What is an IEEE 488 standard bus?
Also known as GPIB (General Purpose Interface Bus), IEEE-488 is the international standard for a parallel interface used for attaching sensors and programmable instruments to a computer.
Which type of system is used in IEEE 488 system?
IEEE 488 is an 8-bit, electrically parallel bus which employs sixteen signal lines — eight used for bi-directional data transfer, three for handshake, and five for bus management — plus eight ground return lines.
What IEEE 448?
IEEE 488 is a digital communications bus specification invented by Hewlett Packard and used to connect short range communication devices. This term is also known as the general purpose interface bus (GPIB) or the Hewlett Packard interface bus (HP-IB).
When was GPIB invented?
1974
The GPIB bus was invented by Hewlett-Packard Corporation in 1974 to simplify the interconnection of test instruments with computers. At that time, computers were bulky devices and did not have standard interface ports.
Why is GPIB still used?
As a general rule, GPIB is still widely used for automated test systems that need a variety of instruments. GPIB is still popular among test engineers in the aerospace and military industries because their products have long life cycles; 20 years is not uncommon.
How many devices can be connected in a single IEEE-488 bus?
15 devices
Interconnection Cabling Any individual IEEE-488 bus is limited to 15 devices including the controller.
What does GPIB stand for?
General Purpose Interface Bus
What is GPIB? GPIB (General Purpose Interface Bus) was developed as an interface between computers and measuring instruments. It is mainly used to connect PCs and measuring instruments.
Is GPIB obsolete?
➨The GPIB interface is used for low speed data communication unlike modern interfaces which are used for high speed communication. ➨Modern instruments have slowly stopped its usage. It will become obsolete in few years.
What is Hart protocol used for?
HART (Highway Addressable Remote Transducer) Protocol is an open standard used globally to send and receive digital information using analog wiring between smart devices and control systems. With over 30 million devices installed, it is the most popular protocol used in the field.
Is HART protocol still used?
HART is widely used in process and instrumentation systems ranging from small automation applications up to highly sophisticated industrial applications….Highway Addressable Remote Transducer Protocol.
| HART | |
|---|---|
| Protocol Information | |
| Maximum Speed | Depends on physical layer employed |
| Device Addressing | Hardware/software |
| Governing Body | FieldComm Group |
Why do we use 4-20 mA and not 0 20ma?
The 4 mA is used as “range zero”. If the range zero were truly zero mA, then there would be no current, and therefore no power to drive the field instrument. Field instrument would require 3 or 4 wire devices. Additional wiring costs come into account.
What are the 2 frame formats in HART?
There are two main operational modes of HART instruments: point-to-point (analog/digital) mode, and multi-drop mode.
What are the characteristics of an IEEE 488 bus?
Characteristics. IEEE 488 is an 8-bit, electrically parallel bus. The bus employs sixteen signal lines — eight used for bi-directional data transfer, three for handshake, and five for bus management — plus eight ground return lines. Every device on the bus has a unique 5-bit primary address, in the range from 0 to 30…
What is the IEEE 488 stacking connector specification?
IEEE 488 stacking connectors IEEE 488 is a short-range digital communications 8-bit parallel multi-master interface bus specification developed by Hewlett-Packard as HP-IB (Hewlett-Packard Interface Bus). It subsequently became the subject of several standards, and is generically known as GPIB (General Purpose Interface Bus).
What was the maximum data rate for IEEE 488.1?
National Instruments introduced a backward-compatible extension to IEEE 488.1, originally known as HS-488. It increased the maximum data rate to 8 Mbyte/s, although the rate decreases as more devices are connected to the bus.
Is there an IEEE 488 port for a spectrum analyzer?
IEEE-488 port with listed capabilities on a spectrum analyzer. More information see Tektronix. HP’s designers did not specifically plan for IEEE 488 to be a peripheral interface for general-purpose computers; the focus was on instrumentation.
