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System Notes – 2 wire COLOR with Single Custom Panel Entry
If you require more than 3 VSP333-3 Units, please use MXV333 instead. Contact Alpha
Communications® for more information.
The TT33-2 SPEAKER/MICROPHONE/ CONTROLLER allows you to use QwikBus™ with a
custom panel or existing dry contact type entry panel by converting the button presses to a
digital signal through an electronic matrix. This matrix is discussed in detail on Page 13.
A Single Panel Entry system requires the following dipswitch settings on the TT33-2 unit:
Switches 4, 5, & 6 identify the entrance number (all OFF = Entrance 1)
Switch 3 If the door strike is to be connected to the SP333 (Tö1) = OFF
For more information refer to Page 10 - Dipswitch Settings.
Be sure that the End of Line Jumpers are used on the camera circuit board and in the last
monitor on each riser. If the last unit on a riser is an audio only unit, the End of Line Jumper
would still be used on the last monitor on that riser. This is important for best picture quality.
For more information refer to Page 12 - End of Line Jumper Locations.
NOTE: When using a Coaxial cable into a KBS3-2, ALWAYS connect a 75Ω (for RG-59) or
50 Ω (for RG-6) End-of-Line resistor between the coax center lead terminal and the (
terminal on the KBS3-2. Failure to do this may cause degradation of the video signal.
When connecting C333-2 harness between SP333 and SNT333, ALWAYS observe 24VDC Polarity.
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