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Chapter 3 Connector and LED Information
PCI Express Device Disk Drive Power Connector
(NI PCIe-632
x/634x/635x/636x Devices, not including PCIe-6346) The disk drive power
connector is a four-pin hard drive connector on some PCI Express devices that, when connected,
increases the current the device can supply on the +5 V terminal.
Note To ensure the best performance and accuracy for the PCI Express X Series
device, temperature regulation is required. For more information, refer to the
document Guidelines for Temperature Management of PCIe Devices, by going to
ni.com/info and entering info code PCIeCooling.
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 accessory without an external power supply, such as the SC-2345
Refer to the device specifications 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 Guide for PCI/PCI Express. 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 3-2.
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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