The National Instruments 778572-70 PXI-2570 SPDT Relay Module is a versatile 40-channel Single-Pole Double-Throw relay solution designed for advanced signal routing applications. It supports a maximum switching voltage of 100 volts across both channel-to-channel and channel-to-ground connections, and can handle a maximum switching power of 60 watts or 62.5 VA per channel, with a maximum switching or carrying current of 1 ampere. The module is built to endure harsh electrical conditions, offering an impulse voltage rating of up to 500 volts. With a maximum operating time of 3.4 ms and a typical rating of 1 ms, it delivers efficient performance with a mechanical life expectancy of 100 million cycles and an electrical life expectancy of approximately 2.5 million cycles at 10 volts DC. The electromechanical latching relays utilize palladium-ruthenium and gold-covered contact materials, ensuring low contact resistance and enhanced durability.

This module also features input and output trigger capabilities, allowing for precise synchronization with other connected devices. It accepts trigger inputs from PXI trigger lines 0 to 7 with a minimum pulse width of 150 ns, while output triggers can be programmed with pulse widths ranging from 1 μs to 62 μs. Designed for integration within a 3U PXI or CompactPCI chassis, the module occupies a single slot with dimensions of 21.6 cm × 2.0 cm × 13.0 cm (8.5 in. × 0.8 in. × 5.1 in.) and weighs approximately 155 g (5.5 oz), making it compact and easy to handle. It operates efficiently at a power consumption of 6 watts at 5 volts or 2.5 watts at 3.3 volts from the PXI backplane. The operating temperature range extends from 0 to 55 degrees Celsius, while storage temperatures can range from -20 to 70 degrees Celsius. For optimal performance, it is advised to install this module in a clean environment as it lacks an Ingress Protection rating.