1. DL manuals
  2. Acces
  3. Computer Hardware
  4. ICOM-2S
  5. User Manual

Acces ICOM-2S User Manual

Manual is about: serial interface card

Summary of ICOM-2S

  • Page 1

    Acces i/o products inc 10623 roselle street, san diego, ca 92121 tel (858)550-9559 fax (858)550-7322 model icom-2s user manual file: micom-2s.Eb.

  • Page 3

    Iii notice the information in this document is provided for reference only. Acces does not assume any liability arising out of the application or use of the information or products described herein. This document may contain or reference information and products protected by copyrights or patents an...

  • Page 4

    Iv warranty prior to shipment, acces equipment is thoroughly inspected and tested to applicable specifications. However, should equipment failure occur, acces assures its customers that prompt service and support will be available. All equipment originally manufactured by acces which is found to be ...

  • Page 5

    V table of contents chapter 1: introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1 multipoint opto-isolated communications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1 com port compatibility . . . . . . . . . . ....

  • Page 6

    Vi list of figures figure 1-1: icom-2s block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4 figure 3-1: simplified schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1 figure 3-2: icom-2s option selec...

  • Page 7: Chapter 1:  Introduction

    1-1 manual micom-2s.Eb chapter 1: introduction the card is 10 inches long (264 mm) and should be installed in long slots of ibm pc/xt/at or compatible computers. If installed in an eight-bit slot, the high interrupts (irq 10-15) will not be available to the icom-2s. Multipoint opto-isolated communic...

  • Page 8

    Icom-2s manual 1-2 manual micom-2s.Eb auto and manual transceiver control rs485 communications requires the transmitter driver to be enabled and disabled as needed, to allow all cards to share the communications line. The icom-2s card has two methods to control the driver: automatic (auto) and reque...

  • Page 9

    1-3 manual micom-2s.Eb specifications communications interface • serial ports: two shielded male d-sub 9-pin ibm at style connectors compatible with rs422 and rs485 specifications. Serial communications ace used is type ns16550. Transceivers used are type 75176. • serial data rates: 50 to 38,400 bau...

  • Page 10

    Icom-2s manual 1-4 manual micom-2s.Eb figure 1-1: icom-2s block diagram (only one serial channel shown).

  • Page 11: Chapter 2:  Installation

    2-1 manual micom-2s.Eb chapter 2: installation the software provided with this card is contained on either one cd or multiple diskettes and must be installed onto your hard disk prior to use. To do this, perform the following steps as appropriate for your software format and operating system. Substi...

  • Page 12

    Icom-2s manual 2-2 manual micom-2s.Eb to copy the files on the master diskette to your hard disk, perform the following steps. 1. Place the master diskette into a floppy drive. 2. Change the active drive to the drive that has the diskette installed. For example, if the diskette is in drive a, type ?...

  • Page 13

    2-3 manual micom-2s.Eb samples samples for using acces32.Dll are provided in this directory. Using this dll not only makes the hardware programming easier (much easier), but also one source file can be used for both windows 95/98 and windowsnt. One executable can run under both operating systems and...

  • Page 14

    Icom-2s manual 2-4 manual micom-2s.Eb findbase.Exe dos utility to determine an available base address for isa bus , non-plug-n-play cards. Run this program once, before the hardware is installed in the computer, to determine an available address to give the card. Once the address has been determined...

  • Page 15

    2-5 manual micom-2s.Eb to install the card 1. Turn off computer power. 2. Remove the computer cover. 3. Remove the blank i/o backplate. 4. Install jumpers for selected options from either the option selection of this manual or the suggestions of our icom2set setup software program. 5. Select the bas...

  • Page 16

    3-1 manual micom-2s.Eb figure 3-1: simplified schematic chapter 3: option selection the following paragraphs describe the functions of the various jumpers on the icom-2s card. Refer to the figure 3-2, option selection map for the locations of these jumpers on the card. Cts the cts bit is used to ind...

  • Page 17

    Icom-2s manual 3-2 manual micom-2s.Eb simplex or duplex the receiver can be set in either simplex or duplex by installing jumpers marked sx or dx. Simplex mode is intended for one-way communication able to transmit or receive. Duplex mode allows transmission or reception either simultaneous or alter...

