Model DIO48S/AT-P 48 Channel Digital Hardware Interrupt Generator Card FEATURES � 48 Channels of Digital I/O � Interrupt Generation on Input Change of State � Change-Of-State Interrupt Software Enabled in Six 8-Input Ports � All 48 I/O Line Buffered � Four and Eight Bit Ports � Hysteresis and Pull-Ups on I/O Lines � Compatible with Industry Standard I/O Racks DESCRIPTION The DIO48S/AT-P provides 48 lines of digital I/O change, a latched interrupt request can be generated. in two independent 24-bit groups. Each 24-bit group uses Thus, you can detect input state changes without the need a Programmable Peripheral Interface chip type 8255-5. for software to continuously poll the inputs. After the interrupt has been serviced, the interrupt latch can be Each PPI provides three 8-bit ports (A, B, and C) which cleared by software control. Interrupts are OR�ed can be independently configured for either input or output. Port C can also be configured in four-bit groups together and may be directed to an �AT� interrupt level for input or output. Type 74LS245 tri-state transceivers by jumper selection. provide hysteresis correction for inputs and added drive Two 50-wire ribbon interface cables plug into headers capability for inputs. The direction of these buffers is on the card and exit through a slot in the back-plate. The automatically set as input or output according to software connectors are compatible with our PB Series isolation command. The 8255 PPIs only function in Mode 0. relay racks as well as relay racks from other sources A major feature of this card is that the state of all such as Gordos, Burr Brown, Grayhill and OPTO 22. inputs can be monitored and, if any one or more bits SPECIFICATIONS Power Output Digital Inputs Tri State Buffered: 74LS245 +5 VDC from computer bus (external 1A fast-blow fuse recommended). Logic High:2.0 to 5.0 VDC Power Required Logic Low: -0.5 to +0.8 VDC +5 VDC @ 300 mA typical Input Load (Hi): 20 �A Size Input Load (Lo): -200 �A 7.15 in (181.6 mm) long Digital Outputs Temperature Logic High:2.5 VDC Min, Operating: 0 to 60�C Source 15 mA Logic Low: 0.5 VDC max, Storage: -50 to +120�C Sink 24 mA 1 Document 1125, 8/26/97 SPECIFICATIONS CONT. Model DIO48S/AT-P Relative Humidity3,1&211(&7256 0 to 90% non-condensing 3& 3&Connector3RUW&+L 3& 3&50-pin IDC Header/ 24 I/O lines 3& 3&3RUW&/RAddress Requirements 3& 3& 16 bytes3% 3% Interrupts3% 3%3RUW% 3%3 thru 7, 10 thru 12, 14 & 15 3% 3% 3% 3$ 3$ 3$ 3$3RUW$ 3$ 3$ 3$ 3$ 9’& ,2/LQHDQGDQ,17(QDEOH ,2/LQHDQG8VHU,QWHUUXSW SOFTWARE A disk is provided that includes a graphical Set- Languages Supported up program, and a routine titled FINDBASE that Visual BASIC V3.0 (16-bit DLL) helps select an I/O base address that will not Visual BASIC V4.0 (32-bit DLL) conflict with other resources already installed in Turbo C V2.0 the computer. Another software feature included Borland C++ V3.1 or higher is Windows DLLs that are designed to work with Demo/Example Programs Included any Windows language that allows calls to DLLs. These DLLs support Windows 3.1x, Windows 95 Examples in C are provided. A Windows sample and Windows NT. is also provided. Operating Systems Supported Drivers Provided DOS 3.3 and higher Software drivers are not provided because direct Windows 3.1x register I/O is the fastest way to communicate and Windows 95 can be used with ease. Most high-level languages Windows NT provide means for output statements and the user manual contains complete details about register assignments. ORDERING GUIDE Model 50IDC Model DIO48S/AT-P IDC Header connector Board, manual, software Model CAB50-6 Model 2M50FC 6 ft (1.83 m) cable to connect to PB24 Isolation Screw terminal board for field wiring Relay Rack Model 2TK2D-6 Model CAB50A-6 6" section of SNAPTRACK Cable to connect to UTB-K Screw Terminal Panel or to 2M50FC Model TKAD Model UTB DIN kit mounting clips for SNAPTRACK (2 required) Terminal Panel Model UTB-K Termination panel w/ metal enclosure