Data Acquisition I/O Modules Specifications

Computer Bus


	Computer Bus
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	CompactPCI		Compact PCI (cPCI) is a high-performance industrial bus that uses the electrical standards of the PCI bus and is packaged in a Eurocard. Specifications for the CompactPCI bus are developed and maintained by the PCI Industrial Computers Manufacturers Group (PICMG). cPCI buses are used extensively in systems that require high speed data transfers. Examples include data communication routers and switches, real-time machine control, real-time data acquisition, military systems, etc.
	MCA		The MCA bus, which was designed to replace the ISA bus, uses IBM's microchannel architecture (MCA). It is capable of plug-and-play because adding a card to a microchannel computer does not change the interrupt and DMA settings on the card. The MCA bus was used almost exclusively with IBM's PS/2 product line, but is now discontinued.
	IEEE 1394 (Firewire®)		IEEE 1394 or FireWire® is an interface standard adopted by the Institute of Electrical and Electronics Engineers (IEEE) for very fast digital data transfers such as streaming video. IEEE 1394 connectors are used to transmit and receive data among FireWire devices, and are designed to replace external high-speed peripheral connections to personal computers, including hard disks, CD-ROMs, DVDs, graphics cards, high-speed scanners, direct video, monitors, etc. Tiny, robust FireWire connectors will also become important parts of home entertainment, communication, and appliance networks. FireWire is a registered trademark of Apple Computer, Inc.
	Industry Pack® Bus (IP)		IndustryPack^® (IP) is a mezzanine bus that provides input / output (I/O) capabilities in general-purpose computer systems. IndustryPack is both a registered trademark of GreenSpring computers and a specification maintained by the VITA standards organization (VSO) of the American National Standards Institute (ANSI). IP modules are available in two sizes. Single-size modules are 1.8” x 3.9” (45.3 cm²). Double-size modules are 3.6” x 3.9” (90.6 cm²).
	ISA / EISA		Industry standard architecture (ISA) buses can handle 16-bit data transfers at a clock speed of 8 MHz. They are also capable of handling memory under 16 MB. Extended ISA (EISA) is an enhanced version of the ISA bus. EISA buses run at 8 MHz, are capable of 32-bit data transfers, and can access all memory in the system.
	Nubus (Mac PCI)		NuBus was the expansion bus for versions of the Macintosh^®computer starting with the Macintosh II and ending with the Performa. Macintosh is a registered trademark of Apple Computers. Current Macintosh computers use the PCI bus (Mac PCI).
	MIX Bus		Modular interface extension (MIX) is a high-performance stacking and communications interface for connecting expansion modules to a VMEbus baseboard. The MIX bus supports 32-bit data transfers and DMA transfers. It also provides 4 GB of memory addressing capability.
	Multibus (I & II)		Multibus is a modular computer-systems architecture used in embedded applications in telecommunications, medical-devices, manufacturing automation, networking, and other market areas.
	*PC/104 (PC/104-Plus, EBX)*		PC/104 gets its name from the desktop personal computers designed by IBM (PCs), and from the number of pins used to connect the cards together (104). PC/104 cards are much smaller than ISA-bus cards and stack together eliminating the need for a motherboard, back plane, and/or card cage. PC/104-Plus incorporates the PCI bus into the PC/104 form-factor for faster data transfer. EBX (Embedded Board eXpandable) defines a 5.75" x 8" form factor large enough to implement a powerful single-board computer. It supports PC/104 expansion.
	PCI		Peripheral component interconnect (PCI) is a local bus system designed for high-end computer systems. PCI buses transfer 32 or 64 bits of data at a clock speed of 33 MHz. They also support 3 to 5 critical peripherals, which are either integrated directly onto the motherboard or added via expansion cards. PCI buses fully support cards that were developed for standard I/O buses.
	PCMCIA (PC Card)		PCMCIA devices (PC Cards) are credit-card-sized peripherals predominantly used in laptop computers. The PCMCIA adapter takes the place of a COM port on a standard bus. The card is plugged into a 68-pin host socket that is connected either to the motherboard or an expansion bus. An adapter then translates the PCMCIA signals into signals usable by the computer's bus.
	PXI Bus		PCI extensions for instrumentation (PXI) is a superset of CompactPCI that adds timing and triggering functions, imposes requirements for documenting environmental tests, and establishes a standard Windows^®-based software framework. Windows is a registered trademark of the Microsoft Corporation.
	PMC Bus		PMC is a form factor, not a bus. It is electrically equivalent to the PCI bus, but has a different shape and bus connectors. PMC is designed for rugged applications and provides a secure mounting platform for VME mezzanine boards.
	STD Bus		STD is often called the "blue collar bus" because of its rugged design and use in industrial and process control applications. There are three STD bus types: STD Z80, STD80, and STD 32. The STD Z80 bus and the STD 80 bus use a 56-pin backplane with 0.125" contact spacing for card interconnection. The STD 32 Bus provides a 32-bit wide data bus to support 8, 16, and 32-bit data transfers. Dynamic bus sizing, which varies the data path size depending on the requirements of the peripheral card being addressed, gives the STD 32 bus added flexibility.
	Sbus		SBus was developed by Sun Microsystems for use with SPARC^®-based computers. SPARC, an acronym for scalable processor architecture, and is a registered trademark of SPARC International, Inc. Though standardized as IEEE 1496, the SBus is no longer used. It has been replaced by peripheral component interconnect (PCI).
	USB		Universal serial bus (USB) is a 4-wire, 12-Mbps serial bus for low-to-medium speed peripheral device connections to personal computers (PC), including keyboards, mice, modems, printers, joysticks, audio functions, monitor controls, etc. The USB design is standardized by the USB Implementers Forum (USBIF), an organization that includes leading companies from the computer and electronics industries. The current USB specification is USB 2.0, which supports data transfer rates of up to 480 Mbps.
	VMEbus		VMEbus is based on the VME standard, which defines mechanical specifications such as board dimensions, connector specifications and enclosure characteristics, as well as the electronic specifications for sub-bus structures, signal functions, timing, signal voltage levels, and master/slave configurations. The VMEbus uses 3U and 6U Eurocards, rugged circuit boards that provide a 96-pin plug instead of an edge connector for durability. Several VMEbus varieties are available.
	VXI / MXI Bus		VME extensions for instrumentation (VXI) is an electrical and mechanical standard used mainly with automatic test equipment (ATE). VXI allows equipment from different vendors to work together in a common control and packaging environment. Multisystem extension interface (MXI) is an 8MB/s bus for connection of up to 8 digital devices and expansion boards.
	Other		Unlisted, specialized, or proprietary configuration.
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Connection to Host


