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22 

 
         © Sealevel Systems, Inc. 

7101 Manual   |  SL9160  9/2021 

 

Appendix C 

–

 Electrical Interface 

RS-232 

Quite possibly the most widely used communication standard is RS-232. This implementation has been 
defined and revised several times and is often referred to as RS-232 or EIA/TIA-232. The IBM PC computer 
defined  the  RS-232  port  on  a  9  pin  D  sub  connector  and  subsequently  the  EIA/TIA  approved  this 
implementation as the EIA/TIA-574 standard. This standard is defined as the 

9-Position Non-Synchronous 

Interface between Data Terminal Equipment and Data Circuit-Terminating Equipment Employing Serial Binary 
Data Interchange

. Both implementations are in widespread use and will be referred to as RS-232 in this 

document. RS-232 is capable of operating at data rates up to 20 Kbps at distances less than 50 ft. The 
absolute maximum data rate may vary due to line conditions and cable lengths. RS-232 is a single ended 
or unbalanced interface, meaning that a single electrical signal is compared to a common signal (ground) 
to determine binary logic states. The RS-232 and the EIA/TIA-574 specification define two types of interface 
circuits, Data Terminal Equipment (DTE) and Data Circuit-Terminating Equipment (DCE). The IC485+ is a 
DCE device.   

RS-422 

The RS-422 specification defines the electrical characteristics of balanced voltage digital interface circuits. 
RS-422 is a differential interface that defines voltage levels and driver/receiver electrical specifications. On 
a differential interface, logic levels are defined by the difference in voltage between a pair of outputs or 
inputs. In contrast, a single ended interface, for example RS-232, defines the logic levels as the difference 
in voltage between a single signal and a common ground connection. Differential interfaces are typically 
more immune to noise or voltage spikes that may occur on the communication lines. Differential interfaces 
also have greater drive capabilities that allow for longer cable lengths. RS-422 is rated up to 10 Megabits 
per  second  and  can  have  cabling  4000  feet  long.  RS-422  also  defines  driver  and  receiver  electrical 
characteristics that will allow 1 driver and up to 32 receivers on the line at once. RS-422 signal levels range 
from 0 to +5 volts. RS-422 does not define a physical connector.  

 

 

 

Содержание ULTRA 530.PCI

Страница 1: ...1 Sealevel Systems Inc 7101 Manual SL9160 9 2021 ULTRA 530 PCI User Manual 7101...

Страница 2: ...T STARTED 4 CARD SETUP 5 INSTALLATION 14 TECHNICAL DESCRIPTION 16 SPECIFICATIONS 19 APPENDIX A TROUBLESHOOTING 20 APPENDIX B HOW TO GET ASSISTANCE 21 APPENDIX C ELECTRICAL INTERFACE 22 APPENDIX D ASYN...

Страница 3: ...rements Choose the RS 422 mode for long distance device connections up to 4000ft where noise immunity and high data integrity are essential Select RS 485 and capture data from multiple peripherals in...

Страница 4: ...Warning The highest level of importance used to stress a condition where damage could result to the product or the user could suffer serious injury Important The middle level of importance used to hig...

Страница 5: ...er circuit The selections are Auto enable silk screen AT The Auto enable feature automatically enables disables the RS 485 interface via on board circuitry RTS enable silk screen RT The RTS mode uses...

Страница 6: ...L9160 9 2021 CARD SETUP CONTINUED RS 485 Mode Examples Header E4 AT RT DT OP NE Figure 1 Header E4 RS 422 AT RT DT OP NE Figure 2 Header E4 RS 485 Auto Enabled with No Echo AT RT DT OP NE Figure 3 Hea...

Страница 7: ...RT DT OP NE Figure 5 Header E4 RS 485 RTS Enabled with Echo AT RT DT OP NE Figure 6 Header E4 RS 485 DTR Enabled with No Echo Address and IRQ selection The ULTRA 530 PCI is automatically assigned I O...

Страница 8: ...ds to a specific portion of the interface If multiple ULTRA 530 PCI adapters are configured in a RS 485 network only the boards on each end should have jumpers T P P ON Refer to the following table fo...

