IC975C-LP Users Manual
Contents
1. lt BLACK BOX NETWORK SERVICES IC975C LP Users Manual CUSTOMER Order toll free in the U S 24 hours 7 A M Monday to Midnight Friday 877 877 BBOX SUPPORT FREE technical support 24 hours a day 7 days a week Call 724 746 5500 or fax 724 746 0746 INFORMATION Mail order Black Box Corporation 1000 Park Drive Lawrence PA 15055 1018 Web site www blackbox com Contents 010117 scosse RAE 1 WHAT SSINGLUDED 1 Card SCUUD ius sick vinivenssauspncvancacesssnusdicvarcuseDnsanbuvasecuipsaeesbesuuedh D RS 4853BNABLE 2 RS 485 MODE EXAMPLES HEADER 5 3 ADDRESS AND IRQ SELECTION 4 LINE TERMINATION eo SR RRA Bee REA ee 4 Figure 7 Header E4 Line Termination ELECTRICAL INTERFACE SEEECTION cece che tS oe tee Roh we he Re aR cS 5 CLOCK MODES 6 6 BAUD RATES AND DIVISORS FOR THE DIV1 7 ISOGHRONOUS CLOCKING JUMPERS iti cea sneer ioe 7 OPERATING SYSTEM2. 721 inches 11 99 cm Board Height including Goldfingers _ 2 536 inches 6 44 cm Board Height excluding Goldfingers 2 211 inches 5 62 cm 12 Appendix Troubleshooting Appendix A Troubleshooting Black Box Software is supplied with the Black Box adapter and may be used in the troubleshooting procedures Using this software and following these simple steps can eliminate most common problems without the need to call Technical Support 1 Identify all I O adapters currently installed in your system This includes your on board serial ports controller cards sound cards etc The I O addresses used by these adapters as well as the IRQ if any should be identified 2 Configure your Black Box adapter so that there is no conflict with currently installed adapters No two adapters can occupy the same I O address 3 Make sure the Black Box adapter is using a unique IRQ While the Black Box adapter does allow the sharing of IRQs many other adapters i e SCSI adapters amp on board serial ports do not The IRQ is typically selected by the BIOS or Operating system Some BIOS setup software will allow changing the IRQ but others do not Another method of changing assigned resources is to try changing PCI slots This will typically cause the BIOS or OS to reassign the resources 4 Make sure the Black Box adapter is securely installed in a motherboard slot 5 When running DOS or Windows 3 x refer to the supplied Black Box Softw
3. around an 8250 Universal Asynchronous Receiver Transmitter UART This device allows asynchronous serial data to be transferred through a simple and straightforward programming interface A start bit followed by a pre defined number of data bits 5 6 7 or 8 defines character boundaries for asynchronous communications The end 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 Idle state of Odd Even Bits 4 ly 4 Te Gee eed eee lsr ISP ee 0 K 15 This special bit is called the parity bit Parity is a simple method of determining if a data bit has been lost or corrupted during transmission There are several methods for implementing a parity check to guard against data corruption Common methods are called E ven Parity or O dd Parity Sometimes parity is not used to detect errors on the data stream This is refereed to as N o parity Because each bit in asynchronous communications is sent consecutively it is easy to generalize asynchronous communications by stating that each character is wrapped framed by pre defined bits to mark the beginning and end of the serial transmission of the character The data rate and communication parameters for asynchronous communications have
4. the software will automatically launch Otherwise point your browser to the Index htm on the root directory of the CD 4 Select Install Software 5 Select the Part Number for your adapter from the listing 6 Select Windows 98 ME 2000 XP The setup file will automatically detect the operating environment and install the proper components Next depending on the OS version select the Run this program from its current location or Open option Follow the information presented on the screens that follow 7 screen may appear with the declaration The publisher cannot be determined due to the problems below Authenticode signature not found Please select the Yes button and proceed with the installation This declaration simply means that the Operating System is not aware of the driver being loaded It will not cause any harm to your system 8 During setup the user may specify installation directories and other preferred configurations This program also adds entries to the system registry that are necessary for specifying the operating parameters for each driver An uninstall option is also included to remove all registry INI file entries from the system Linux Refer to D software seacom Other Linux Linux serial readme where D your CDROM driver letter found on the Black Box CD This file contains valuable information on installing your adapter in the various Linux releases Also in this sub direc
