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3-5
+5 V Power Source
The +5 V terminals on the I/O connector 5 V referenced to D GND. Use these terminals
to power external circuitry.
Caution
Never
connect the +5 V power terminals to analog or digital ground or to
any other voltage source on the X Series device or any other device. Doing so can
damage the device and the computer. NI is
not
liable for damage resulting from such
a connection.
The power rating on most devices is +4.75 VDC to +5.25 VDC at 1 A.
Refer to the device specifications to obtain the device power rating.
Note
(PCI Express X Series Devices)
Some PCI Express X Series devices
supply less than 1 A of +5 V power unless you use the disk drive power connector.
Refer to the
PCI Express Device Disk Drive Power Connector
information.
USER 1 and USER 2
The USER 1 and USER 2 BNC connectors allow you to use a BNC connector for a digital or
timing I/O signal of your choice. The USER 1 and USER 2 BNC connectors are routed internally
to the USER 1 and USER 2 screw terminals, as shown in Figure 3-1.
Figure 3-1.
USER 1 and USER 2 BNC Connections
U
S
ER 2 BNC
D GND
AI
S
EN
S
E
AI GND
+5 V
D GND
U
S
ER 2
U
S
ER 1
CH
S
GND
AI
S
EN
S
E 2
APFI 0
Intern
a
l
Connection
U
S
ER 1 BNC
D GND
S
crew
Termin
a
l
Block
Summary of Contents for 6368
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