Measurement PC-CARD-DAS16330 User Manual

Parallel488

Bus Converter

INSTRUCTION MANUAL

IOtech, Inc. • 25971 Cannon Road • Cleveland, Ohio 44146 • [phone]

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fax machine, or e-mail in regard to warranty-related issues.
Phone: [phone], fax: [phone], e-mail: [e-mail]

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FCC Statement

IOtech devices emit radio frequency energy in levels compliant with Federal Communications Commission rules (Part 15)
for Class A devices. If necessary, refer to the FCC booklet How To Identify and Resolve Radio-TV Interference Problems
(stock # 004-000-00345-4) which is available from the U.S. Government Printing Office, Washington, D.C. 20402.

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Many IOtech products carry the CE marker indicating they comply with the safety and emissions standards of the
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specifications and operating conditions apply.

Warnings, Cautions, Notes, and Tips

Refer all service to qualified personnel. This caution symbol warns of possible personal injury or equipment damage
under noted conditions. Follow all safety standards of professional practice and the recommendations in this manual.
Using this equipment i n ways other than described in t his manual can present serious safety hazards or cause equipment
damage.

This ESD caution symbol urges proper handling of equipment or components sensitive to damage from electrostatic
discharge. Proper handling guidelines include the use of grounded anti-static mats and wrist straps, ESD-protective
bags and cartons, and related procedures.

Specifications and Calibration

Specifications are subject to change without notice. Significant changes will be addressed in an addendum or revision to the manual. As applicable, IOtech calibrates its
hardware to published specifications. Periodic hardware calibration is not covered under the warranty and must be performed by qualified personnel as specified in this
manual. Improper calibration procedures may void the warranty.

Quality Notice

IOtech has maintained ISO 9001 certification since 1996. Prior to shipment, we thoroughly test our products and
review our documentation to assure the highest quality in all aspects. In a spirit of continuous improvement, IOtech
welcomes your suggestions.

Parallel488

User's Manual

138-0920

Revision 3.1

January 1992

IOtech, Inc.

" 25971 Cannon Road " Cleveland, Ohio 44146 " [phone]

