The National Instruments part number 778572-71 identifies the PXI-2571, a highly versatile SPDT PXI Relay Module designed for industrial automation applications. This module features 66 independent channels, each equipped with electromechanical latching Form C relays that provide ordinarily closed (NC), ordinarily open (NO), and common (COM) terminals. With a maximum input current capacity of 1 A, the PXI-2571 is capable of switching loads of up to 100 VDC or 100 VAC, allowing efficient management of various automatic test equipment (ATE) loads within a single PXI frame or across multiple chassis setups. The module uses palladium-ruthenium contacts that are gold-covered for enhanced reliability and longevity. Its I/O connectivity is facilitated through a 200 POS LFH Matrix 50 receptacle, and it operates on a power requirement of 6 W at 5 V and 2.5 W at 3.3 V.

The onboard control logic allows for seamless relay operations, capable of downloading up to 1024 random scanning guidelines directly into the module's memory, thus enabling rapid scanning without requiring intervention from the controller. The module can either process the scan list once or loop continuously for maximum operational flexibility. Supporting a maximum switching power of 60 W or 62.5 VA (DC to 60 Hz) per channel, the PXI-2571 can sustain operation at the maximum current level across all channels within a temperature range of up to 55 °C. Furthermore, it is important to note that the minimum switch load requirement is 20 mV/1 mA, making this relay module a reliable solution for a variety of automation tasks.