The National Instruments PXI-2566 Relay Module (Part Numbers: 778572-66, 778573-66) is a robust 2 A, 16-channel PXI relay module tailored for general-purpose applications. It utilizes single-pole double-throw (SPDT) Form C armature relays, which are non-latching and characterized by low thermal offsets and minimal on-resistance. This module is designed for the effective controlling, routing, and switching of high-current signals, featuring each relay channel equipped with a normally open (NO), normally closed (NC), and common (COM) terminal. The PXI-2566 boasts a switch bandwidth of 70 MHz, with the 778573-66 variant rated for 60V operation. Users can configure the module for either 16 SPDT or 8 DPDT topology.

In terms of input specifications, the PXI-2566 supports a maximum switching voltage of 150 V DC and 125 V AC (channel-to-channel), with an isolated channel-to-ground rating of 150 V DC and 125 V AC, meeting Measurement Category I standards and safeguarding signal voltages up to 150 V. The module includes integrated protection, capable of withstanding impulse voltages up to 800 V. It offers a maximum switching power of 60 W and 62.5 VA (DC to 60 Hz), with a maximum switching current of 2 A for both DC and AC operations. The relays feature a typical operate time of 2 ms and a maximum cycle speed of 115 cycles per second, thereby facilitating the parallel operation of all 16 channels at peak current.

Physically, the PXI-2566 is a 3U, single-slot PXI module, measuring 8.5 x 0.8 x 5.1 inches and weighing approximately 250 g (9 oz). It includes a male 62-pin D-SUB I/O connector and requires a power consumption of 4.5 watts at 5 V and 2.5 watts at 3.3 V. Operating within a temperature range of 0 °C to 55 °C and a storage range of -20 °C to 70 °C, it maintains functionality across a non-condensing humidity range of 5% to 85%. The PXI-2566 is designed to withstand operating and non-operating random vibrations of 0.3 grms and 2.4 grms, respectively, across a frequency range of 5 Hz to 500 Hz. For detailed guidance, a user manual and maintenance manual can be downloaded, and pricing is available upon request from a sales representative.