	Connection to Host
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	Direct Backplane Interface		The circuit board installs directly into a computer motherboard or backplane.
	RS232/422/485		RS232/422/485 is an interface between data terminal equipment and data communications equipment employing serial binary data interchange.
	USB		Universal serial bus (USB) is a 4-wire, 12-Mbps serial bus for low-to-medium speed peripheral device connections to personal computers (PC), including keyboards, mice, modems, printers, joysticks, audio functions, monitor controls, etc. The USB design is standardized by the USB Implementers Forum (USBIF), an organization that includes leading companies from the computer and electronics industries. The current USB specification is USB 2.0, which supports data transfer rates of up to 480 Mbps.
	IEEE 1394 (Firewire®)		IEEE 1394 or FireWire® is an interface standard adopted by the Institute of Electrical and Electronics Engineers (IEEE) for very fast digital data transfers such as streaming video. IEEE 1394 connectors are used to transmit and receive data among FireWire devices, and are designed to replace external high-speed peripheral connections to personal computers, including hard disks, CD-ROMs, DVDs, graphics cards, high-speed scanners, direct video, monitors, etc. Tiny, robust FireWire connectors will also become important parts of home entertainment, communication, and appliance networks. FireWire is a registered trademark of Apple Computer, Inc.
	GPIB		The general-purpose interface bus (GPIB) is designed to connect computers, peripherals and laboratory instruments so that data and control information can pass between them. It was originally developed by Hewlett Packard (HP) and called the HPIB bus. GPIB is also know as the IEEE 488 bus, and is electrically equivalent to the IEC 625 bus.
	SCSI		Small computer systems interface (SCSI) is an intelligent I/O parallel peripheral bus with a standard, device-independent protocol that allows many peripheral devices to be connected to the SCSI port. A single SCSI bus can drive up to eight devices or units: the host adapter or controller, and seven other devices. Each device is assigned a different SCSI ID, ranging from 0 to 7. SCSI formats include SCSI-1, SCSI-2, SCSI-3, Wide SCSI, Fast SCSI, Wide Fast SCSI, Ultra SCSI, Ultra2 SCSI, Ultra3 SCI (Ultra160), Ultra 320 SCSI, and Ultra640 SCSI.
	TTL		Transistor-transistor logic, a common type of digital circuit in which the output is derived from two transistors. More commonly, however, TTL is used to designate any type of digital input or device.
	Parallel Interface		A channel capable of transferring more than one bit simultaneously; parallel communication protocols include GPIB / IEEE-488 / HPIB Protocol.
	Ethernet		Ethernet is a local area network (LAN) protocol that uses a bus or star typology and supports data transfer rates of 10 Mbps. The Ethernet specification is the basis for the IEEE 802.3 standard, which specifies the physical and lower software layers. To handle simultaneous demands, Ethernet uses carrier sense multiple access / collision detection (CSMA/CD) to monitor network traffic.
	Modem		Modulator-demodulator. A modem is a device or program that enables a computer to transmit data over telephone lines. Computer information is stored digitally, whereas information transmitted over telephone lines is transmitted in the form of analog waves. A modem converts between these two forms.
	Radio / Telemetry		Communication from data acquisition device to host or storage unit via radio transmission.
	Other		Unlisted, specialized, or proprietary communication configuration.
	Search Logic:		All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches.

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