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National Instruments Corporation
25
NI sbRIO-9601/9602/9602XT User Guide
Power Limits
Caution
Exceeding the power limits may cause unpredictable behavior by the device.
5 V pins (P2, P3, P4, P5)........................ +5 V ±5%,
2 A max (shared with C Series
modules)
Power Requirements
The NI sbRIO device requires a power supply connected to connector J3.
Refer to Figure 4 for the location of J3. Refer to the
section for information about connecting the power supply.
Power supply voltage range ................... 19–30 VDC
1
Power supply current limit ..................... 1.8 A
Power connector internal fuse................ 2 A non-replaceable
Total power requirement
=
P
int
+
P
DIO
+
P
5V
+
P
CSer
where
P
int
is the consumption by sbRIO internal operation
P
DIO
is the consumption by the 3.3 V DIO
P
5V
is the consumption by the 5 V voltage output
P
CSer
is the consumption by installed board-only C Series
modules
Note
You must add 20% to the calculated or measured total power requirement to account
for transient and startup conditions.
Maximum
P
int
......................................... 6.0 W
Maximum
P
DIO
....................................... 1.28 W
P
DIO
=
Total DIO Current
×
3.3 V/0.85
Maximum
P
5V
........................................ 11.1 W
P
5V
=
Total 5 V Output Current
×
5 V/0.9
Maximum P
CSer
...................................... 3.3 W; each installed C Series
module consumes up to 1.1 W
1
The NI sbRIO device is 1–2% more efficient with a 19 V supply than with a 30 V supply.