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MARCH 1998
IC026A-R2
IC026AE-R2
RS-232↔IEEE 488
Interface Converter
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INFORMATION
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TALK LISTEN SRQ ERROR POWER
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RS-232↔IEEE 488 INTERFACE CONVERTER EUROPEAN UNION DECLARATION OF CONFORMITY To maintain safety, emission, and immunity standards of this declaration, the following conditions must be met. • Serial and IEEE cables must have a braided shield connected circumferentially to their connectors’ metal shells. • All cable screw locks must be tightened at both ends of the cable. • The host computer must be properly grounded. • Some inaccuracy is to be expected when I/O leads are exposed to RF fields o
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WARNING! Noted conditions pertain to potential safety hazards. When you see a WARNING!, CAUTION!, or IMPORTANT! note, carefully read the information and be alert to the possibility of personal injury. Failure to follow these directives voids emission and immunity compliance. TRADEMARKS USED IN THIS MANUAL ® ® ® AT , IBM , and PS/2 are registered trademarks, and PC/XT is a trademark, of IBM Corporation. ® Macintosh is a registered trademark of Apple Computer, Inc. ® ® ® Hewlett-Packard , HP , an
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RS-232↔IEEE 488 INTERFACE CONVERTER FEDERAL COMMUNICATIONS COMMISSION AND INDUSTRY CANADA RADIO FREQUENCY INTERFERENCE STATEMENTS This equipment generates, uses, and can radiate radio frequency energy and if not installed and used properly, that is, in strict accordance with the manufacturer’s instructions, may cause interference to radio communication. It has been tested and found to comply with the limits for a Class A computing device in accordance with the specifications in Subpart J of Pa
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NOM STATEMENT NORMAS OFICIALES MEXICANAS (NOM) ELECTRICAL SAFETY STATEMENT INSTRUCCIONES DE SEGURIDAD 1. Todas las instrucciones de seguridad y operación deberán ser leídas antes de que el aparato eléctrico sea operado. 2. Las instrucciones de seguridad y operación deberán ser guardadas para referencia futura. 3. Todas las advertencias en el aparato eléctrico y en sus instrucciones de operación deben ser respetadas. 4. Todas las instrucciones de operación y uso deben ser seguidas. 5. El aparat
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RS-232↔IEEE 488 INTERFACE CONVERTER 11. El aparato eléctrico deberá ser connectado a una fuente de poder sólo del tipo descrito en el instructivo de operación, o como se indique en el aparato. 12. Precaución debe ser tomada de tal manera que la tierra fisica y la polarización del equipo no sea eliminada. 13. Los cables de la fuente de poder deben ser guiados de tal manera que no sean pisados ni pellizcados por objetos colocados sobre o contra ellos, poniendo particular atención a los contactos
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CONTENTS Contents Chapter Page 1. Specifications..................................................................................................10 2. Introduction ...................................................................................................12 2.1 Description ............................................................................................12 2.2 Abbreviations.........................................................................................13 3. Getting St
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RS-232↔IEEE 488 INTERFACE CONVERTER Chapter Page 4.4 Talk-Back Features ................................................................................34 4.4.1 Talk-Back on Terminator..........................................................34 4.4.2 Talk-Back on Timeout...............................................................36 4.5 Plotter Applications...............................................................................38 4.6 Printer Applications ................................
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CONTENTS Chapter Page 6.5 Handshake Lines...................................................................................57 6.5.1 Data Valid (DAV).......................................................................57 6.5.2 Not Ready For Data (NRFD) ....................................................57 6.5.3 Not Data Accepted (NDAC) .....................................................57 6.6 Data Lines ........................................................................................
