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Digital I/O,

Digital I/O,
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Digital I/O, 24 or 96 Lines, 5 V TTL/CMOS 24 or 96-Line Digital I/O NI 650x • 24 or 96 digital input/output lines • 5 V TTL/CMOS • 2-wire handshaking capability • Known power-up states • NI-DAQ driver simplifies configuration and measurements Operating Systems Recommended Software • LabVIEW • LabWindows/CVI • Measurement Studio • Windows 2000/NT/XP • Real-time performance with LabVIEW (see page 134) • Others such as Linux and Mac OS X (see page 187) Other Compatible Software • Visual Basic • C/C++, C# Driver Software (included) • NI-DAQ 7 Device Type Software timed Logic Level 5 V TTL/CMOS Change Notification – Software timed supplied by the 8255; only one handshaking mode is available. Table 1. NI 650x Specifications Overview (See page 385 for detailed specifications.) NI 6503 devices are 24-bit parallel DIO interfaces for PCI, PCMCIA, and ISA. NI 6508 devices offer 96-bit parallel DIO interfaces for PCI, PXI, and ISA. All NI 650x devices are designed for 5 V TTL/CMOS I/O signals. Digital connectors for the NI 650x devices are described in Table 2. The eight bits in Port A of each PPI are at xPA7 through xPA0 on the digital I/O connector where x represents which PPI is being used. Ports B and C are at xPB7 through xPB0 and xPC7 through xPC0, respectively. Each port is programmed to be input or output. Power from the computer I/O channel is also available on the DIO connector. See page 381 to learn more about connectivity solutions, including direct connectors, electromechanical relay devices, and other signal conditioning solutions. Hardware 82C55 Parallel Port Interfaces NI 650x devices use 82C55 Parallel Port Interfaces (PPIs). NI 6503 devices contain one PPI, and the NI 6508 devices contain four. Each PPI controls 24 bits of DIO and has three 8-bit ports (A, B, and C). You can configure each port as either input or output. Ports A and B are always used for digital data I/O, while port C can be configured for digital data I/O, control, status, or handshake signals. Data Acquisition and Signal Conditioning Connector 50-pin, shown in Figure 3 27-pin; cable adapts it to the 50-pin connector shown in Figure 3 100 pin; shown in Figure 2 Table 2. NI 650x Connector Overview Digital I/O Power-Up State Selection You can power up the PCI-6503, PC-DIO-24, PC-DIO-96, and PXI-6508 DIO lines in a user-defined state – either high or low. On these devices, each line is connected to a 100 kΩ resistor, and you can use a jumper to select whether the lines of the device power up in the high or low state. The DAQCard-DIO-24 and PCI-DIO-96 have 100 kΩ resistors that always pull high. National Instruments • Tel: (800) 433-3488 • Fax: (512) 683-9300 • info@ni.com • ni.com

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Driver Software Address Bus Control Lines Data Bus I/O Channel Control Lines Interface Circuitry With NI-DAQ driver software, you can interactively configure your devices, write custom programs, and easily perform digital I/O. You can also use messaging so when an input port matches or mismatches a user-defined pattern, NI-DAQ can perform another Digital I/O, 24 or 96 Lines, 5 V TTL/CMOS Data Acquisition and Signal Conditioning Figure 1. NI 650x Hardware Block Diagram programmed operation. This process eliminates polling, decreases the load on the CPU and bus, and improves the efficiency of...

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Digital I/O Connectivity and Signal Conditioning Digital I/O Connectivity and Signal Conditioning Cables, Connector Blocks, and Signal Conditioning Choose your Digital I/O cables, connector blocks, and signal conditioning in two easy steps. Step 1. Choose your connector block and cable. (see digital I/O accessories section for details) Device PCI-6527, PXI-6527 Cables Kit includes R1005050 cable SH100-100-F R1005050 (splits into two 50-pin connectors); with this cable, you can use two accessories from this group with one NI 6527 device SH50-50 or NB1 PSH27-50F-D Kit includes R1005050 cable...

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Digital I/O Accessories and Cables Digital I/O Accessories and Cables Accessories for Digital I/O SCXI – High-Performance Modular Signal Conditioning (See Figure 1) Figure 1. SCXI High-Performance Signal Conditioning SCXI is a modular high-performance signal conditioning system that serves as a front end to your DIO device. The SCXI modules for DIO offer isolation, extended voltage ranges (up to 250 Vrms), increased current switching capabilities, and expanded channel counts (up to 3,072 I/O lines). In addition to SCXI modules for DIO, your SCXI signal conditioning system can include...

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Figure 6. CB-50LP I/O Connector Block Digital I/O Accessories and Cables CB-50LP I/O Connector Block (See Figure 6) RTSI Bus Cables Figure 7. B-100 I/O Connector Kit Figure 8. H50-50 Shielded Cable Data Acquisition and Signal Conditioning Figure 9. SH100-100-F Shielded Cable National Instruments • Tel: (800) 433-3488 • Fax: (512) 683-9300 • info@ni.com • ni.com

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Digital I/O Accessories and Cables ■=> ■ Ribbon cable that connects to a PCI-6527, PXI-6527, PCI-DIO-96, PXI-6508 and is re ^fl terminated with two 50-pin IDC connectors. ^ Figure 10. HW05050 Ribbon Cable 50-conductor ribbon cable that connects any device with a 50-pin connector to 50-pin 100-conductor ribbon cable that connects to a PC-DIO-96 device (100-pin connector) and is terminated with two 50-pin connectors. PCB Mounting Connectors for Custom Accessories (see Figure 13) PCB connectors for use in building custom accessories that connect to 100-conductor k shielded and ribbon cables....

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Digital I/O Overview Digital input/output (DIO) devices are used in a wide variety of applications from automotive design, industrial factory automation, and machine control, to aerospace, laboratory research, and biomedical applications. You can connect NI digital I/O devices to limit and proximity switches, photoelectric sensors, level gauges, pressure switches, gas detectors, pumps, motors, solid-state relays, electromechanical relays, digital data buses, and more. NI DIO devices can be installed in traditional desktop computers using the PCI or ISA bus, connected via USB port, or...

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