ASeries A510 User Manual Interface Converter
Contents
1. 4 1 4 2 4 3 4 4 A510 User Manual HARDWARE CONFIGURATION How to set the DIP Switch Before attempting to change the DIP Switch settings remove the power plug from the A510 All DIP switches are read only once when the A510 is powered ON and are located at the side of the A510 as shown in Section 1 Figure 1 Default Factory DIP Switch Settings The A510 is factory pre set to the following configuration Parallel port as OUTPUT 9600 bps 8 Data Bits No Parity DTR DSR Handshaking 1 Stop Bit DTE DCE Serial RS 232 Port Selection DTE lt gt DCE To make cabling easier the RS 232 Serial Port may be switch selected as either DTE or DCE via the slide switch loacted at the side of the A510 The factory setting is DCE Providing power through the Parallel Port Connector The A510 may be powered directly through pin 18 of the Centronics parallel port connector A steady 5 volts at 200mA is needed for the A510 to operate normally Note an internal blocking diode in the A510 circuit prevents any power going out from pin 18 of the Centronics parallel port connector A510 User Manual 4 5 DIP Switch Settings Table 4 1 Table 4 2 Table 4 3 Parallel Port Direction Output input ea Handshaking DTR DSR ee Bits Per Second refer to Table 2 7 Data Bits Parity amp Test Mode refer to Table 3 saa oe om ae am wm oak ma 2 Por on or on or on or or rs2. iaa User Device mp RD 18 FF 10 DTR 20 DSR Cable End DB 25 Male DTR 23 gt DSR DSR 6 _ DTR DSR 22 sy DTR A510 User Manual 6 0 FLOW CONTROL Handshaking 6 1 6 2 7 0 Hardware DTR DSR Handshaking Hardware DTR DSR handshaking uses the Data Terminal Ready DTR and Data Set Ready DSR signal lines to control the flow of data between devices This form of handshaking is recommended and is the preferred method of handshaking under the DOS operating system Software Handshaking Robust Xon Xoff Robust Xon Xoff handshaking overcomes limitations in the Standard Xon Xoff protocol by ensuring that the A510 device repeatedly sends Xon Xoff characters to the connected device For example without Robust Xon Xoff if an Xoff is sent from the A510 to the connected device and somehow becomes corrupted the connected device will not receive the Xoff and will therefore continue to send data to the A510 causing the buffer of the A510 to overflow and resulting in the loss of data Robust Xon Xoff overcomes this situation by sending the Xoff character after every character received past the cutoff point of the A510 buffer Also when the A510 is receiving data it will send an Xon every 5 seconds to the connected device The behaviour of the A510 Xon Xoff flow control buffer is as follows An Xoff is issued when there are 35 bytes or less remaining in the buf
3. e e ie 5 o_______ _e CTS cep omn s a ca a DB 25 Male p ee ae se DSR 20 e C DTR PC Cable End DTE S DB 25 Female PC Cable End TE DB 9 Female User Device Cable End A510 User Manual 9 0 SPECIFICATIONS CPU Parallel Port Serial Port Flow Control Buffer LED Indicators Power Supply Dimensions Weight Operating Temp Storage Temperature 89C51 Microprocessor Centronics Parallel Select as Input or Output 36 pin Centronics female connector Asynchronous RS 232D Full duplex communication DB 25 female connector Select as DTE or DCE DIP Switch Selection Baud Rate 300 600 1200 2400 4800 bps 9600 19200 and 38400 Data Bits 7 or8 Parity None Odd or Even Stop Bits 1or2 Handshaking Software Robust Xon Xoff Hardware DTR DSR 60 byte receive buffer Power On Yellow Receive Data Green Transmit Data Green Data Error Red 9V 200mA DC Power Adapter Plug jack 5 5mm outer 2 5mm inner diameter Outer Negative A510 may be p rectly from pin 18 of the parallel connector A regulated 5V DC power supply with a current of up to 200mA is required 24mm x 73mm x 115mm 245 grams 10 to 35 C O0 to 45 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 U
