Part Number: 778572-69 The National Instruments 778572-69, also known as the PXI-2569, is a high-density, general-purpose relay module designed for medium power automated testing applications. This PXI relay module features 100 independent single-pole single-throw (SPST) Form A relays, each equipped with high-performance palladium-ruthenium contacts coated with gold, ensuring robust and reliable connections. The module achieves a maximum switching power of 60 W, or 62.5 VA, at frequencies up to 60 Hz and can withstand a maximum switching voltage of 100 V, applicable both channel-to-channel and channel-to-ground. Additionally, it supports a maximum current of 1 A per channel for both switching and carrying operations. The 778572-69 provides specifications suitable for high-precision applications, including an initial DC path resistance of less than 0.55 ohms and a minimum end-of-life resistance of 1.0 ohm, alongside a thermal electromotive force (EMF) typically below 12 μV. Its impressive bandwidth capabilities extend to a -3 dB point of at least 20 MHz, demonstrating minimal crosstalk with values of -85 dB at 10 kHz, -65 dB at 100 kHz, -45 dB at 1 MHz, and -25 dB at 10 MHz, ensuring excellent signal integrity even at high frequencies. For triggering needs, the module leverages PXI trigger lines <0...7>, allowing for input triggers with a minimum pulse width of 150 ns, while output triggers with software-selectable pulse widths from 1 µs to 62 µs further enhance sequencing and synchronization flexibility. Connectivity is managed through a 200 POS LFH Matrix 50 receptacle. Designed for indoor use, the module operates effectively within a temperature range of 0 °C to 55 °C and a non-condensing relative humidity range of 10% to 90%. It can be stored under non-condensing conditions with relative humidity levels between 5% and 95% and temperature ranges of -20 °C to 70 °C. With a 32,000-step scan list for deterministic scanning, the 778572-69 is fully software programmable, making it an ideal solution for applications that require high relay density and automated test configurations.

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