Service manual

58 E8408A Product Specifications Appendix A
Power Specifications
This section describes E8408A mainframe power specifications for the
Standard and Option 001 configurations. The total power delivered from the
Option 001 configuration cannot exceed the total power delivered from the
Standard configuration.
Total Usable Power
Peak and Dynamic
Current
Temperature Usable Power (90-264 Vac)
1
0 - 40°C 175 W
40 - 50°C 150 W
50 - 55°C 125 W
1
Total output before thermal shutdown or safety limitation.
Voltage Peak Current I
MP
(Amps)
1,2
Dynamic Current I
MD
(Amps)
1,3
Standard/Option 001 Standard Option 001 Standard Option 001
+5V
4,5
+12V
7
- 12V
7
+24V
- 24V
6
-5.2V
5
- 2V
17A
2.7A
2A
2A
2A
2A
2A
19.4A
2.7A
2A
2A
0.5A
5.8A
2A
2.5A
1.0A
0.8A
1.0A
1.0A
1.0A
1.0A
2.5A
1.0A
0.8A
1.0A
0.25A
1.0A
1.0A
1
Specifications apply at the mainframe backplane, 0 - 55°C.
2
I
MP
= Rated mainframe peak DC output current as defined by the VXIbus Specification.
3
I
MD
= Rated mainframe peak-to-peak dynamic current as defined in the VXIbus Specification by a
current vs. frequency curve.
4
+5V must have 1.0A minimum load for other supplies to be in regulation specification.
5
(Standard Only) Maximum +5V current can be increased if -5.2V load is less than 2.0A maximum
Maximum = 17.0A +1.2*(2.0A - Load on -5.2V).
6
(Option 001 Only) Maximum -24V current can be increased if -5.2V load is less than 5.8A maximum
Maximum = 0.5A +0.24*(5.8A - Load on -5.2V).
7
Maximum +12V current can be increased if -12V load is less than 2.0A maximum
Maximum = 2.7A + 1.2*(2.0A - Load on -12V)