Table of Contents

Section 1 Introduction Page

1.1 Description 1.1

1.2 Specifications 1.2

1.3 Abbreviations 1.3

Section 2 Getting Started Page

2.1 Inspection 2.1

2.2 Configuration 2.1

2.2.1 IEEE Address Selection 2.2

2.2.2 Auto-Linefeed Selection 2.3

2.2.3 Mode Selection 2.4

2.3 Operation 2.4

Section 3 Parallel To IEEE Operation Page

3.1 Parallel To IEEE 488 Mode Operation 3.1

3.2 Parallel Data Tran sf er s 3.1

3.3 IEEE Address Selection 3.2

3.4 Plo tter Applications 3.2

3.5 Printer Applications 3.4

3.6 Parallel Interface Descriptions and Timing 3.4

Section 4 IEEE To Parallel Operation Page

4.1 IEEE To Parallel Mode Operation 4.1

4.2 IEEE Data Transfers 4.1

4.2.1 Blind Bus Data Transfers 4.1

4.2.2 Controlled Bus Data Transfers 4.2

4.3 Ser ial Poll Status Byte Register 4.3

4.4 IEEE 488 Bus Implementation 4.4

4.4.1 My Talk Address (MTA) 4.4

4.4.2 My Listen Address (MLA) 4.5

4.4.3 Device Clear (DCL and SDC) 4.5

4.4.4 Interface Clear (IFC) 4.5

4.4.5 Serial Poll Enable (SPE) 4.5

4.4.6 Serial Poll Disable (SPD) 4.5

4.4.7 Unlisten (UNL) 4.5

4.4.8 Untalk (UNT) 4.6

Table of Contents

Section 4 IEEE To Parallel Operation Page

4.5 IEEE Address Selection 4.6

4.5.1 Listen Only Mode 4.6

4.6 Parallel Interface Description and Timing 4.7

Section 5 IEEE 488 Primer Page

5.1 History 5.1

5.2 General Structure 5.1

5.3 Send It To My Address 5.4

5.4 Bus Management Lines 5.4

5.4.1 Attention (ATN) 5.4

5.4.2 Interface Clear (IFC) 5.5

5.4.3 Remote Enable (REN) 5.5

5.4.4 End Or Identify (EOI) 5.5

5.4.5 Service Request (SRQ) 5.5

5.5 Handshake Lines 5.6

5.5.1 Data Valid (DAV) 5.6

5.5.2 Not Ready For Data (NRFD) 5.6

5.5.3 Not Data Accepted (NDAC) 5.6

5.6 Data Lines 5.7

5.7 M ultiline Commands 5.7

5.7.1 Go To Local (GTL) 5.7

5.7.2 Listen Address Group (LAG) 5.8

5.7.3 Unlisten (UNL) 5.8

5.7.4 Talk Address Group (TAG) 5.8

5.7.5 Untalk (UNT) 5.8

5.7.6 Local Lockout (LLO) 5.8

5.7.7 Device Clear (DCL) 5.8

5.7.8 Selected Device Clear (SDC) 5.9

5.7.9 Serial Poll Disable (SPD) 5.9

5.7.10 Serial Poll Enable (SPE) 5.9

5.7.11Group Execute Trigger (GET) 5.9

5.7.12Take Control (TCT) 5.9

5.7.13Secondary Command Group (SCG) 5.9

5.7.14Parallel Poll Configure (PPC) 5.10

5.7.15Parallel Poll Unconfigure (PPU) 5.10

5.8 More On Service Requests 5.10

Table of Contents

5.8.1 Serial Poll 5.11

5.8.2 Parallel Poll 5.11

Section 6 Service Information Page

6.1 Factory Service 6.1

6.2 Theory of Operation 6.1

6.3 Component Layout (Mother Board) 6.2

6.4 Component Layout (I/O Board) 6.3

6.5 Replaceable Parts List 6.4

Appendix A ASCII Character Codes A.1

Section 1 Introduction

Introduction

1.1 Description

The Parallel488 is an intellegent Bus Converter that provides transparent
conversion from an IEEE 488 device to a parallel (Centronics) device, or from a
parallel device to an IEEE 488 device. Common applications include
interfacing an IBM PC's parallel port to the IEEE port on an HP plotter, or
interfacing an IEEE controller to a parallel printer.

A buffer capable of storing 24,000 characters is built-in to the
Parallel488, allowing the computer to unload an entire document, and proceed
to another task while the Parallel488 spools data to the receiving device. The
Parallel488 spools characters to the receiving device until the Parallel488's
buffer is empty. Also included in the Parallel488 is the capability to
automatically insert a line-feed character upon receipt of carriage-return
character. This is useful in assuring compatability with a wide variety of
computers, instruments, printers, and plotters.

1.1

Section 1 Introduction

1.2 Specifications

IEEE 488-1978
Implementation: C1, C2, C3, C4 and C28 controller
subsets.(Parallel to IEEE)

SH0, AH1, T0, TE0, L4, LE0, SR0, RL0, PP0,
DC1, DT0, E1.

Connector: Standard IEEE 488 connector with metric studs.

Parallel (Centronics)
Terminator: Selectable Auto-LF (IEEE to Parallel).
Connector: Standard 36-pin male Centronics style

General
Data Buffer: 24,000 characters
Indicators: LEDs for IEEE Talk and Listen, Parallel Send

and Receive, and Power.
Power: 105-125V or 210-250V; 50-60 Hz, 10 VA Max.
Dimensions: 188mm deep x 140mm wide x 68mm high

7.39" x 5.5" x2.68").
Weight: 1.55 kg. (3.6 lbs).
Environment: 0¡ - 50¡C; 0 to 70% R.H. to 35¡C.

Linearly derate 3% R.H./¡C from 35¡ to 50¡C.

Controls: Power Switch (external), IEEE

parameter switches (internal).

and parallel

Specifications subject to change without notice.

1.2

Section 1 Introduction

1.3 Abbreviations

The following IEEE 488 abbreviations are used throughout this manual.

addr n IEEE bus address "n"
ATN Attention line
CA Controller Active
CO Controller
CR Carriage Return
data Data String
DCL Device Clear
GET Group Execute Trigger
GTL Go To Local
LA Listener Active
LAG Listen Address Group
LF Line Feed
LLO Local Lock Out
MLA My Listen Address
MTA My Talk Address
PE Peripheral
PPC Parallel Poll Configure
PPU Parallel Poll Unconfigure
SC System Controller
SDC Selected Device Clear
SPD Serial Poll Disable
SPE Serial Poll Enable
SRQ Service Request
TA Talker Active
TAD Talker Address
TCT Take Control
term Terminator
UNL Unlisten
UNT Untalk
* Unasserted

1.3

Section 2 Getting Started

Getting Started

2.1 Inspection

The Parallel488 was carefully inspected, both mechanically and electrically, prior
to shipment. When you receive the interface, carefully unpack all items from the
shipping carton and check for any obvious signs of physical damage which may have
occurred during shipment. Immediately report any damage found to the shipping agent.
Remember to retain all shipping m aterials in the ev ent that shipment back to the facto ry
becomes necessary.

Every Parallel488 is shipped with the following....



Parallel488 Bus Converter Interface



138-0920 Instruction Manual





TR-2 Power Supply [110v] or





TR-2E Power Supply [220/230v]



Note: Other accessories ordered may be packaged and shipped separately.

2.2 Configuration

The Parallel488 has two modes of operation; as a parallel to IEEE 488 converter,
or as an IEEE 488 to parallel converter. A DIP switch internal to the Parallel488
determines which one of these modes the product will assume. Also selectable is the
automatic insertion of a line feed character after receipt of a carriage return, and the IEEE
address (for the IEEE to parallel mode only). On the following page are the Parallel488
factory default settings.

2.1

Section 2 Getting Started

SW1 Factory Default Settings

Switch

Side
View

DOT

IEEE Address
Auto Linefeed

Mode

12345678

OPEN

10

Disabled

Parallel to IEEE

To modify any of these defaults, follow this simple procedure:

Disconnect the power supply from the AC line and from the interface.

Disconnect any IEEE or parallel cables prior to dissassembly.

WARNING

Never open the Parallel488 case while it is conn ected
to the AC line. Failure to obser ve this warning may
result in equipment failure, personal injury or death.

Remove the four screws located in each corner of the rear panel. Hold the case
firmly and pull the rear panel outward, noting the slot location of the main circuit board.
Modify those parameters which are
unit. Slide the main

circuit board into the previously noted slot and finish reassembly by

appropriate for your installation and reassemble the

tightening the four screws into the rear panel.

2.2

Section 2 Getting Started

SW1 View for IEEE Bus Address Selection

12345678

0
1

OPEN

IEEE Address = 10

0 x 16
1 x 8
0 x 4
1 x 2
0 x 1

+

Switch

Side
View

= 0
= 8
= 0
= 2
= 0

DOT

When all switches are in the "open" position (addr ess 3 1) , the Para llel488 is

Listen Only

in the

mode. This mode enables a

TALK ONLY

device, such as an
digital voltmeter or data logger, to send data directly to the Parallel488 without
requiring a controller.

2.2.2 Auto-Linefeed Selection

Switch SW1-6 selects whether auto-linefeed is selected. When SW1-6 is in
the "closed" position, no extra characters are added to received data. When SW1-6
is in the "open" position, the Parallel488 automatically inserts a linefeed character

the data stream after receiving a carriage-return. This feature is necessary

into
when both the data source does not send line feeds with each carriage-return, and
the receiving device does not insert linefeeds upon receipt of a carriage-return.

This feature is functional in both operating modes of the Parallel488. The
factory default condition is auto-linefeed disabled. It will become immediately
evident

that this feature should be enabled if your printed material all appears on

one line.

2.3

Section 2 Getting Started

SW1 View for Auto-Linefeed Selection

12345678

OPEN

Auto-Linefeed Disabled Auto-Linefeed Enabled

12345678

OPEN

Switch

Side
View

DOT

2.2.3 Mode Selection

The Parallel488 mode is selected with SW1-7 in either the parallel to IEEE
mode (described in Section 3), or the IEEE to parallel mode (described in Section

4). The product operates in only one of two modes, and cannot communicate in
both modes simultaneously. The factory default is the parallel to IEEE mode.

SW1 View for Mode Selection

12345678

OPEN

IEEE to Parallel Mode Parallel to IEEE Mode

2.3 Operation

12345678

OPEN

Switch

Side
View

DOT

After setting the Parallel488 to the proper switch selections and reassembling the

unit, plug the power supply connector into the rear jack on the interface.

CAUTION

Never install the power supply into the interface while it is
connected to AC line power. Failure to observe th is caution

result in damage to the Parallel488.

may

2.4