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RS-422/485 Multiport Serial PCI Card

 

 

 

20

 

 

 

8.2  RS-422 (Transmitter buffer is always 
enabled) 

 

 

 

 

 

Please note that the RS-422/485 PCI Card supports 4-wire RS-422 

mode. In this mode, the data was sent and received 

independently. So you need to connect them with the 

cross-over, twisted pair cable. 

 

For the model with DB9 connectors, it also provides two 

handshaking signials RTS+/RTS-  and CTS+/CTS-  to do the 

hardware flow control. In this case, the wiring will be as follows: 

 

 

 

 
 
 
 
 
 
 

RS-422/485 PCI Card 

TXD+ 
TXD- 
 
RXD+(485)

 

RXD-(485) 

TX+ 
TX- 
 
RX+ 
RX- 

4-wire twisted pair cable 

RS-422/485 PCI Card 

RS-422 Device 

 

TXD+ 
TXD- 
RXD+ 
RXD- 
RTS+ 
RTS- 
CTS+ 
CTS-

 

RS-422 Device 

TXD+ 
TXD- 
RXD+ 
RXD- 
RTS+ 
RTS- 
CTS+ 
CTS-

 

Содержание MSC-102B

Страница 1: ...MSC 102B MSC 102B SI Installation Guide ...

Страница 2: ...lock Speed Selector 7 3 2 2 JP1 RS 422 485 Mode Selector 7 3 2 3 S1 S2 Terminal Block Connectors Pin Assignments 8 3 2 4 S1 S2 Terminator Settings 8 4 Installing the RS 422 485 PCI Card 10 5 Installing Drivers 11 5 1 Windows 98 ME 2000 XP 2003 11 5 2 Windows NT 4 0 12 6 Set RS 485 in 2 wire Half Duplex Mode 13 6 1 Windows 2000 XP 14 6 2 Windows 98 ME 15 7 Set High Baud Rate 16 7 1 Windows 2000 XP ...

Страница 3: ...tures Fully PCI Bus Specifications 2 2 and Power Management 1 0 compliant 128 byte on chip FIFO and arbitrary trigger levels and interrupts and automatic hardware software flow control Up to 921 6 Kbps baud rate over 700 Kbps data throughput 5 6 7 8 9 bits data framing Precise RS 485 ATTATM Auto Transceiver Turn Around feature to disable the line driver by hardware Supports echo mode to help softw...

Страница 4: ...RS 422 485 multiport serial PCI card to your computer please make sure the following accessories are well packed in the box Multiport serial PCI Card x 1 Optional Octopus Cable only for 4 port and 8 port models Driver CD 1 Installation Guide 1 Mark the check box to help you check it ...

Страница 5: ...2 Terminator Enable Disable JP1 RS 422 485 Mode Selector JP5 UART Clock Speed Selector UART Input Clock Speed 1 8432MHZ the maximum baud rate is 115 2Kbps Default HI LOW UART Input Clock Speed 14 7456MHZ the maximum baud rate is 926 1Kbps In this setting you need go to Windows COM port Properties to detect this input clock automatically and fit this clock value see the software setup for more deta...

Страница 6: ...fault No echo data LOOP NO_LOOP LOOP RTS will be connected to CTS NO_LOOP Default RTS and CTS operate normally Please note that if the mode were set at 422 mode the other settings AUTO ECHO and LOOP settings will take no effect The Echo mode is useful for the application program to detect if the RS 485 bus were in a collision If the echoed data was not equal to the transmitted data then the bus wa...

Страница 7: ...rmination Resistor Setting JP7 TXD IN TXD Terminator Enabled OUT Default TXD Terminator Disabled JP7 RXD IN Default RXD Terminator Enabled OUT RXD Terminator Disabled JP7 RTS IN RTS Terminator Enabled OUT Default RTS Terminator Disabled JP7 CTS IN Default CTS Terminator Enabled OUT CTS Terminator Disabled 1 5 6 9 9 Pins Signal 1 TXD DATA 2 TXD DATA 3 RXD 4 RXD 5 GND 6 RTS 7 RTS 8 CTS 9 CTS TXD Ter...

Страница 8: ...bled JP8 RXD IN Default RXD Terminator Enabled OUT RXD Terminator Disabled JP8 RTS IN RTS Terminator Enabled OUT Default RTS Terminator Disabled JP8 CTS IN Default CTS Terminator Enabled OUT CTS Terminator Disabled Note IN Jumper Installed OUT Jumper Not Installed 3 2 2S with Terminal Block Connectors J2 S1 JP7 S1 Terminator Enable Disable J3 S2 JP8 S2 Terminator Enable Disable JP1 RS 422 485 Mode...