4. follows DIP Switch number Switch Setting Note If you are sending the output to the serial port there is another setting available Please refer to Table 4 3 in Section 4 for this alternative setting Step 3 Connect a suitable cable between the A510 and the Output Device Power ON the Output Device and then power ON the A510 The A510 will produce a continuous output as follows 0123456789 lt gt ABCDEFGHIJKLMNOPQRSTUVWXYZ _ abcdefghijklmnopqrstuvwxyz 0123456789 lt gt ABCDEFGHIJKLMNOPQRSTUVWXYZ _ abcdefghijklmnopqrstuvwxyz 0123456789 lt gt ABCDEFGHIJKLMNOPQRSTUVWXYZ _ abcdefghijklmnopqrstuvwxyz 0123456789 lt gt ABCDEFGHIJKLMNOPQRSTUVWXYZ _ abcdefghijkimnopqrstuvwxyz 0123456789 lt gt ABCDEFGHIJKLMNOPQRSTUVWXYZ _ abcdefghijklmnopqrstuvwxyz 0123456789 lt gt ABCDEFGHIJKLMNOPQRSTUVWXYZ _ abcdefghijklmnopqrstuvwxyz 0123456789 lt gt ABCDEFGHIJKLMNOPQRSTUVWXYZ _ abcdefghijklmnopqrstuvwxyz 0123456789 lt gt ABCDEFGHIJKLMNOPQRSTUVWXYZ _ abcdefghijklmnopqrstuvwxyz 0123456789 lt gt ABCDEFGHIJKLMNOPQRSTUVWXYZ _ abcdefghijklmnopqrstuvwxyz This output will continue for as long as the A510 is powered ON To stop the continuous output simply power OFF the A510 Step 4 Turn OFF the power to the A510 and re configure it for normal use with the DIP Switch settings which you took note of in Step 1 4 0
5. NIT 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 RS 232 Serial Parallel Interface Converter Model Number A510 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
6. Por or or fon or or on on r Por or or for on on fon or ss Data Bits Stop Bits Self Test ofon o e een e ates ee Fon for on e oa No Ton for or s none No Fon for on 7 oes no A510 User Manual 5 0 5 1 5 2 INTERFACE PORT PIN ASSIGNMENTS Centronics Parallel Port Pin Signal Description Pin Signal Description 1 Data Strobe Active Low 19 Ground 2 Data Bit 1 Active High 20 Ground 3 Data Bit 2 Active High 21 Ground 4 Data Bit 3 Active High 22 Ground 5 Data Bit 4 Active High 23 Ground 6 Data Bit 5 Active High 24 Ground 7 Data Bit 6 Active High 25 Ground 8 Data Bit 7 Active High 26 Ground 9 Data Bit 8 Active High 27 Ground 10 Acknowledge Active Low 28 Ground 11 Busy Active High 29 Ground 12 Paper End Pulled Low 30 Ground 13 Select Pulled High 31 Initialize Pulled High 14 Autofeed Pulled High 32 Error Pulled High 15 NotConnected 33 Ground 16 Ground 34 Not Connected 17 Ground 35 Not Connected 18 5VDC Input 36 Ground Note a Pins are Pulled High to 5V via 4K7 resistor b Strobe amp Data lines are Pulled High to 5V via 1K resistor 1 The A510 may be powered directly from pin 18 with 5V DC at 200mA RS 232 Serial Port The RS 232 Serial Port of the A510 is factory configuired as DCE Pin Status and Usage Set for DCE Set for DTE 1 Used Ground FG FG 2 Input Output Data RD TD 3 Output Input Data TD RD 4 Not used
7. Pulled High 4K7 CTS RTS 5 Not used Pulled High 4K7 RTS CTS 6 Output Input Handshaking DTR DSR 7 Used Ground SG SG 8 Not used Pulled High 4K7 DCD DCD 20 Input Output Handshaking DSR DTR 22 Not used Pulled High 4K7 RI RI Note Pins 4 5 6 8 and 20 are pulled to the correct levels to allow a PC serial port to operate under most conditions without any additional loopback connections A510 User Manual 5 3 Factory Option RS 422 Serial Port The Serial Port of the A510 may be purchased as a factory option using part number A510 422 This model has the serial port dedicated to RS 422 and does not make use of the DTE DCE switch 5 4 RS 422 Port Pinout Pin 1 7 2 14 3 15 20 23 6 22 Note 5 5 RS 422 Cable to Other RS 422 Devices Status and Usage Signal Used Ground FG Used Ground SG Output Data TD Output Data TD Input Data RD Input Data RD Output Handshaking DTR Output Handshaking DTR Input Handshaking DSR Input Handshaking DSR Description Frame Ground Signal ground Transmit Data Transmit Data Receive Data Receive Data Data terminal ready Data terminal ready Data Set Ready Data Set Ready The Receive Data and Data Set Ready pairs are each terminated with a 120ohm resistor across the inputs Shield oe EEE E E o FG 1 6e o FG SG 7 e e _ sa A510 Cable End p 2 gt RD o H 2 i
