ASeries A704 User Manual MultiPort Converter
Contents
1. noe o on on on 7 Even 4 6 4 6 1 4 6 2 4 6 3 A704 MultiPort User Manual Internal Jumper Settings The internal jumpers are inside the A704 and are accessed by removing the single screw holding the lid They are located on the Printed Circuit Board directly behind the serial connector Serial RS 232 as DTE Factory Default To set the A704 to Serial RS 232 and DTE use the following settings J6J5 J4 J3 J2 Ji ii Internal Jumper Settings da A Serial Port set to RS 232 Lu olol OYOFOVO Serial Port set to DTE 422 232 Serial RS 232 as DCE To set the A704 to Serial RS 232 and DCE use the following settings J6 J5 J4 J3 J2 Ji Internal Jumper Settings X ji set Serial Port set to RS 232 gt HHHH 8 olol Serial Port set to DCE DCE DTE Serial RS 422 as DTE To set the A704 to Serial RS 422 use the following settings J6 J5 ojoj LE Internal Jumper Settings Serial Port set to RS 422 422 232 Note RS 422 can only be used with Software handshaking Xon Xoff The DCE DTE jumpers have no effect when RS 422 is selected A704 MultiPort User Manual 5 0 5 1 5 2 6 0 7 0 7 1 POWER REQUIREMENTS Powered from the printer The A704 is normally powered from pin 18 of the parallel connector of the printer and requires only 140mA to operate Some printers use a limiting resistor on pin 18 which may not provide enough power to operate the A704 In th2. 600 bits per second 1 8 Data Bits HT No Parity Te 2 3 45678 DTR DSR Handshaking 1 Stop Bit J6 J5 J4 J3 J2 J1 Internal Jumper Settings Serial Port set to RS 232 Serial Port set to DTE 422 232 DCE DTE TIMEOUT Settings The Timeout is used to tell the A704 how long to wait for data from one port before switching to the other port A Timeout of 10 seconds is recommended for most applications and 20 seconds is recommended for CAD Windows and programs which tend to periodically pause during printing Flow Control Robust Xon Xoff The A704 uses the Robust Xon Xoff form of Software Handshaking on the input RS 232 Serial Port This is implemented to prevent Xon Xoff lockup situations The behaviour of the Xon Xoff flow control buffer is as follows Xoff is issued when there are 35 bytes remaining in the buffer Xon is issued if there are more than 48 bytes available in the buffer Robust Xon time interval is 5 seconds A704 MultiPort User Manual 4 5 DIP Switch Settings Table 4 1 Table 4 2 Table 4 3 ee ETS RTE Handshaking DTR DSR ee Bits Per Second refer to Table 2 7 Data Bits Parity amp Test Mode refer to Table 3 sa oe om ae os ow ne a Ps Por fen or on for on or fon La Tor on on on fom or fon on on Por or or Fon on fon on ae Data Bits Stop Bits Self Test on onon e ee 7 Malle oo Con or on e os m ron or on e
3. R OMAN OO O1 ON gt N N N OO J BR O1 D WO COON OO FW ND A704 MultiPort User Manual Shield Shield RS 232 Connection to other RS 232 Devices Shield FG RD TD CTS RTS DTR SG DCD DSR N 0OONOARARAOO0ONO TD RD RTS CTS DSR SG DCD DTR A 01 D W FG RD TD CTS RTS DTR SG DCD DSR AO RS 232 Connection to a PC with a DB 25 Serial Connector PC Cable End DTE T DB 25 Female RS 232 Connection to a PC with a DB 9 Serial Connector PC Cable End e DB 9 Female User Device Cable End A704 MultiPort User Manual Input Output Input Output Output Input Pulled High RS 422 FG 8 0 PORT PINOUTS 8 1 Centronics Parallel Ports Pin Signal Input Output Pin Signal 1 Data Strobe Input Output 19 Ground 2 Data Bit 1 Input Output 20 Ground 3 Data Bit 2 Input Output 21 Ground 4 Data Bit 3 Input Output 22 Ground 5 Data Bit 4 Input Output 23 Ground 6 Data Bit 5 Input Output 24 Ground 7 Data Bit 6 Input Output 25 Ground 8 Data Bit 7 Input Output 26 Ground 9 Data Bit 8 Input Output 27 Ground 10 Acknowledge Output Input 28 Ground 11 Busy Output Input 29 Ground 12 Paper Error Output Input 30 Ground 13 Select Output Input 31 Initialize 14 Autofeed Input Output 32 Error 15 Not Connected 33 Ground 16 Ground 34 Not Connected 17 Ground 35 Connected 18 Connected Pulled High 5V 36 Select In 8 2 RS 232 and RS 422 Serial Ports The RS 232 Serial Port of t