5. 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 RS 485 RS 485 is backwardly compatible with RS 422 however it is optimized for partyline or multi drop applications The output of the RS 422 485 driver is capable of being Active enabled or Tri State disabled This capability allows multiple ports to be connected in a multi drop bus and selectively polled RS 485 allows cable lengths up to 4000 feet and data rates up to 10 Megabits per second The signal levels for RS 485 are the same as those defined by RS 422 RS 485 has electrical characteristics that allow for 32 drivers and 32 receivers to be connected to one line This interface is ideal for multi drop or network environments RS 485 tri state driver not dual state will allow the electrical presence of the driver to be removed from the line Only one driver may 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 that data be transferred in
6. 2 422 485 530 serial port supporting asynchronous data rates up to 460 8K bps as well as isochronous data rates up to the speed of the supplied clock Now with this card you can use your standard communications software and connect over a clocked digital communications line Configure the port as RS 232 for standard serial COM port requirements 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 a RS 485 multi drop network Up to 31 RS 485 devices can be connected to each port to automate your data collection In both RS 232 and RS 422 modes the card works seamlessly with the standard operating system serial driver In RS 485 mode our special auto enable feature allows the RS 485 ports to be viewed by the operating system as a COM port This allows the standard COM driver to be utilized for RS 485 communications Our on board hardware automatically handles the RS 485 driver enable What s Included The IC975C LP is shipped with the following items If any of these items are missing or damaged contact the supplier e 1C975C LPI Serial I O Adapter e Black Box SeaCOM Software CD e Standard Profile PCI Bracket Card Setup Card Setup RS 485 Enable Modes RS 485 is ideal for multi drop or network environments RS 485 requires a tri state driver that will allow the electrical presence of the drive
7. Header E5 RS 485 RTS Enabled with No Echo Card Setup AT RT DT OP Figure 5 Header E5 RS 485 RTS Enabled with Echo AT RT DT OP NE Figure 6 Header E5 RS 485 DTR Enabled with No Echo Address and IRQ selection The IC975C LP is automatically assigned I O addresses and IRQs by your motherboard BIOS Only the I O address may be modified by the user Adding or removing other hardware may change the assignment of I O addresses and IRQs Line Termination Typically each end of the RS 485 bus must have line terminating resistors RS 422 terminates at the receive end only 120 ohm resistor is across each RS 422 485 data input in addition to a 1K ohm pull up pull down combination that biases the receiver inputs Header E4 allows customization of this interface to specific requirements Each jumper position corresponds to a specific portion of the interface If multiple IC975C LP adapters are configured in an RS 485 network only the boards on each end should have jumpers T P amp P ON Refer to the following table for each position s operation Adds or removes the 1K ohm pull down resistor in the RS 422 RS 485 receiver circuit Adds or removes the 1K ohm pull up resistor in the RS 422 RS 485 receiver circuit Adds or removes
8. INSTALLATION 8 WINDOWS 95 98 ME NT 2000 X Pi cea vende Lessee be Sand cbt 8 TSOCHRONOUS COMMUNICATIONS sccessseesseceeseeesseceeeeeesaeceeeeesaeceeeeecsaeceeeceaaecseeeeaaeceeeeeaseceereeenaeceaes 10 CONNECTOR PIN ASSIGNMENTS 10 RS 232 Signals DB25 Male Sues eaten Lett hee 10 RS 422 485 530 Pin Assignments DB25 Male 11 LD ENVIRONMENTAL SPECIFICATIONS 12 MANUFACTURING eo hee 12 POWER CONSUMPTION Race ee eee XS 12 PHYSICAL DIMENSIONS sincier E 12 Appendix A Troubleshooting eesssesoeseessoesoossessoesoossessoesoossoesoesooesoesoesooessessossoossessoseoessessee 13 Appendix B Electrical InterfaCe esseeseescoesoesoessoesoesoesooesoesoeseossocesossooesossossooesossoessossessee 14 Appendix Asynchronous Communications 15 Appendix D Sulk Screen esiisa O Appendix E Compliance Notices 17 FEDERAL COMMUNICATIONS COMMISSION STATEMENT cccccccssesesesssessseseseseseseseseeeseseseseseseseseseseseeees 17 EMC DIRECTIVE STATEMEN 17 Revision December 9 2003 Introduction Introduction Overview The Black Box IC975C LP is a one channel PCI Bus serial I O adapter for the PC and compatibles It provides one field selectable RS 23
