bell
issimo
1 Way Video Entry System
PD-097 Issue 4
Installation and Operating Manual
Page 10 of 40
Separately Powered Videophones
The limitation of up to 4 videophones ringing but only one displaying, as indicated in the
power supply and cable distance tables on page 12, can be overcome by the use of
supplementary power from a 340C.
Power Supply Requirements
The system is powered by 12V power supplies only: -
Model PS4 12V, 4A.
Model 840
12V, 4A battery backup supply.
Model 340C 12V, 1.5A optional for extensions.
Note 1. The 28V referred to on the videophone, video controller and wiring diagrams is
internally generated in the controller. DO NOT use any power supply other than 12V or
damage may occur.
Note 2. The PS4 power supply has been specifically designed to operate with the high-
surge requirements of the system. Bell System is unable to guarantee functionality or
provide support for systems which use third party power supplies.
Exact power supply requirements depend upon many factors. The number of power
supplies included within a standard ‘kit’ or quotation assumes that all controllers are
installed in one location and that there are no extensions.
The following table gives examples of the controllers and power supplies for a given
number of entrance doors and extensions.
System
Controllers and Power Supplies
1 door and 1 phone (standard kit)
1 x BSD1 door controller
1 x PS4 12V 4A power supply
2 doors and 1 phone
2 x BSD1 door controller
1 x PS4 12V 4A power supply
3 doors and 1 phone
3 x BSD1 door controller
2 x PS4 12V 4A power supply
Up to 3 extension phones not displaying
picture during ring
No extra power supplies required
Any number of extension phones displaying
picture during ring
1 x 340C 12V 1.5A power supply per
extension phone
2 doors and 6 phones all to display picture
during ring
2 x BSD1 door controller
1 x PS4 12V 4A power supply
5 x 340C 12V 1.5A power supply