4. User Manual ASeries A704 MultiPort Converter Serial amp Parallel Parallel ALFATRON The interfacing specialists A704 MultiPort User Manual Version 1 00 March 1999 COPYRIGHTS All rights reserved This document may not in whole or part be copied photocopied reproduced translated or reduced to any electronic medium or machine readable form without the express permission in writing from Alfatron Pty Ltd Copyright 1999 Alfatron Pty Ltd DISCLAIMER Alfatron Pty Ltd has made every attempt to ensure that the information contained in this document is accurate and complete Alfatron Pty Ltd makes no representation or warranties of merchantability or fitness for any particular purpose Alfatron Pty Ltd reserves the right to make changes to this document at any time without notice Therefore Alfatron Pty Ltd assumes no liability for damages incurred directly or indirectly from errors omissions or discrepancies with the hardware and the manual TRADEMARKS All Company and Product names are trademarks of the Company or Manufacturer respectively WARRANTY Alfatron warrants its products against defects in materials and workmanship for a period of one year from receipt by the customer All warranty is carried out on a return to depot basis unless an alternative warranty coverage has been arranged WARRANTY EXCLUSIONS The above warranty shall not apply to defects resulting from improper or inadequate maintenance by t
5. he A704 MultiPort may be configuired as either DTE or DCE by setting the internal jumpers J1 J2 J3 and J4 RS 232 Pin Status DCE DTE 1 Frame Ground FG FG 2 Data Input Output RD TD 3 Data Input Output TD RD 4 Not used Pulled High CTS RTS 5 Not used Pulled High RTS CTS 6 Handshake Input Output DTR DSR 7 Signal Ground SG SG 8 Not used Pulled High DCD DCD 15 Data Input 17 Data Input 19 Data Output 20 Handshake Input Output DSR DTR 25 Data Output Note 1 Maximum baud rate of 38 400bps applies to RS 232 and RS 422 2 RS 422 suitable for operation with software handshake only A704 MultiPort User Manual 9 0 SPECIFICATIONS CPU Parallel Ports Serial Ports Flow Control Buffer LED Indicators Power Supply Dimensions Weight Operating Temp Stroage Temp 89C51 Microprocessor 14 7456MHz Centronics Parallel Input 36 pin Centronics female connector Output 36 pin Centronics male connector Asynchronous RS 232 and RS 422 Full duplex communication DB 25 female connector DTE DCE Selectable RS 232 Only DIP Switch Selection Baud Rate 38400 19200 9600 4800 bps 2400 1200 600 and 300 Data Bits 7or8 Parity None Odd or Even Stop Bits 1 or 2 Handshaking Software Robust Xon Xoff Hardware DTR DSR RS 232 Only 58 byte receive buffer Power On Yellow Data Error Red Transmit Data Green Receive Data Green 5VDC from printer parallel connector Pin 18 Current co
6. he customer unauthorised modifications or misues operation outside the environmental specifications for the product damage due to power surges lightening strikes or any other phenomenon outside normal operational specifications Alfatron Pty Ltd ACN 005 410 819 P O Box 4161 Unit 9 36 New St Ringwood VIC 3134 AUSTRALIA www alfatron com au 1 0 A704 MultiPort User Manual PRODUCT DESCRIPTION The ASeries A704 MultiPort provides both Serial and Parallel connection to a printer with only a parallel port Switching between the two input ports is fully automatic on a first come first served basis While one port is active the other will return a presently busy signal to the host computer Parallel Output External Power A Adapter Socket o a ALFATRON Sa INPUT LEDs v lt Parallel aralle INPUT Serial Port p gt hen TD Error P RD Power yY 2 0 LEDs see diagram E t DIP Switches Side Figure 1 A704 MultiPort Layout INSTALLATION Before installing the A704 MultiPort please make sure that the DIP Switches are set correctly to meet your serial port requirements Please refer to Section 4 for complete details of the DIP Switch Settings Once the DIP Switches are set the A704 may be plugged directly into the parallel connector of the printer It is connected to the parallel port of the printer and takes its power from this port if available from pin 18 otherwise a se