9. are and this User Manual to verify that the Black Box adapter is configured correctly This software contains a diagnostic program SSD D software seacom Other DOS DIAG where D the driver letter of your CDROM drive will verify if an adapter is configured properly This diagnostic program is written with the user in mind and is easy to use You can use D software seacom Other DOS PCI FindPCl exe to determine resources that have been assigned to your adapter Make sure that if available the Use Plug n Play option is turned OFF in your BIOS Having this option set to ON in DOS or Windows 3 x will cause erratic operations 6 For Windows95 98 ME NT 2000 the diagnostic tool WinSSD is installed in the SeaCOM folder on the Start Menu during the setup process First find the ports using the Device Manager then use WinSSD to verify that the ports are functional 7 Remember that a loopback test is not possible with the NE switch turned 8 Always use the Black Box diagnostic software when troubleshooting a problem This will eliminate any software issues from the equation 13 Appendix Electrical Interface Appendix B 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 conne
10. assignments meet EIA TIA ANSI 232E DTE Technical Note Please terminate any control signals that are not going to be used The most common way to do this is connect RTS to CTS and RI Also connect DCD to DTR and DSR Terminating these pins if not used will help insure you get the best performance from your adapter 10 Technical Description RS 422 485 530 Pin Assignments DB25 Male Signal Name Mode PGND DSR _ Data Set Ready Negative 6 Input DCDA_ DCD__ Data Carrier Detect Negative 8 Input EA Receive Clock Positive Receive Clock Negative TSETB TSET Terminal Timing Positive Note These assignments meet the EIA TIA ANSI 530 DTE specification with the exception of Ring Indicator which is not specified It has been included here for compatibility with systems requiring Ring Indicator TSETA TSET Terminal Timing Negative 11 Specifications Specifications Environmental Specifications Temperature 0 to 70 C 50 to 105 Range 32 to 158 F 58 to 221 F Humidity Range 10 to 90 R H 10 to 90 R H Non Condensing Non Condensing Manufacturing All Black Box 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 over tin nickel Power Consumption Supply line 12VDC 12VDC 5 VDC 480 mA Physical Dimensions Board length 4
11. ctor and subsequently the EIA TIA approved this implementation as the 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 wide spread 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 IC975C LP is a DTE 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
12. d with the Oxford Semiconductor 16C950 RS 485 enable feature Output One enable silk screen OP This mode uses the control signal to enable the RS 485 interface and provides backward compatibility with existing software products and with the Exar 16C850 RS 485 enable feature No Echo silk screen NE of 5 is used to control the RS 485 enable disable functions for the receiver circuit and determine the state of the RS 422 485 driver The RS 485 Echo is the result of connecting the receiver inputs to the transmitter outputs Every time a character is transmitted it is also received This can be beneficial if the software can handle echoing i e using received characters to throttle the transmitter or it can confuse the system if the software does not To select the No Echo mode select silk screen position NE Card Setup RS 485 Mode Examples Header E5 RT DT OP NE CE Figure l Header E5 RS 422 DT OP NE i Figure 2 Header E5 RS 485 Auto Enabled with No Echo RT DT OP O Figure 3 Header E5 RS 485 Auto Enabled with Echo AT RT DT OP NE Figure 4