8. User Manual ASeries A510 Interface Converter Serial Parallel ALFATRON The interfacing specialists A510 User Manual Version 6 00 August 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 the customer unauthoris
9. ed 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 Web Site www alfatron com au AUSTRALIAN MADE 1 0 2 0 A510 User Manual PRODUCT DESCRIPTION The ASeries A510 is an RS 232 Serial to Centronics Parallel protocol converter The parallel port may be set for either direction providing Serial gt Parallel or Parallel lt gt Serial interface conversion The RS 232 port may be selected as either DTE or DCE Serial RS 422 is available as a factory option The physical layout of the ASeries A510 is as follows Power Jack Serial Parallel Port Port Data Error Red Transmit Data Green J DTE DCE Selection Cm Power Yellow Receive Data Green Figure 1 A510 viewed from both ends and side INSTALLATION Before installing the A510 please make sure that all DIP Switch settings are according to your requirements It is most important to set the direction of the parallel port to either INPUT or OUTPUT as required The A510 will not operate unless the direction is set correctly Insert the power plug into the power jack socket next to the Serial connector Turn the power ON and observe the LEDs The Power LED should light up and remain alig
10. fer An Xon is issued if there are more than 45 bytes available in the buffer The Robust Xon time interval is 5 seconds this may be observed on the Transmit Data LED when the A510 is powered on 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 SG but in this case always use a separate wire for ground which is connected at both ends The shield must be connected at both ends of the cable A510 User Manual 8 0 CABLE EXAMPLES 8 1 RS 232 Cable to a PC with a DB 25 Serial Connector i ee FG 1 oi FG A510 Cable Ena 2 2 2 TD TD 3 3 RD DCE CTS 4 eo 4 RTS RTS 5 5 CTS Ce DTA 6 gt 6 DSR SG 7 7 SG DB 25 Male 7 be G DSR 20 lt lt __ 20 DTR 8 2 RS 232 Cable to a PC with a DB 9 Serial Connector Shield RD 2 ___ 3 TD A510 Cable End T a a OAE a ee oor e eo DosR sa 7 e ees5 SG DB 25 Male E ERR DSR 20 4 7 4 DTR 8 3 RS 232 Cable to other RS 232 Devices Shield oo Gvtirnn iene tenes RD 2 e AH A510 Cable End Th os ro CTS 4
11. ht all other LEDs should light up and then extinguish within 2 seconds After this sequence the A510 is ready for operation Power OFF the A510 and connect the correct cables between the A510 and the target devices Use only cables which you know to have the correct pin configurations to match the A510 to your equipment Cable requirements and pin assignments are discussed in Sections 7 and 8 WARNING AII devices must be powered OFF before connecting cables to them Incorrect cabling may cause damage to either the A510 or your equipment and is not covered by warranty If in doubt about pin configurations please have them checked by your dealer A510 User Manual 3 0 CHARACTER GENERATION FUNCTION SELF TEST The Character Generation Function in the A510 will output a continuous stream of printable ASCII characters from either the Serial or Parallel ports This function may be used to confidence test both ports of the A510 or to test the operation of other devices It is activated in the following manner Step 1 Take note of the original DIP Switch settings of the A510 then turn the power OFF Select the output port via the Parallel Port Direction switch DIP Switch 1 and set it as required Switch 1 is ON Output from SERIAL port only Switch 1 is OFF Output from both SERIAL amp PARALLEL ports Step 2 Select the Character Generation Function Self Test on the DIP by setting switch numbers 6 7 and 8 to Self Test mode as
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