Overview

The PXB-721 is a high-density PXI/cPCI digital I/O module designed for simultaneous handling of digital logic signals. It provides robust, high-speed interfacing between host software and physical devices, supporting system control, status monitoring, and pattern generation/capture. Its high channel count and PXI/cPCI form factor make it ideal for automated test systems, industrial control, and defense applications requiring precise synchronization of numerous discrete digital lines.

Technical Data: 

Typical Applications

The PXB-721 is used in automated test equipment (ATE) and industrial control systems where high-speed, high-channel-count digital I/O is required:

• Semiconductor device testing (rapid toggling and monitoring of multiple pins)

• Avionics and defense system simulations

• Functional verification and hardware control of complex digital circuits

It ensures precise timing, synchronization, and low-latency control across all digital lines.

FAQ

Q1: What is the main advantage of using a PXI/cPCI module like the PXB-721?
A: Provides high performance and synchronization via direct access to the PCI bus and shared system clocks, enabling precise timing and low-latency control.

Q2: Can the digital lines be individually configured as input or output?
A: Yes, lines are grouped into ports (e.g., 8- or 16-bit). Each port’s direction is software-selectable for flexible configuration.

Q3: Does the PXB-721 require external conditioning hardware?
A: TTL-compatible signals can be directly connected. Non-TTL signals (12V/24V) or high-current loads require external conditioning modules for protection.

Q4: How does the PXB-721 handle high-speed data acquisition?
A: On-board FIFO memory and direct PXI/cPCI bus access (DMA) enable high-rate streaming and capture without burdening the host CPU.