ACCES I/O announces PCIe-DIO-48S Digital I/O

October 22, 2009 - ACCES I/O Products announces Model PCIe-DIO-48S, a 48-channel PCI Express (PCIe) card designed for use in a variety of digital I/O applications. The digital I/O is compatible with 8255 PPI (mode 0), making it easy to program and migrate from other ACCES PCI digital I/O cards. The card features a x1 lane PCI Express connector which can be used in any x1 or higher PCI Express slot. The PCIe-DIO-48S is excellent for use in applications sensing inputs such as switch closures, TTL, LVTTL, CMOS logic and controlling external relays, driving indicator lights, and more.Each I/O line is buffered and capable of sourcing 32mA or sinking 64mA. Since the PCI Express x1 connector does not have sufficient power to drive this many channels, ACCES provides an on-board Molex PC-style connector compatible with system power supplies (for disk drive power), to externally provide maximum 5V current sourcing capability.Connections to the card are made via two industry standard, 50-pin headers. Each header has three 8-bit I/O ports designated A, B and C. Each port can be programmed as inputs or outputs. Change of State (COS) detection and interrupt capabilities are designed to relieve software from polling routines that can consume valuable processing time. Each port can be programmed for detecting state changes on their lines. An ISR (interrupt service routine) then reads the port to determine which bit changed state and clear the interrupt.Available accessories include a broad range of ribbon cables, screw terminal boards, optically isolated adapters, electromechanical relay boards, and industry standard solid state module racks.Key features of the PCIe-DIO-48S include: