GPIB-IEEE488

IEEE-488
Pin out

Female IEEE-488 connector
Pin 1	DIO1	Data input/output bit.
Pin 2	DIO2	Data input/output bit.
Pin 3	DIO3	Data input/output bit.
Pin 4	DIO4	Data input/output bit.
Pin 5	EOI	End-or-identify.
Pin 6	DAV	Data valid.
Pin 7	NRFD	Not ready for data.
Pin 8	NDAC	Not data accepted.
Pin 9	IFC	Interface clear.
Pin 10	SRQ	Service request.
Pin 11	ATN	Attention.
Pin 12	SHIELD
Pin 13	DIO5	Data input/output bit.
Pin 14	DIO6	Data input/output bit.
Pin 15	DIO7	Data input/output bit.
Pin 16	DIO8	Data input/output bit.
Pin 17	REN	Remote enable.
Pin 18	GND	(wire twisted with DAV)
Pin 19	GND	(wire twisted with NRFD)
Pin 20	GND	(wire twisted with NDAC)
Pin 21	GND	(wire twisted with IFC)
Pin 22	GND	(wire twisted with SRQ)
Pin 23	GND	(wire twisted with ATN)
Pin 24	Logic ground

Advantages

Simple hardware interface
Ease of connecting multiple device to a single host
Allows mixing of slow and fast devices
Well-established and mature, widely supported
Rugged connectors, held in place by screws, means cables can't easily be accidentally removed as they can with Firewire and USB

[edit]Disadvantages

Mechanically bulky connectors and cables
Limited speed and expansion
Lack of command protocol standards (before SCPI)
Implementation options (e.g. end of transmission handling) can complicate interoperability in pre-IEEE-488.2 devices
No mandatory galvanic isolation between bus and devices
High cost (compared to RS-232/USB/Firewire/Ethernet)
Limited availability (again compared to RS-232/USB/Firewire/Ethernet)

Comments

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