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PXI/PXIe USB 2.0 Hub with Connect/Disconnect

40-738/42-738

ISSUE 4.0  JUL 20

18

40-738-001/42-738-001 Module

Host Chassis Backplane

Host

Controller

USB Host

Controller

USB

Hub

5V Supply

Switch

Controller

PCI Bridge/

PCIe Packet

Controller

USB Power &

Data Switches

Data

Power

Port 1

Data

Power

Port 2

Data

Power

Port 3

Data

Power

Port 4

Data

Power

Port 5

Data

Power

Port 6

Data

Power

Port 7

Data

Power

Port 8

GND

Functional diagram for the 

40-738/42-738 

USB 2.0 Hub

•  Available as a PXI or PXIe Peripheral Module
•  Adds USB 2.0 Instruments & DUT Directly to 

Host Chassis

•  8 Port USB 2.0 Hub
•  Data Streams Directly From Controller’s Bus
•  USB Power On All Outputs
•  Programmatic Disconnect of USB Power and 

Data Using Pickering Interfaces Switch Driver

•  USB Data Connection Via Vendor USB Driver
•  3 Year Warranty

The 40-738 (PXI) and 42-738 (PXIe) are USB hubs that allow 

data to be streamed to and from USB devices by the system 

controller via the backplane of the host chassis.
The output ports can be connected or disconnected 

programmatically to simulate the connection of a USB device. 

Additionally, each port can connect and disconnect the power 

and data paths separately, simulating various faults. Our standard 

switch drivers provide a simple method of controlling the module. 

Each port supports up to 0.5A at 5V in accordance with the USB 

specification through a protected power switch.
The module can be used to connect USB devices under test or 

USB test equipment to the test system without reliance on the 

controller’s USB ports. By providing power on each port, the 

module allows the expansion of USB capacity without the need 

for a separate hub. Also, the host controller is protected from the 

connection of faulty devices under test.

The module provides a simple way of expanding the range of test 

equipment supported by PXI based systems to include USB power 

meters, USB data acquisition systems and USB scopes.

PXI Chassis Compatibility - 40-738

Compatible with all chassis conforming to the PXI and cPCI 

specification. Compatible with Legacy and Hybrid peripheral slots in 

a 3U PXI Express chassis.

PXIe Chassis Compatibility - 42-738

Compatible with all chassis conforming to the PXIe specification. 

Compatible with PXIe and Hybrid peripheral slots in a 3U PXIe 

Express chassis.
The 40-738 and 42-738 are not compatible with Pickering Interfaces 

LXI Modular Chassis.

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