H7848 Power Supply
From Computer History Wiki
The H7848 Power Supply is used on the following computers resp. options:
- MicroVAX 2000
- VAXstation 2000
- TK50Z-F Tape Expansion Box
- RD53-F/RD54-F Disk Expansion Boxes
- RZ55-F Expansion Box
Model H7848-AA is for nominal 115 V input and model H7848-AB is for nominal 230 V input.
The power supply assembly includes an ac power connector, an ac power switch, and a variable-speed cooling fan.
| Output Power Ratings / Noise | |||||
|---|---|---|---|---|---|
| Voltage (V) | Current (A) | Noise (mV) | |||
| Nominal | Minimum | Maximum | Minimum | Maximum | Maximum |
| +5.10 | +4.85 | +5.35 | 3.00 | 10.00̣̣̣ | 50 |
| +12.10 | +11.50 | 12.70 | 0.50 | 4.00 | 70 |
| -12.00 | -11.40 | -12.60 | 0.00 | 0.25 | 120 |
| -9.00 | -8.55 | -9.45 | 0.00 | 0.20 | 50 |
- If the + 12.1 Vdc is limited to 3.0 Amps maximum, the +5.1 Vdc can supply up to 12.0 Amps.
- If the + 12.1 Vdc is limited to 2.0 Amps maximum, the +5.1 Vdc can supply up to 13.0 Amps.
For options that to not provide the minimum loads, there is the 54-17163 Loads Board:
- 5V, 3A
- 12V, 1A
The board can be jumpered (using 0 Ohm resistors) to either loads or both.
