Appendix A Specifications
Voltage
'MAX
(Steady-state current)
+5 V
400 mA
V+(+20 V nominal)
1.36 A
V—(+20 V nominal)
1.36 A
SCXI subsystem DC current capacity
Table A-2. Maximum Currents Available to SCXI Subsystem
Scaling the maximum current gives the
allotted current per slot as
follows:
V+ output1
7
0
mA
V— output1
7
0
mA
+5 V output5
0
mA
Reg
5
%
,
all outputs
Max ripple and noise1
%
from 0 to 20 MHz bandwidth
Over-current protectionC o n s t a n t current limiting at
140-150% of rated output
Over-voltage protection1
1
0
%
+ 0.5V for each output
Power supply unit mean time
between failure (MTBF)1 0 0 , 0 0 0 h at 75% load and 25 °C
ambient temperature
PXI Subsystem Cooling
Per slot cooling capacityS
l
o
t
cooling capacity in
worst-case slot is 20 W
Module cooling systemF
o
r
c
e
d
air circulation (positive
pressurization) via two fans
Slot airflow directionP
I to P2, bottom of module to top
of module
Module cooling intakeB
o
t
t
o
m
rear of chassis
Module cooling exhaustT
o
p
sides of chassis
PXI-1011 Chassis User Manual
A
-
2
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