  • Page 18

    3-3 manual micom-2s.Eb switches s1=com-a address s2=com-b address (this illustration has com a at the com 3 address, and com b at com 4 address.) jumpers fdx/hdx=full/half duplex sx/dx=simplex/duplex rts=software rts option autoa, autob=auto rts option bias=rs485 bias voltage cts=forced cts signal l...

  • Page 19

    4-1 manual micom-2s.Eb chapter 4: address selection the icom-2s base address can be selected anywhere within an i/o address range 100-3f8 hex, providing that the address does not overlap with other functions. If in doubt, refer to the table below for a list of standard address assignments. (the prim...

  • Page 20

    Icom-2s manual 4-2 manual micom-2s.Eb i/o bus address switches are marked a3-a9. The following table lists switch label vs. The address line controlled and the relative weights of each. Address switch settings 1st digit 2nd digit 3rd digit switch label 7 6 5 4 3 2 1 address line controlled a9 a8 a7 ...

  • Page 21

    4-3 manual micom-2s.Eb the following table lists standard dos com port addresses. Serial com port irq base hex address address switch settings a9 a8 a7 a6 a5 a4 a3 com1 irq 4 3f8 1 1 1 1 1 1 1 com2 irq 3 2f8 1 0 1 1 1 1 1 com3 irq 4 3e8 1 1 1 1 1 0 1 com4 irq 3 2e8 1 0 1 1 1 0 1 table 4-4: standard ...

  • Page 22

    Icom-2s manual 4-4 manual micom-2s.Eb.

  • Page 23: Chapter 5:  Programming

    5-1 manual micom-2s.Eb chapter 5: programming sample programs there are sample programs provided with the icom-2s card in c, pascal, quickbasic, and several windows languages. Dos samples are located in the dos directory and windows samples are located in the win32 directory. Windows programming the...

  • Page 24

    Icom-2s manual 5-2 manual micom-2s.Eb on the icom-2s card, the clock frequency to the uart is 1.843 mhz. Below is a table for the popular divisor frequencies: baud rate divisor notes approx max cable length * 115200 1 2200 ft 57600 2 high-speed opto-couplers required 4000 ft 38400 3 maximum speed fo...

  • Page 25

    5-3 manual micom-2s.Eb the 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 initialization sequence is to set the modem control register at base address +4. This register controls functions on some cards. Bit 1 is the requ...

  • Page 26

    Icom-2s manual 5-4 manual micom-2s.Eb transmission rs485 transmission is simple to implement. The auto feature automatically enables the transmitter when data is ready to send so no software enabling procedure is needed. The following software example is for non-auto operation. First the rts line sh...

  • Page 27

    6-1 manual micom-2s.Eb chapter 6: connector pin assignments the popular 9-pin d subminiature connector is used for interfacing to communication lines. The connector is equipped with 4-40 threaded standoffs (female screw lock) to provide strain relief. Pin no. Rs422 rs485 1 rx- receive data (compleme...

  • Page 28

    A-1 manual micom-2s.Eb appendix a: application considerations introduction working with rs422 and rs485 devices is not much different from working with standard rs232 serial devices and these two standards overcome deficiencies in the rs232 standard. First, the cable length between two rs232 devices...

  • Page 29

    Icom-2s manual a-2 manual micom-2s.Eb a balanced differential line receiver senses the voltage state of the transmission line across the two signal input lines. If the differential input voltage is greater than +200 mv, the receiver will provide a specific logic state on its output. If the different...

  • Page 30

    A-3 manual micom-2s.Eb rs485 data transmission the rs485 standard allows a balanced transmission line to be shared in a party-line mode. As many as 32 driver/receiver pairs can share a two-wire party line network. Many characteristics of the drivers and receivers are the same as in the rs422 standar...

  • Page 31

    Icom-2s manual a-4 manual micom-2s.Eb.

  • Page 32: Customer Comments

    10623 roselle street, san diego ca 92121 tel. (619)550-9559 fax (619)550-7322 www.Accesioproducts.Com customer comments if you experience any problems with this manual or just want to give us some feedback, please email us at: manuals@accesioproducts.Com.. Please detail any errors you find and inclu...