The National Instruments PCI-6527 (Part Number: 777810-01) is a parallel isolated digital I/O device designed for compact PCI chassis, PXI, or PCI bus computers. This 48-bit device features 48 channels, comprising 24 solid-state relay outputs and 24 optocoupled input channels, enabling the acquisition of isolated digital data. Each input channel includes two differential isolated terminals—one for the signal and the other for the reference—allowing for an input voltage range that registers as a logic high between 2 to 28 VDC and a logic low between 0 and 1 VDC. The PCI-6527 effectively senses digital levels up to 28 VDC and can switch currents up to a maximum of 120 mA. To enhance reliability, the device incorporates digital filtering to eliminate glitches on input lines, and all input lines can generate interrupts on rising or falling edges, alerting users to data changes. This jumperless DAQ device utilizes the proprietary National Instruments PCI MITE interface and is well-suited for low voltage switching and isolation in both laboratory and industrial applications. The PCI-6527 is equipped with a 100-pin female I/O connector and has dimensions of 6.9 x 4.2 inches. It can read external digital logic at both TTL and non-TTL levels due to its optically-isolated digital lines. The solid-state relay outputs can control external devices while decoupling the system from noisy ground conditions. The device operates with NI-DAQ driver software and supports multiple application development environments including LabVIEW, Measurement Studio, Visual C++, LabWindows/CVI, and Visual Basic, with particular emphasis on LabVIEW and Measurement Studio to streamline development efforts. The PCI-6527 is backed by a three-year warranty, and users can access the manual and maintenance documentation for detailed guidance. For pricing information, please contact a National Instruments sales representative.