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a3821046
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1992-05-16
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5
EISA HP-IB* Adapter Technical Data
For HP Apollo 9000 Series 700 Computer Systems Product Number 25560A
The HP 25560A EISA HP-IB* host adapter allows customers to connect
supported HP-IB devices to HP Apollo 9000 Series 700 systems**.
Features
The HP 25560A
o Has a maximum burst transfer rate of 1 Mbyte/second in high-speed
mode, and 500 Kbytes/second in standard-speed mode
o Complies with IEEE-488-1978 and IEEE-488A-1980 standards
o Supports cabling distances of up to 15 meters for high-speed operation
and up to 20 meters for standard-speed operation
o Supports up to 14 standard-speed devices or 7 high-speed devices
o Has software-configurable HP-IP parameters, which include operating
speed, HP-IB bus address, and HP-IB system controller capability
o Allows simple implementation of computer-controlled instrumentation
and peripheral systems
[Figure 1 (EISA HP-IB Adapter) Caption: none]
o Has selectable HP-IB controller or slave capabilities
o Has parallel poll mode which can be programmatically enabled or
disabled
o Uses self-test to help assure interface integrity
* The Hewlett-Packard Interface Bus (HP-IB) is HP's implementation of
IEEE Standard 488-1978: "Digital Interface for programmable
instrumentation" and identical ANSI Standard MS 1.1. The term "HP-IB"
is also used to identify Hewlett-Packard instruments conforming with
this standard.
**Refer to the HP Apollo 9000 Series 700 Configuration Guide for a
current list of supported peripherals and configuration limitations.
HP-IB Capabilities
The HP 25560A EISA HP-IB host adapter connects to the signal lines shown
in Figure 1, acting as DEVICE A. Eight bidirectional data bus lines
carry coded messages in bit-parallel, byte-serial form to/from other
devices on the bus, with each byte transferred from one "talker" to one
or more "listeners." Data is exchanged asynchronously using interface
messages to set up, maintain, and terminate an orderly flow of
device-dependent messages. Three handshake control lines control the
transfer of each byte of coded data on the eight data lines. The five
general interface management lines ensure an orderly flow of information
within the HP-IB. (For more details on the HP-IB characteristics of the
HP 25560A adapter, refer to the HP-IB tutorial, P/N 5952-0156.)
Functional Specifications
Capacity
Up to seven high-speed devices per HP 25560A adapter.
Up to 14 standard-speed devices per HP 25560A adapter.
Operating Modes
High-Speed Mode: The adapter operates at data rates to 1 Mbyte/s
Standard-Speed Mode: The adapter operates at data rates to 500 Kbytes/s
6
Note: Attainable speed for a particular system depends on such factors
as cabling length, type of external device, system level software, and
number of devices.
System Controller Mode: A software selection enables or disables the
operation of the HP 25560A as system controller.
Bus Characteristics
HP-IB Signal Lines:
The HP 25560A conforms to IEEE 488-1978 and IEEE-488A-1980 standards.
(For more details on the HP-IB characteristics of the HP 25560A adapter,
refer to the HP-IB tutorial, P/N 5952-0156.)
Supported HP-IB Functions: C1-C5, SR1, RL2, PP1, DC1, SH1, AH1, T1,
TE1, L1, LE1, DT1, and E2. TE1 and LE1 require host system support.
Maximum Cable Length for Standard Operation: The maximum cable length
in meters should be equal to two times the number of device loads on the
HP-IB or 20 meters, whichever is less.
Note: Device loads consist of peripheral devices, the host adapter, and
equivalent loads in resistor packs. Only the HP-IB system controller may
contain additional device loads (resistor packs).
Maximum Cable Length for High-Speed Operation: The maximum cable length
in meters should be equal to the number of device loads on the HP-IB or
15 meters, whichever is less. There must be at least one device load per
meter of cable. (The resistor pack that comes installed on the HP 25560A
adds seven equivalent device loads. The HP 25560A HP-IB adapter counts
as one device load).
The number of HP-IB device loads must not exceed 15. A maximum system
would be composed of a System Controller, with its resistor pack, and
seven peripherals (CRC-16).
Error Detection
Data errors can be detected using Cyclic Redundancy Check-16 (CRC-16) on
all data messages sent or received. CRC-16 can be used if the other
participating device supports CRC-16. CRC-16 is invoked by the system
for each transaction. See system documentation for details. Interface
message errors are detected using odd byte parity.
Electrical Specifications
Voltage: +5 volts
Current: 3.06 amps
Power Dissipation: 15.3 watts
Physical Characteristics
Size: 21.3 cm long by 11.4 cm wide by 1.5 cm high (8.4 in by 4.5 in by
0.6 in)
Weight: 173 g (6.1 oz) without HP-IB cable
Environmental Characteristics
Operating Temperature:
7
0 degreesC to 55 degreesC (32 degreesF to 131 degreesF)
Non-Operating Temperature:
-40 degreesC to 70 degreesC (-40 degreesF to 158 degreesF)
Relative Humidity:
15% to 95% at 40 degreesC (104 degreesF) noncondensing
Ordering Information
The HP 25560A EISA HP-IB adapter is supported on HP Apollo 9000
Series 700 systems using HP-UX 8.05 or later.
The HP 25560A includes:
25560-60001 EISA HP-IB adapter card assembly
5957-4369 antistatic precautions note
25560-90001 EISA HP-IB adapter installation manual
Note: The HP 25560A does not include an HP-IB cable. Cables must be
ordered separately through HP Complementary Products Sunnyvale (CPS).
The HP 25560A EISA HP-IB adapter can be ordered:
- As an add-on product to HP Apollo 9000 Series 700 systems
- As an option to HP Apollo 9000 Series 700 computers
When ordered as an option with a Series 700 system, the HP 25560A is
installed and configured into the Series 700 system. Refer to the
HP Apollo 9000 Series 700 Price Guide or Configuration Guide for
more detailed ordering information.
From HP Networking Communications Specification Guide,
5091-3821E, 9205, p 046
Associated files: la382146.plt, la382146.gal, la382146.doc
EISA HP-IB* Adapter Technical Data