Страница 9: ...ter Buffer Enable is Controlled by RTS active high AUTO Default RS 485 Transmitter Buffer is controlled automatically by ATTATM hardware circuit 422 AUTO NO_ECHO NO_LOOP 485 RTS ECHO LOOP HI LOW UART Input Clock Speed 14 7456MHZ the maximum baud rate is 926 1Kbps In this setting you need go to Windows COM port Properties to detect this input clock automatically and fit this clock value see the sof...

Страница 10: ...the RS 485 bus were in a collision If the echoed data was not equal to the transmitted data then the bus was in a collision If you want to set the RS 485 transceiver to AUTO mode you have to go to Windows Device Manager to turn on this option as well You only need to do it once and the Windows will keep the settings afterward Please note that S1 and S2 have its own setting You need to go to each p...

Страница 11: ... JP7 RXD IN Default RXD Terminator Enabled OUT RXD Terminator Disabled Note IN Jumper Installed OUT Jumper Not Installed S2 Terminator Settings JP8 Jumper Name Jumper Settings Termination Resistor Setting JP8 TXD IN TXD Terminator Enabled OUT Default TXD Terminator Disabled JP8 RXD IN Default RXD Terminator Enabled OUT RXD Terminator Disabled Note IN Jumper Installed OUT Jumper Not Installed ...

Страница 12: ...er chassis 5 Plug the RS 422 485 PCI card to the unused PCI expansion slot and attached the I O card bracket to the computer chassis screw 6 If your card s connectors are terminal blocks please install the terminal blocks from the outside of the computer Since the terminal blocks are bigger than the rear PCI panel you need install the card first then the terminal block connectors 7 Put the chassis...

Страница 13: ...cation 5 1 Windows 98 ME 2000 XP 2003 When Windows start up OS will display Found New Hardware Wizard Click Next to continue 1 Insert Driver CD into the CD DVD ROM drive for example D select Search for a suitable driver for my device Recommended and click Next 2 Select Specify a location then click Next to continue click Browse to specify the driver s location D IO OXFORD 3 Click Next to continue ...

Страница 14: ...ultiport Serial PCI Card 12 5 2 Windows NT 4 0 Since the Windows NT is not plug and play you need to double click the following icon in the D IO OXFORD WinNT4 folder or run the Install_serial exe in the same folder ...

Страница 15: ...ow the following steps 1 Set the Mode Jumpers JP1 to 485 and AUTO as mentioned in the above sections 2 Proceed with the following settings in Windows Right click on My Computer and choose properties Win98 ME or Manage Win2000 XP Choose Device Manager and double click Ports You will see the PCI Communications Port COM3 COM4 provided by your card ...

Страница 16: ...ort COM3 or PCI Communications Port COM4 then select Settings 6 1 Windows 2000 XP Go the the COM3 s properties and set the mode to RS422 485 Choose RS485 buffer enable to Active High Set the other port e g COM4 by the same procedures mentioned Set RS422 485 and Active High for ...

Страница 17: ...his examples if the first port is COM5 and the second port is COM6 go to the COM5 s properties and select RS485 Buf En Active high for the DTR function Repeat the mentioned procedures to set the other port e g COM6 Select RS485 Buf_En Active high for DTR function ...

Страница 18: ... to HI Go to the COM port s settings of Windows Device Manager to let it detect the clock speed automatically 7 1 Windows 2000 XP Set the JP5 to HI In the Windows COM port properties as the following figure select Data rate and click on Detect Crystal Frequency The Crystal Frequency settings will be set to 14 7456MHZ then click OK The settings will be saved by Windows You don t need to configure i...

Страница 19: ...indows COM port properties as the following figure select Data rate and click on Automatic Crystal Detection The Crystal Frequency settings will be set to 14 7456MHZ then click OK The settings will be saved by Windows You don t need to configure it again whenever you restart the system ...

Страница 20: ...RS 422 485 Multiport Serial PCI Card 18 ...

Страница 21: ...pports optional auto echo mode If enabled when the data was sent to the RS 485 transmitter the exact data will be sent back to its receiver simultaneously The application program can use the echoed data to check if the RS 485 bus was currently in collission condition and need to be resent TXD 485 TXD 485 DATA DATA 2 wire twisted pair cable RS 422 485 PCI Card RS 485 Device ...

Страница 22: ...need to connect them with the cross over twisted pair cable For the model with DB9 connectors it also provides two handshaking signials RTS RTS and CTS CTS to do the hardware flow control In this case the wiring will be as follows RS 422 485 PCI Card TXD TXD RXD 485 RXD 485 TX TX RX RX 4 wire twisted pair cable RS 422 485 PCI Card RS 422 Device TXD TXD RXD RXD RTS RTS CTS CTS RS 422 Device TXD TXD...

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