13. mful interference to radio communications Operation of this equipment in a residential area is likely to cause harmful interference in such case the user will be required to correct the interference at the users expense EMC Directive Statement Products bearing the CE Label fulfill the requirements of EMC directive 89 336 EEC and of the low voltage directive 73 23 EEC issued by the European Commission To obey these directives the following European standards must be met EN55022 Class A Limits and methods of measurement of radio interference characteristics of information technology equipment EN55024 Information technology equipment Immunity characteristics Limits and methods of measurement EN60950 IEC950 Safety of information technology equipment including electrical business equipment Warning This is a Class A Product In a domestic environment this product may cause radio interference in which case the user may be required to take adequate measures to prevent or correct the interference Always use cabling provided with this product if possible If no cable is provided or if an alternate cable is required use high quality shielded cabling to maintain compliance with FCC EMC directives 17
14. only one direction at a time For half duplex operation the two transmit pins should be connected to the two receive pins Tx to Rx and Tx to Rx Four wire mode allows full duplex data transfers RS 485 does not define a connector pin out or a set of modem control signals RS 485 does not define a physical connector RS 530 RS 530 a k a EI A 530 compatibility means that RS 422 signal levels are met and the pin out for DB 25 connector is specified The EIA Electronic Industry Association created the RS 530 specification to detail the pin out and define a full set of modem control signals that can be used for regulating flow control and line status The RS 530 specification defines two types of interface circuits Data Terminal Equipment DTE and Data Circuit Terminating Equipment DCE The Black Box adapter is a DTE interface 14 Appendix Asynchronous Communications Appendix C Asynchronous Communications Serial data communications implies that individual bits of a character are transmitted consecutively to a receiver that assembles the bits back into a character Data rate error checking handshaking and character framing start stop bits are pre defined and must correspond at both the transmitting and receiving ends Asynchronous communications is the standard means of serial data communication for PC compatibles and PS 2 computers The original PC was equipped with a communication or COM port that was designed
15. r to be removed from the line The driver is in a tri state or high impedance condition when this occurs Only one driver may be active at a time and the other driver s must be tri stated The output modem control signal Request To Send RTS is typically used to control the state of the driver Some communication software packages refer to RS 485 as RTS enable or RTS block mode transfer One of the unique features of the IC975C LP is the ability to RS 485 compatible without the need for special software or drivers This ability is especially useful in Windows Windows NT and OS 2 environments where the lower level I O control is abstracted from the application program This ability means that the user can effectively use the IC975C LP in a RS 485 application with existing i e standard RS 232 software drivers Header ES is used to control the RS 485 mode functions for the driver 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 the RTS modem control signal to enable the RS 485 interface and provides backward compatibility with existing software products DTR enable silk screen DT The DTR mode uses the DTR modem control signal to enable the RS 485 interface provides backward compatibility with existing software products an
16. s RS 232 for modems printers and plotters as well as RS 422 485 530 for industrial automation and control applications The IC975C LP utilizes the 16850 UART This chip features programmable baud rates data format interrupt control and a 128 byte input and output FIFO The IC975C LP also supports the Oxford Semiconductor 16C950 This chip features the same FIFO and automatic RS 485 driver enable capabilities as the 16C850 and the ability to receive a clock for isochronous communications Isochronous Communications Webster s New Collegiate Dictionary defines synchronous as recurring or operating at exactly the same period The 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 duration and recurring at regular intervals In this implementation of serial communications isochronous is defined as asynchronous framing i e start stop and parity bits with the addition of a clock signal This scheme allows for much higher data rates and the use of digital lines i e ISDN T1 where a clock is supplied for data multiplexing Connector Pin Assignments RS 232 Signals DB25 Male GND Ground Data Set Ready mu i Data Carrier Detect 8 Requestto Send ReceiveClock PD R TS DSR XC RXC DCD I D TS TR Note These
