Chapter 3 Connector and LED Information
X Series User Manual 3-4 ni.com
Note (PCI Express X Series Devices) 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 section for more information.
PCI Express Device Disk Drive Power Connector
(NI PCIe-632x/634x/635x/636x Devices)
The disk drive power connector is a
four-pin hard drive connector on PCI Express devices that, when connected,
increases the current the device can supply on the +5 V terminal.
When to Use the Disk Drive Power Connector
PCI Express X Series devices without the disk drive power connector
installed perform identically to other X Series devices for most applications
and with most accessories. For most applications, it is not necessary to
install the disk drive power connector.
However, you should install the disk drive power connector in either of the
following situations:
•You need more power than listed in the device specifications
•You are using an SCC accessory without an external power supply,
such as the SC-2345
Refer to the specifications document for your device for more information
about PCI Express power requirements and current limits.
Disk Drive Power Connector Installation
Before installing the disk drive power connector, you must install and set
up the PCI Express X Series device as described in the DAQ Getting
Started guides. Complete the following steps to install the disk drive power
connector.
1. Power off and unplug the computer.
2. Remove the computer cover.
3. Attach the PC disk drive power connector to the disk drive power
connector on the device, as shown in Figure 3-1.
Note The power available on the disk drive power connectors in a computer can vary. For
example, consider using a disk drive power connector that is not in the same power chain
as the hard drive.
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