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RS-232↔IEEE 488 INTERFACE CONVERTER 1. Specifications IEEE-488 Interface Implementation — C1, C2, C3, C4, and C28 controller subsets. Serial to IEEE: SH1, AH1, T6, TE0, L4, LE0, SR1, RL0, PP0, DC1, DT0, E1. Terminators — Selectable CR, LF, LF-CR, and CR-LF with EOI Connector — Standard IEEE 488 connector with metric studs Serial Interface EIA RS-232C — AB, BA, BB, CA, CB EIA RS-422A — Balanced voltage on TxD and RxD Character Set — Asynchronous bit serial Output Voltage — ±5 volts min. (RS-232C
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CHAPTER 1: Specifications General Data Buffer — 32,000 characters dynamically allocated Indicators — LEDs for IEEE Talk and Listen, Serial Send and Receive, and Power Power — 105-125V or 210-250V; 50-60 Hz, 10 VA max. Size — 2.7"H x 5.5"W x 7.4"D (6.9 x 14 x 18.8 cm) Weight — 3.6 lb. (1.6 kg) Environment — 0 to 50°C; 0 to 70% R.H. to 35°C. Linearly derate 3% R.H./degrees Centigrade from 35 to 50°C Controls — Power Switch (external), IEEE and Serial parameter switches (internal). Jumper selection
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RS-232↔IEEE 488 INTERFACE CONVERTER 2. Introduction 2.1 Description The RS-232↔488 Interface Converter provides transparent communication from a serial computer to an IEEE 488 printer, plotter, or other device. It also can be used to control a serial device, such as a printer or terminal, from an IEEE 488 host computer. As a serial-to-IEEE-488 converter, the interface converter receives data from a serial host then automatically performs the bus sequences necessary to send this data to the IEEE
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CHAPTER 2: Introduction 2.2 Abbreviations The IEEE 488 abbreviations listed below 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 Controll
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RS-232↔IEEE 488 INTERFACE CONVERTER 3. Getting Started 3.1 Inspection The interface converter was carefully inspected, both mechanically and electrically, prior to shipment. When you receive it, carefully unpack all items from the shipping carton and check for any obvious signs of damage that may have occurred during shipment. Immediately report any damage found to the shipping agent. Remember to retain all shipping materials in the event that shipment back to the factory becomes necessary. Ever
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CHAPTER 3: Getting Started DOT 1 2 3 4 5 6 7 8 Switch Side View OPEN 10 IEEE Addr LF IEEE Term Disabled EOI 1 2 3 4 5 6 7 8 DOT Switch Side View OPEN C Mode Enabled Talk-Back on Timeout LF Serial Term No Echo Echo No Parity Parity DOT 1 2 3 4 5 6 7 8 Switch Side View OPEN 9600 Baud Rate RTS/CTS Handshake 8 Data Bits Word Length Enabled Talk-Back on Term 2 Stop Bits Stop Bits Figure 3-1. Factory-Default Settings. 15 SW1 SW2 SW3
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RS-232↔IEEE 488 INTERFACE CONVERTER Note that the interface converter comes configured as an IEEE controller. In this mode, the interface converter is designed to allow an RS-232 computer to communicate with an IEEE peripheral such as a plotter. This controller mode is described in detail in Chapter 4. The interface converter may also be configured as an IEEE peripheral. As an IEEE peripheral, it allows an IEEE controller to communicate with an RS-232 device. The peripheral mode of operation is
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CHAPTER 3: Getting Started 1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8 DOT Switch 110 1800 Side View OPEN OPEN 1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8 110 2400 OPEN OPEN 1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8 110 3600 OPEN OPEN 1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8 135 4800 OPEN OPEN 1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8 15 0 7200 OPEN OPEN 1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8 300 9600 OPEN OPEN 1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8 600 19,200 OPEN OPEN 1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8 1200 57,600 OPEN OPEN Figure 3-2. Switch SW1: Selecting the
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RS-232↔IEEE 488 INTERFACE CONVERTER 3.3.2 SERIAL WORD LENGTH (DATA BITS) SW1-6 determines the number of data bits, often referred to as word length, for each serial character transmitted or received. The factory default is 8 data bits. 1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8 DOT Switch Side View OPEN OPEN 8 Data Bits 7 Data Bits Figure 3-3. Switch SW1: Selecting the Serial Word Length (Data Bits). 3.3.3 SERIAL STOP BITS Switch SW1-8 determines the number of stop bits contained in each serial character t
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CHAPTER 3: Getting Started 3.3.4 SERIAL PARITY Serial Parity is selected with S2-6 through S2-8. The interface converter generates the selected parity during serial transmissions but it does not check parity on data that is received. The factory default is parity disabled. 1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8 DOT Switch Side View OPEN OPEN Odd Parity Mark Parity 1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8 OPEN OPEN Even Parity Space Parity 1 2 3 4 5 6 7 8 OPEN Parity Disabled Figure 3-5. Switch SW2: Selecting t
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RS-232↔IEEE 488 INTERFACE CONVERTER 3.3.6 SERIAL HANDSHAKE Switch SW1-5 is used to select hardware [RTS/CTS] or software [Xon/Xoff] serial handshake control. With X-ON/X-OFF, the interface converter issues an X-OFF character [ASCII value of $13] when its buffer memory is near full. When the X-OFF character is sent, there are still more than 1000 character locations remaining to protect against buffer overrun. When it is able to accept more information, the inter- face converter issues an Xon cha
