The National Instruments PXI-2521 PXI Relay Module (Part Number: 778572-21) is designed for demanding industrial applications, featuring 40 independent Double-Pole, Single-Throw (DPST) relays capable of switching 2 A at a maximum voltage of 150 V. This module is fully software programmable and is equipped with advanced features to handle over-temperature conditions that arise from excessive power dissipation, particularly when switching large impulses from capacitive or inductive loads. The embedded NI Switch Health Center application, installed with the NI-SWITCH driver, facilitates real-time monitoring of relay health, guiding users in relay replacement and creating detailed user reports. This software verifies the operational state of each relay by sending signals across multiple channels and alerts users to any relays that may be stuck open or closed. Additionally, it conducts resistance tests to track significant changes in contact resistance over time, indicating when a relay may be nearing the end of its operational life. The PXI-2521 features a switch bandwidth of 25 MHz, supports a maximum scan rate of 145 cycles per second, and has compact dimensions of 8.5 x 0.8 x 5.1 inches with a weight of 6.4 ounces. For further information regarding its specifications or to access the user manual, please visit the ApexWaves.com website or contact a sales representative for pricing details. This module is backed by a warranty ranging from two to three years.