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BF Apartment Station 1 Way System
PD-167 Issue 1B
Installation and Operating Manual
Page 10 of 44
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 apartment station, 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 apartment station (standard
kit)
1 x BFD1 door controller
1 x PS4 12V 4A power supply
2 doors and 1 apartment station
2 x BFD1 door controller
1 x PS4 12V 4A power supply
3 doors and 1 apartment station
3 x BFD1 door controller
2 x PS4 12V 4A power supply
Up to 3 extension apartment stations not
displaying picture during ring
No extra power supplies required
Any number of extension apartment
stations displaying picture during ring
1 x 340C 12V 1.5A power supply per
extension apartment station
2 doors and 6 apartment stations all to
display picture during ring
2 x BFD1 door controller
1 x PS4 12V 4A power supply
5 x 340C 12V 1.5A power supply