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Power Tools 1993 October - Disc 1
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a3821248
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1992-05-09
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HP-IB* Interface for HP 3000 Series 900 Computer Systems, Technical
Data
For HP 3000 Series 900 Computer Systems Product Number 27113A
The HP 27113A HP-IB* Interface allows connection of up to 14
HP-IB-compatible devices to HP 3000 Series 900 systems that use the
Channel I/O (CIO) backplane. HP-IB compatible devices include flexible
and hard disks, printers, plotters, magnetic tape devices, graphics
digitizers, and an extensive list of instruments.
Features
o 980 Kbytes/s high-speed, 500 Kbytes/s standard-speed
o Fully IEEE-488-1978 compatible
o Onboard intelligence off-loads the host computer, leaving more CPU
resources for application-oriented tasks
o Support of up to 14 standard devices, 8 high-speed devices
* 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 MC 1.1. The term "HP-IB"
is also used to identify Hewlett-Packard instruments conforming with
this standard.
** Standard-speed devices cannot be mixed on a high-speed bus.
High-speed devices can be mixed on a standard-speed bus if high-speed
cabling rules are observed.
o Support of Command Set 80 protocol for CS/80-based disks and tapes
o Parity check and Cyclic Redundancy Check-16 for error detection
o Simple implementation of computer-controlled instrumentation and
peripheral systems
o Selectable HP-IB controller or slave capabilities
o Programmatically-enabled or -disabled parallel poll mode
o Firmware-based self-test to help ensure interface integrity
[Figure 1 (HP-IB* Interface for HP 3000 Series 900 Computer Systems
diagram) Caption: none]
HP-IB Capabilities
The HP 27113A HP-IB Interface 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 setup, 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.
Functional Specifications
Capacity
High-speed Devices per HP 27110B Interface: Up to 8 with load
resistors installed. Up to 14 without
Standard-speed HP-IB devices per interface: Up to 14
Operating Modes
High-speed Mode: Operation at data rates to 980 Kbytes/s
Standard-speed Mode: Operation at data rates to 500 Kbytes/s
Note: Attainable speed for a particular system is dependent on such
factors as cabling length, type of external device, system level
software, and number of devices. Higher transfer rates can be achieved
when using less than maximum cable lengths and devices. Consult system
documentation for further information or the HP-IB tutorial,
P/N 5952-0156.
System Controller Mode: A two-position switch enables HP 27113A
operation as system controller or disables such operation.
Bus Characteristics
HP-IB Signal Lines:
DIO1 Data Input/Output 1
DIO2 Data Input/Output 2
DIO3 Data Input/Output 3
DIO4 Data Input/Output 4
DIO5 Data Input/Output 5
DIO6 Data Input/Output 6
DIO7 Data Input/Output 7
DIO8 Data Input/Output 8
DAV Data Valid
NRFD Not Ready for Data
NDAC Not Data Accepted
IFC Interface Clear
ATN Attention
SRQ Service Request
REN Remote Enable
EOI End or Identify
Logic Levels: High >2.4 V; Low <0.5 V; all signals are low true
Supported HP-IB Functions: C1-C5, SR1, RL2, PP1, DC1, SH1, AH1, T1,
TE1, L1, LE1, DT1, E2. TE1 and LE1 require host system support.
Logic Levels, Line Drivers, Line Terminations, and Line Receivers:
All characteristics conform to IEEE Standard 488-1978.
Maximum Cable Length for Standard Operation: 2 meters (6.5 ft) per
device connected, with a 20-meter (65 ft) total length. The maximum
number of devices is accommodated by interconnections using shorter
than maximum cable length.
Maximum cable length for high-speed operation: Interconnecting
cable links should be as short as possible, with a maximum of 15 meters
total length per system, and should have at least one equivalent
resistive load per meter of cable (the high-speed resistor pack adds
seven equivalent resistive loads).
Number Maximum Total
of Cable Length
Devices <meters)
1 6
2 9
3 10
4 11
5 12
6 13
7 14
8 (maximum) 15
No more than eight devices are allowed in the system. A maximum system
would be composed of a System Controller, with its high-speed resistor
pack, and eight peripherals. Load resistors may need to be repositioned
on the interface card for high-speed operation. Refer to the
installation manual.
Note: For high- and low-speed cable length operation, refer to the
installation manual (P/N 27113-90001).
Error Detection
Data errors can be detected using Cyclic Redundancy Check-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.
Diagnostic Support
An interface resident self-test, initiated on reset, is provided in the
firmware of the HP 27113A.
Electrical Specifications
Voltage Current Power
Dissipation
+5V 1.8A 9.0 watts
+12V 35 mA 0.42
Physical Characteristics
Size: 172.7 mm (6.80 in long by 172 mm (6.75 in) wide
Weight: 234 g (8.2 oz); 679 g (23.8 oz) with HP-IB cable
I/O Channel Interconnects: 80-pin connector, J1
Device Interconnects: 26-pin connector, J2
Environmental Characteristics
Operating Temperature: 0 degrees C to 55 degrees C (32 degrees F to
131 degrees F)
Operating Relative Humidity: 5% to 95% RH at 40 degrees C (104
degrees F)
Operating Altitude: 4600 m (15,000 ft) maximum
Ordering Information
The HP 27113A includes:
27113-60301 HP-IB Interface Card for HP 3000 Series 900
27113-63001 4-meter HP-IB Cable
27113-90001 Installation Manual for MPE/XL Systems
30070-00043 HP-IB Backplate
HP 27113A Option
001 Deletes manual
002 Firmware upgrade
003 Sliverspan adapter
From HP Networking Communications Specifications Guide,
5091-3821E, 9205, p 248
Associated files: la3821n8.gal, la3821n8.plt
HP-IB* Interface for HP 3000 Series 900 Computer Systems, Technical
Data