Acess ICOM-2S Manual do Utilizador Página 1

ACCES I/O PRODUCTS INC10623 Roselle Street, San Diego, CA 92121TEL (858)550-9559 FAX (858)550-7322MODEL ICOM-2SUSER MANUALFILE: MICOM-2S.Eb

ICOM-2S Manual1-4Manual MICOM-2S.EbFigure 1-1: ICOM-2S Block Diagram(Only one serial channel shown)

2-1Manual MICOM-2S.EbChapter 2: Installation The software provided with this card is contained on either one CD or multiple diskettes and must beins

ICOM-2S Manual2-2Manual MICOM-2S.EbTo copy the files on the master diskette to your hard disk, perform the following steps.1. Place the master diskett

2-3Manual MICOM-2S.EbSAMPLESSamples for using ACCES32.DLL are provided in this directory. Using this DLL not only makesthe hardware programming easie

ICOM-2S Manual2-4Manual MICOM-2S.EbFindbase.exeDOS utility to determine an available base address for ISA bus , non-Plug-n-Play cards. Run thisprogra

2-5Manual MICOM-2S.EbTo Install the Card1. Turn off computer power.2. Remove the computer cover.3. Remove the blank I/O backplate.4. Install jumpers f

3-1Manual MICOM-2S.EbFigure 3-1: Simplified SchematicChapter 3: Option SelectionThe following paragraphs describe the functions of the various jumpe

ICOM-2S Manual3-2Manual MICOM-2S.EbSimplex or DuplexThe receiver can be set in either Simplex or Duplex by installing jumpers marked SX or DX. Simple

3-3Manual MICOM-2S.EbSwitchesS1=COM-A AddressS2=COM-B Address(This illustration has COM A at the COM 3address, and COM B at COM 4 address.)JumpersFDX

4-1Manual MICOM-2S.EbChapter 4: Address SelectionThe ICOM-2S base address can be selected anywhere within an I/O address range 100-3F8 hex,providing

ICOM-2S Manual4-2Manual MICOM-2S.EbI/O bus address switches are marked A3-A9. The following table lists switch label vs. the address linecontrolled a

4-3Manual MICOM-2S.EbThe following table lists standard DOS COM port addresses.SerialCOM PortIRQBase HexAddressAddress Switch SettingsA9 A8 A7

ICOM-2S Manual4-4Manual MICOM-2S.Eb

5-1Manual MICOM-2S.EbChapter 5: ProgrammingSample ProgramsThere are sample programs provided with the ICOM-2S card in C, Pascal, QuickBASIC, and seve

ICOM-2S Manual5-2Manual MICOM-2S.EbOn the ICOM-2S card, the clock frequency to the UART is 1.843 MHz. Below is a table for thepopular divisor frequen

5-3Manual MICOM-2S.EbThe C command to set the UART for an 8-bit word, no parity, and one stop bit is:outportb(BASEADDR +3, 0x03)The third step of the

ICOM-2S Manual5-4Manual MICOM-2S.EbTransmissionRS485 transmission is simple to implement. The AUTO feature automatically enables the transmitterwhen

6-1Manual MICOM-2S.EbChapter 6: Connector Pin AssignmentsThe popular 9-pin D subminiature connector is used for interfacing to communication lines.

A-1Manual MICOM-2S.EbAppendix A: Application ConsiderationsIntroductionWorking with RS422 and RS485 devices is not much different from working with

ICOM-2S ManualA-2Manual MICOM-2S.EbA balanced differential line receiver senses the voltage state of the transmission line across the twosignal input

iiiNoticeThe information in this document is provided for reference only. ACCES does not assume any liability arisingout of the application or use of

A-3Manual MICOM-2S.EbRS485 Data TransmissionThe RS485 Standard allows a balanced transmission line to be shared in a party-line mode. As manyas 32 dr

ICOM-2S ManualA-4Manual MICOM-2S.Eb

10623 Roselle Street, San Diego CA 92121Tel. (619)550-9559 FAX (619)550-7322www.accesioproducts.comCustomer CommentsIf you experience any problems w

ivWarrantyPrior to shipment, ACCES equipment is thoroughly inspected and tested to applicable specifications. However,should equipment failure occur,

vTable of ContentsChapter 1: Introduction ... 1-1Multipoint Opto-isolated Communications ...

viList of FiguresFigure 1-1: ICOM-2S Block Diagram ... 1-4Figure 3-1: Simplified Schematic ...

1-1Manual MICOM-2S.EbChapter 1: IntroductionThe card is 10 inches long (264 mm) and should be installed in long slots of IBM PC/XT/AT orcompatible c

ICOM-2S Manual1-2Manual MICOM-2S.EbAuto and Manual Transceiver ControlRS485 communications requires the transmitter driver to be enabled and disabled

1-3Manual MICOM-2S.EbSpecificationsCommunications Interface• Serial Ports: Two shielded male D-sub 9-pin IBM AT style connectorscompatible with RS422