The National Instruments part number 778572-48 designates the PXI-2548, a high-performance PXI RF Relay Module optimized for applications requiring reliable signal integrity. This module operates over a bandwidth of 2.7 GHz, maintaining an exceptional insertion loss of less than 1.0 dB (typically 0.7 dB) and a voltage standing wave ratio (VSWR) of less than 1.7 (typically less than 1.5). Engineered as a Quad SPDT RF Relay Module, the PXI-2548 facilitates flexibility in switch networks and ensures that multiple channels benefit from consistent signal paths, making it ideal for constructing high-channel-count multiplexers. The onboard relay counting feature enhances the usability by allowing for proactive monitoring of relay lifespan, thus reducing the risk of unexpected downtime. With a maximum relay operating time of 10.4 milliseconds and a scanning capability of up to 45 channels per second, the PXI-2548 is designed for rapid data acquisition and processing.

The module is equipped with 12 gold-plated SMA connectors that provide convenient access to all channels, along with a 2x2 Micro-Fit connector for integration with a PXI Digital Multimeter (DMM). Accompanying driver software offers a user-friendly interface for configuring resistance in non-linear units such as temperature or resistance, enabling efficient control without needing to manage individual relays directly. Designed for Hardware-in-the-Loop (HIL) testing, the programmable resistors within the PXI-2548 can simulate a variety of resistance-based devices including potentiometers and RTDs. The overall resistance on each channel is adjusted by selecting discrete resistors through relay pathways, ensuring a responsive configuration for diverse testing scenarios. This versatile module operates under a power requirement of 3.7 W at 5 V and 0.3 W at 3.3 V, making it a valuable addition to modern industrial automation and control systems.