easily Installs Right Behind Lobby Entry Panel: Simplifies installation and saves space for a clean look.
Operates on Safe Low-Voltage Class II Wiring: Ensures safety and compatibility with existing systems.
Clear Voice Fidelity with Adjustable Voice Volume Controls: Provides customized audio levels for better communication clarity.
Convenient Screw Terminal Connections: Allows for quick and secure wiring connections.
High quality Half-Duplex Voice Communications: Facilitates effective two-way communication without interference.
TT33-3-Specsheet
Tools & Calculators