Abstract A power supply arrangement (2) with a first controlled power output (12) and a second controlled output (26) also has a controlled backup output (16) which is connected by means of a buffered bus with several read/write memories (8) of a computer (4). The read/write memories (8) of the computer (4) can be switched over to a stand-by mode in case of a power failure and connected with a backup battery (20). In accordance with the invention, the read/write memories (8) are switched during normal network operation to an active operating mode connected by means of a low-impedance switch (34) with the controlled power output (12). The low-impedance switch (34) is controlled by means of a switching signal (U S1 ). The backup battery (20) is connected with the controlled backup output (16) via a second switch (46) and a series controller (48).
A power supply arrangement of the type having a controlled operating power output and a controlled buffer output, the buffer output being connected to a plurality of read-write memories of a computer, the read-write memories being switched to a stand-by mode and connected to a back-up power source upon a failure of the line voltage, the improvement therein comprising: low impedance first switch means responsive to a first switch control signal for connecting the read-write memories for active operation to the power output during normal line conditions, and second switch means responsive to a second switch control signal for connecting the back-up power source via a first series controller to the buffer output.
Claim 2
Dependent Claim
113 words
A power supply arrangement of the type having a controlled operating power output and a controlled buffer output, the buffer output being connected to a plurality of read-write memories of a computer, the read-write memories being switched to a stand-by mode and connected to a back-up power source upon a failure of the line voltage, the improvement therein comprising: low impedance first switch means responsive to a first switch control signal for connecting the read-write memories for active operation to the power output during normal line conditions, and second switch means responsive to a second switch control signal for connecting the back-up power source via a first series controller to the buffer output.
Claim 3
Dependent Claim
56 words
The power supply arrangement as defined in claim 1, comprising: means including a load circuit comprising in a series connection a second series controller and relay for connecting the back-up power source to the buffer output, the common node of the second series controller and the relay being connected to an input of the second switch.
Claim 4
Dependent Claim
32 words
The power supply arrangement as defined in claim 1, comprising: means for preventing the second switch from opening before a first predetermined time period after the low impedance first switch is closed.
Claim 5
Dependent Claim
30 words
The power supply arrangement as defined in claim 3, comprising: means for preventing the low-impedance switch from opening before a second predetermined time period after the second switch is closed.