7. is case the optional power adapter socket must be used to provide external power External Power Adapter The A704 may be powered from an external power adaptor which must provide a 9VDC power supply with a minimum current of 200mA The plug must have an inner diameter of 2 5mm and an outer diameter of 5 5mm and must be wired for outer negative CABLE REQUIREMENTS Alfatron recommends the use of shielded cable with all of its products Shielding reduces EMI radiation and improves noise immunity This helps minimise interference to other equipment and will improve communications reliability The recommended cable construction is as follows Take the shield surrounding cable wires and solder it to the Frame Ground FG pin If FG is not available use Signal Ground but in this case always use a separate wire to connect Signal Ground at both ends The shield must be connected at both ends of the cable CABLE EXAMPLES RS 422 Connection to other RS 422 Devices Shield A704 Cable End P FG 1 e e FG SG 7 _ SG CE TD 25 C ap User Device TD 19 RD Cable End DB 25 Male RD 17 TD RD 15 __ To 7 2 A704 Cable End DTE ED DB 25 Male 7 3 A704 Cable End DCE C DB 25 Male 7 4 A704 Cable End DTE eee DB 25 Male FG TD RD RTS CTS DSR DCD DTR RD TD CTS RTS DTR DCD DSR FG TD RD RTS CTS DSR SG DCD DT
8. lt gt ABCDEFGHIJKLMNOPQRSTUVWXYZ _ abcdefghijklmnopqrstuvwxyz 0123456789 lt gt ABCDEFGHIJKLMNOPQRSTUVWXYZ _ abcdefghijklmnopqrstuvwxyz 0123456789 lt gt ABCDEFGHIJKLMNOPQRSTUVWXYZ _ abcdefghijkl mnopqrstuvwxyz 0123456789 lt gt ABCDEFGHIJKLMNOPQRSTUVWXYZ _ abcdefghijkl mnopqrstuvwxyz 0123456789 lt gt ABCDEFGHIJKLMNOPQRSTUVWXYZ _ abcdefghijklmnopqrstuvwxyz 0123456789 lt gt ABCDEFGHIJKLMNOPQRSTUVWXYZ _ abcdefghijklmnopqrstuvwxyz 0123456789 lt gt ABCDEFGHIJKLMNOPQRSTUVWXYZ _ abcdefghijklmnopqrstuvwxyz This output will continue as long as the printer is powered ON Data will also be output from the Serial port even though it is used as an Input during normal operation To stop the output simply turn the printer OFF Step 4 With the printer turned OFF the A704 DIP Switches should be returned to their original settings for normal use 4 0 4 1 4 2 4 3 4 4 A704 MultiPort User Manual HARDWARE CONFIGURATION Setting the DIP Switch Before attempting to change DIP Switch settings disconnect the A704 from its power source The DIP switches are only read when the A704 is powered on They are located beside the LEDs as shown in Section 1 Figure 1 Default Factory Settings The A704 has its DIP settings and Internal Jumpers factory pre set to the following configuration DIP Switch Settings Timeout of 10 seconds B e 9
9. nsumption Standby 110mA Operating 140mA Optional 9VDC 200mA Power Adapter 5 5mm outer 2 5mm inner diameter Polarity is Outer Negative O 115mm x 72mm x 24mm 565 grams 0 to 40 C 20 to 70 C All specifications subject to change without notice N42 DECLARATION OF CONFORMITY according to the European Commissions EMC Directive 89 336 EEC We Name of Manufacturer ALFATRON PTY LTD of Address of Manufacturer UNIT 9 36 NEW ST RINGWOOD VIC 3134 AUSTRALIA Australian Company Number ACN 005 410 819 declare under sole responsibility that the product Product Name ASeries MultiPort Serial amp Parallel to Parallel Interface Converter Model Number A704 to which this declaration relates is in conformity with the following standards CISPR 22 EN 55022 class B EMI from Information Technology Equipment ITE IEC 801 2 prEN55024 2 Electro Static Discharge Immunity IEC 801 3 prEN55024 3 Radiated RF Immunity IEC 801 4 prEN55024 4 Electrical Fast Transients Immunity
10. perate power adaptor may be used Turn the printer ON and observe the LEDs on the A704 MultiPort The Power LED should light up and remain alight The RD TD and Error LEDs should light up and then extinguish within 2 seconds After this sequence the unit is ready for operation Power the printer OFF and connect the correct cables between the A704 MultiPort and the host devices Use only cables which you know to have the correct pin configurations to match the A704 to your equipment Cable requirements are discussed in Sections 6 and 7 NOTE All devices must be powered OFF before connecting cables to them 1 A704 MultiPort User Manual 3 0 CHARACTER GENERATION FUNCTION SELF TEST The A704 MultiPort has a built in Self Test Mode which will output a continuous stream of printable ASCII characters to a printer This function may be used to self test the A704 MultiPort or to test the operation of other devices and is activated in the following manner Step 1 Take note of the original DIP Switch settings on the A704 MultiPort and then turn the printer OFF Step 2 Select Self Test mode by setting the DIP Switch as follows Step 3 Turn the printer ON the output produced by the Self Test function is as follows 0123456789 lt gt ABCDEFGHIJKLMNOPQRSTUVWXYZ _ abcdefghijkl mnopaqrstuvwxyz 0123456789 lt gt ABCDEFGHIJKLMNOPQRSTUVWXYZ _ abcdefghijkl mnopqrstuvwxyz 0123456789
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