Data Acquisition Output Modules Specifications

Device Specifications


	Analog Input Channels:		This is the maximum number of analog channel inputs. The single-ended number is specified when single-ended inputs are available as twice the number of differential inputs. Differential channels use the difference between two signals as an input; common mode is filtered out. In some systems, differential inputs are combinations of two single-ended inputs. When this is the case, twice the number of differential channels are available as single-ended inputs.
	Search Logic:		All matching products will have a value greater than or equal to the specified value.

	Differential Channels		Differential channels have two inputs. The signal to process is the voltage (V) difference between the two inputs. For example, if one reading is 4.93 V and the other reading is 5.16 V, the meaningful value is the 0.23 V difference between the two. Often, this applies to precision measurements where the difference between two low voltage inputs is small but critical.
	Search Logic:		"Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice.

	Digital I/O Channels:		Digital or discrete channels are used for low-level on-off signals used in applications such as communication, user interface, or control.
	Search Logic:		All matching products will have a value greater than or equal to the specified value.

	Resolution:		Resolution refers to the degree of fineness of the digital word representing the analog value. A ten-bit number contains 2¹⁰, or 1024, increments. A 0-10V signal could therefore be resolved into approximately 0.01V increments. A 12-bit representation would be in 2¹² (4096) increments, or divisions of 0.0024V for the same signal. Each additional bit doubles the resolution, and one bit is required for the polarity (sign) of a number.
	Search Logic:		All matching products will have a value greater than or equal to the specified value.

	Accuracy:		Accuracy depends on the signal conditioning linearity, hysteresis, temperature considerations, etc. It is represented here as percent full scale of measurement range.
	Search Logic:		All matching products will have a value less than or equal to the specified value.

Outputs


	Voltage Output?		Variable voltage output such as 0-10V, ±5V, etc.
	Search Logic:		"Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice.

	Current Output?		Variable current level output such as 0-20mA, 4-20 mA current loop, etc.
	Search Logic:		"Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice.

	Frequency Output?		Output is a frequency or pulse signal such as AM, FM, or PWM monitoring or control.
	Search Logic:		"Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice.

	Timer / Counter Output?		Output is a counting or timing of measured events.
	Search Logic:		"Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice.

	Relay Output?		Switch type output; contacts are open or closed depending on the state of one or more of the inputs.
	Search Logic:		"Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice.

	Resistance / Potentiometer Output?		Output is a variable resistance such as a potentiometer.
	Search Logic:		"Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice.

	Other Output?		Unlisted or specialized output.
	Search Logic:		"Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice.

User Interface


	User Interface
	Your choices are...
	None		No user input or programmability; "black box" style of storage for download or processing elsewhere.
	Front Panel & Display		Integral controls, keypad, and/or display on the panel of the unit.
	Touch Screen		The device's visual display screen is contact sensitive to allow direct input.
	Hand-held / Remote Programmer		Interface unit specifically meant to hold in hand while entering program parameters; may include remote programming.
	Computer Programmable		Device is interfaced to a separate supervisory or host computer.
	Other		Any unlisted user interface method.
	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.

Connection to Host


	Connection to Host
	Your choices are...
	Direct Backplane Interface		The circuit board installs directly into a computer motherboard or backplane.
	RS232		Interface between data terminal equipment and data communications equipment employing serial binary data interchange.
	RS422		RS422 is a balanced serial interface for the transmission of digital data. It was designed for greater distances and higher Baud rates than RS232.
	RS485		RS485 is a balanced serial interface for the transmission of digital data. The advantage of a balanced signal is the greater immunity to noise. The difference between RS422 and RS485 is that RS485 can be transformed into a multi-point application.
	USB		Universal Serial Bus. The standard serial bus for low-to-medium speed peripheral device connections to Personal Computers, including keyboards, mice, modems, printers, joysticks, audio functions, monitor controls, etc.
	IEEE 1394 (Firewire®)		A companion to USB, IEEE 1394 is a very high-speed serial bus (400 Megabit - 1 Gigabit). It was designed to replace all external high-speed peripheral connections to personal computers, including hard disks, CD-ROM's, DVD's, graphics cards, high-speed scanners, direct video, monitors, etc.
	GPIB (IEEE 488, HPIB)		GPIB (General Purpose Interface Bus) is designed to connect computers, peripherals and laboratory instruments so that data and control information can pass between them. It is also known as IEEE 488 or HPIB, and is electrically equivalent to IEC 625 bus.
	SCSI		SCSI (Small Computer System Interface) is a parallel interface standard used by Apple Macintosh computers, PCs, and many UNIX systems for attaching peripheral devices to computers.
	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		A local-area network (LAN) protocol developed by Xerox Corporation in cooperation with DEC and Intel in 1976. Ethernet uses a bus or star topology and supports data transfer rates of 10 Mbps. The Ethernet specification served as the basis for the IEEE 802.3 standard, which specifies the physical and lower software layers. Ethernet uses the CSMA/CD access method to handle simultaneous demands. It is one of the most widely implemented LAN standards.
	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.

	Transmission Rate:		Transmission speed in bits per second.
	Search Logic:		All matching products will have a value greater than or equal to the specified value.

	Web Enabled?		Device contains hardware and software protocols such as Hypertext Transfer Protocol (http) or Web Access Protocol (WAP) for being addressable to, or a node of, the World Wide Web for remote monitoring or communication.
	Search Logic:		"Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice.

Network Specifications


	Networkable System?		Device is designed to communicate with or be a node of a digital network.
	Search Logic:		"Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice.

	Network Options:
	Your choices are...
	Ethernet		A standard method of connecting computers to a local area network (LAN) using coaxial cable.
	CANbus		CANbus is a high-speed serial data network engineered to exist in harsh electrical environments.
	DeviceNet		DeviceNet is a network designed to connect industrial devices such as limit switches, photoelectric cells, valve manifolds, motor starters, drives, and operator displays to PLCs and PCs. The network eliminates hard wiring while providing device-level diagnostics.
	SDS		Smart Distributed System (SDS) is an advanced bus system for intelligent sensors and actuators using CAN-based technology.
	Foundation Fieldbus		A bi-directional communications protocol used for communications among field instrumentation and control systems.
	Profibus		PROFIBUS is a vendor-independent, open field bus standard used in a wide variety of manufacturing and process automation applications.
	SERCOS		(SErial Real-time COmmunications System) is an open controller-to-intelligent digital drive interface specification, designed for high-speed serial communication of standardized closed-loop data in real-time over a noise-immune, fiber-optic cable.
	IEEE P1451		A standard designed to produce network-capable, network-independent smart sensors. With the standard, all transducers are identical, regardless of the target network or fieldbus.
	Beckhoff I/O		A communications system that couples open fieldbus protocols to Beckhoff's Bus Terminal I/O. This allows connectivity to a large variety of devices on the Bus Terminal (K-bus).
	IEEE 1394 (Firewire®)		The IEEE 1394 standard is a scalable, flexible, digital interface designed by Apple Computer, Inc., to integrate the worlds of consumer electronics and personal computers. The IEEE 1394 standard defines both a back plane physical layer and a point-to-point cable-connected virtual bus implementations. FireWire, Apple's implementation of IEEE 1394, is a fast peripheral standard for use with multimedia peripherals such as video camcorders and other high-speed devices like the latest hard disk drives and printers.
	Other		Any unlisted network system; may include proprietary networks.
	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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