Страница 9: ...has the ability to be used in either RS 232 or RS 422 485 This is selectable via four 24 pin DIP shunts at E1 E4 Please use the following illustration to aid in the configuration of your electrical i...

Страница 10: ...clocking modes These modes are selected at Header E8 To select the Baud rates commonly associated with COM ports i e 2400 4800 9600 19 2 115 2K Bps place the jumper in the divide by 4 mode silk screen...

Страница 11: ...Data Rate 1200 bps 300 bps 2400 bps 600 bps 4800 bps 1200 bps 9600 bps 2400 bps 19 2K bps 4800 bps 57 6 K bps 14 4K bps 115 2 K bps 28 8K bps 230 4K bps 57 6 K bps 460 8K bps 115 2 K bps If your commu...

Страница 12: ...discussion on isochronous clocking refer to the Technical Description section The three headers that allow the selection of either a modem control signal or the clock option are E5 E6 and E7 The follo...

Страница 13: ...SETUP CONTINUED Isochronous Clocking Jumpers continued RI TXC Figure 15 Header E6 Clock Signal TXC selected as input TSET DTR Figure 16 Header E7 Modem Control Signal DTR selected as output TSET DTR F...

Страница 14: ...OM program folder listed You are now ready to proceed with connecting the 7101 to your system Refer to the Hardware Installation section for details Windows NT is not USB aware and thus cannot support...

Страница 15: ...he Adapter in the machine until the software has been fully installed 1 Turn off PC power Disconnect the power cord 2 Remove the PC case cover 3 Locate an available PCI slot and remove the blank metal...

Страница 16: ...e majority of the serial buses in use today operate asynchronously that is not synchronous or more literally not clocked The same dictionary defines isochronous as uniform in time having equal duratio...

Страница 17: ...de GND Ground 7 RD Receive Data 3 Input CTS Clear To Send 5 Input DSR Data Set Ready 6 Input TXC Transmit Clock 15 Input RXC Receive Clock 17 Input DCD Data Carrier Detect 8 Input RI Ring Indicator 22...

Страница 18: ...2 Output RTSB RTS Request to Send Positive 19 Output RTSA RTS Request to Send Negative 4 Output DTRB DTR Data Terminal Ready Positive 23 Output DTRA DTR Data Terminal Ready Negative 20 Output TXCB TX...

Страница 19: ...nsing Manufacturing All Sealevel Systems Printed Circuit boards are built to UL 94V0 rating and are 100 electrically tested These printed circuit boards are solder mask over bare copper or solder mask...

Страница 20: ...here is no conflict with currently installed adapters No two adapters can occupy the same I O address 3 Make sure the Sealevel Systems adapter is using a unique IRQ While the Sealevel Systems adapter...

Страница 21: ...ides an FAQ section on its web site Please refer to this to answer many common questions This section can be found at http www sealevel com faq asp Sealevel Systems maintains a web page on the Interne...

Страница 22: ...ic states The RS 232 and the EIA TIA 574 specification define two types of interface circuits Data Terminal Equipment DTE and Data Circuit Terminating Equipment DCE The IC485 is a DCE device RS 422 Th...

Страница 23: ...ay be active at a time and the other driver s must be tri stated RS 485 can be cabled in two ways two wire and four wire mode Two wire mode does not allow for full duplex communication and requires th...

Страница 24: ...of the character is defined by the transmission of a pre defined number of stop bits usually 1 1 5 or 2 An extra bit used for error detection is often appended before the stop bits Asynchronous Commu...

Страница 25: ...25 Sealevel Systems Inc 7101 Manual SL9160 9 2021 Appendix E Silk Screen 3 5 3 175 3 5 4 9 3 175...

Страница 26: ...to correct the interference at the user s expense EMC Directive Statement Products bearing the CE Label fulfill the requirements of the EMC directive 89 336 EEC and of the low voltage directive 73 23...

Страница 27: ...ty Warranty service may be obtained by delivering the Product to Sealevel and providing proof of purchase Customer agrees to ensure the Product or assume the risk of loss or damage in transit to prepa...

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