Part Number: 778572-20

The National Instruments 778572-20 is a high-performance PXI Relay Module, specifically designated as the PXI-2520. This versatile module features 80 independent single-pole single-throw (SPST) Form A armature relays, each capable of handling a maximum switching current of 2 A per channel. Designed for automated test equipment (ATE) applications, the PXI-2520 offers low on-resistance and minimal thermal offsets, thanks to its non-latching relay design. Fully programmable through software, the module supports onboard relay count tracking, facilitating efficient monitoring and management of relay states.

The PXI-2520 is equipped with electromechanical relays constructed with palladium-ruthenium contacts, layered with gold for enhanced conductivity and longevity. It offers a switching power capacity of up to 60 W or 62.5 VA for DC to 60 Hz applications, making it suitable for controlling various devices such as heaters, lights, and fans. Interface connectivity is assured through a robust 160-position, male DIN 41612 I/O connector. The module requires a power input of 6 W at 5 V and 2.5 W at 3.3 V.

It is important to note that the power must be completely cycled to ensure that the module and its components are fully discharged, necessitating a shut down of both the controlling PC and the chassis. This procedure is crucial, as the module’s memory is volatile and relies on power to retain stored information; powering down results in the loss of any saved data. With a scan rate of 145 cycles per second and a switch bandwidth of 35 MHz, the PXI-2520 stands out in relay performance and reliability for high-density switching applications.