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ASP Intelligent RS-485 Quick Start Manual

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Intelligent
RS-485 & RS-422
Adaptors
The Intelligent RS-485 and RS-422 Adaptors
are designed and built in Australia by:
ASP Microcomputers
14 Business Park Drive,
Notting Hill, Victoria, 3168
Australia
Telephone: (03) 9578-7600
FAX: (03) 9578-7727
email: solutions@asp.com.au
World Wide Web: http://www.asp.com.au
(ASP Microcomputers is a division of Grayline Holdings Pty. Ltd,. A.C.N. 004 940 729)
th
Manual revised: Nov 19
, 2020
Copyright © 1999-2020 by ASP Microcomputers

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Summary of Contents for ASP Intelligent RS-485

  • Page 1 Notting Hill, Victoria, 3168 Australia Telephone: (03) 9578-7600 FAX: (03) 9578-7727 email: solutions@asp.com.au World Wide Web: http://www.asp.com.au (ASP Microcomputers is a division of Grayline Holdings Pty. Ltd,. A.C.N. 004 940 729) Manual revised: Nov 19 , 2020 Copyright © 1999-2020 by ASP Microcomputers...

  • Page 3: Table Of Contents

    Contents The Intelligent RS-485 and RS-422 Adaptors ........1 Front Panel Indicators................1 RS-485 and RS-422 Cabling ..............2 Cable Termination ..................3 Power Supplies ..................4 Network Expansion ................5 The Main Cabling Points Again! ............5 Technical Information ................6 RS-232 Connector ..................6 RS-485 Connector ..................6 RS-422 Connector ..................7...

  • Page 5: The Intelligent Rs-485 And Rs-422 Adaptors

    The ZipNet and ClassNet Terminals use a master/slave protocol to communicate with the PC, with the PC being the master. The Intelligent RS-485 adaptor normally operates in receive mode, but as soon as it detects data from the PC, it switches to transmit mode, then immediately back to receive mode as soon as the PC stops sending data.

  • Page 6: Rs-485 And Rs-422 Cabling

    Networked Portable BCR WandNet ASP RS-422 and RS-485 networks must be wired using a single run of shielded twisted-pair cable, daisy chained to each unit. The cable must be looped to each unit in one continuous run - there must be no "T" or "Y"...

  • Page 7: Cable Termination

    The cable's outer shield must be continuous from one end of the cable to the other, and not connected to anything other than the ground pins at the Intelligent RS-485 and RS-422 Adaptor and each networked unit. It is vitally important that the twisted-pairs of the cable be used as pairs - do not use one wire of one pair and another wire of another pair.

  • Page 8: Power Supplies

    Intelligent RS-485 and RS-422 Adaptors Power Supplies The Intelligent RS-485 and RS-422 Adaptors require 9 to 18 volts DC at 100mA, normally supplied by a 9v DC 300mA plug pack power supply, via a centre-positive 2.5mm DC connector. The adaptors are protected from reverse polarity by a 1A series diode.

  • Page 9: Network Expansion

    Intelligent RS-485 and RS-422 Adaptors Network Expansion Provided the cabling is correctly installed and terminated, RS-422 and RS-485 networks allow a maximum total cable length of 1200 metres, and can support a maximum load of 31 units plus the RS-422 or RS- 485 adaptor per network.

  • Page 10: Technical Information

    Intelligent RS-485 and RS-422 Adaptors Technical Information This section of the manual details the pinouts of the Intelligent RS-485 and RS-422 Adaptors. RS-232 Connector The female DB-25 connector on the Intelligent RS-485 and RS-422 Adaptors is designed to plug straight into a DB-25 or DB-9 serial port on your PC, using a standard PC serial cable.

  • Page 11: Rs-422 Connector

    8 & 9 Power Supply -ve RJ-45 Connector The Intelligent RS-485 and RS-422 Adaptors also provide for the use of Category 3 or Category 5 twisted pair cable via an RJ-45 socket on the front panel. This connector is wired as follows:...

  • Page 12: Jumper Options

    Intelligent RS-485 and RS-422 Adaptors Jumper Options Internally, the Intelligent RS-485 and RS-422 Adaptors are fitted with jumpers to enable several hardware options. The photograph below shows the circuit board inside the RS-485 adaptor, and the locations of the jumpers are indicated by white circles with numbers next to them.

  • Page 13: Warranty

    ASP. Units sent freight collect will not be accepted. Freight back to you will be paid by ASP in the case of warranty repairs. ASP welcomes suggestions for improvements to our products and documentation.

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Intelligent rs-422

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