17. the 120 ohm termination Connects the TX to RX for RS 485 two wire operation Connects the TX to RX for RS 485 two wire operation Card Setup Figure 7 Header 4 Line Termination Electrical Interface Selection Each port on IC975C LP has the ability to be used in either RS 232 or RS 422 485 This is selectable via two 24 pin DIP shunts at Eland E2 Please use the following illustration to aid in the configuration of your electrical interface El RS 422 RS 232 E2 Figure 8 Headers El amp E2 RS 232 Selected El 9 2 2 Figure 9 Headers El amp 2 RS 422 485 Selected Card Setup Clock Modes The IC975C LP employs a unique clocking option that allows the end user to select from divide by 8 and divide by 1 clocking modes These modes are selected at Header 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 8 mode silk screen D8 D 1 Figure 10 Clocking Mode Divide By 8 To select the maximum data rate 921 6K bps place the jumper in the divide by 1 silk screen D1 position DD 1 8 Figure 11 Clocking Mode Divide By 1 Card Setup Baud Rates and Divisors for the Divl mode The following table shows some common data rates and the rates you should choose to match
18. them if using the adapter in the Div1 mode For this Data Rate Choose this Data Rate 1200 bps 150 bps 2400 bps 300 bps 4800 bps 600 bps 9600 bps 1200 bps 19 2K bps 2400 bps 57 6 K bps 7200 bps 115 2 K bps 14 4 K bps 230 4K bps 28 8 K bps 460 8K bps 57 6K bps 921 6K bps 115 2K bps If your communications package allows the use of Baud rate divisors choose the appropriate divisor from the following table For this Data Rate Choose this Divisor 1200 bps 768 2400 bps 384 4800 bps 192 9600 bps 96 19 2K bps 48 38 4K bps 24 57 6K bps 115 2K bps 230 4K bps 460 8K bps 921 6K bps Isochronous Clocking Jumpers The Oxford Semiconductor 16C950 allows for the reception of both transmit and receive clocks for isochronous communications for a discussion on isochronous clocking refer to the Technical Description section The header that provides the selection of either a modem control signal or the clock option is header E3 RI DSR DTR TXC RXC TSET Figure 12 Header E3 Clocking and Modem control signal selection Installation Installation Operating System Installation Windows 95 98 ME NT 2000 XP Do not install the Adapter in the machine until the software has been fully installed 1 Start Windows 2 Insert the Black Box CD in to your CD drive 3 If Auto Start is enabled for this drive
19. to be the same at both the transmitting and receiving ends The communication parameters are baud rate parity number of data bits per character and stop bits i e 9600 N 8 1 15 Appendix D Silk Screen 2 536 0 ABBABBBHB ARAARAARAA oo oo oD oo oo oo oD op oo 1 m on on oo om oo oo oo oD oD oD oD 1m 0 4 721 Appendix D Silk Screen 16 Appendix Compliance Notices Appendix E Compliance Notices Federal Communications Commission Statement FCC This equipment has been tested and found to comply with the limits for Class A digital device pursuant to Part 15 of the FCC Rules These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment This equipment generates uses and can radiate radio frequency energy and if not installed and used in accordance with the instruction manual may cause har
20. tory is the Linux Serial HOWTO This series of files explains typical Linux serial implementations as well as informing the user to Linux syntax and preferred practices QNX Refer to D software seacom Other QNX6 Install readme where D your CDROM driver letter found on the Black Box CD This file contains valuable information on installing your adapter in the QNX6 Neutrino OS as well as the files required to ensure a flawless implementation Also provided on the Black Box CD are implementation instructions for QNX4 These are found in D software seacom Other QNX4 QNX_COM txt Installation Physical Installation The adapter can be installed in any 5V PCI expansion slot and contains several jumper straps for each port that must be set for proper Do not install the Adapter in the machine until the software has been fully installed 1 2 3 6 ve Turn off PC power Disconnect the power cord Remove the PC case cover Locate an available PCI slot and remove the blank metal slot cover Gently insert the PCI adapter into the slot Make sure that the adapter is seated properly Replace the screw This is required to ensure FCC Part 15 compliance Replace the cover Connect the power cord Installation is finished Technical Description Technical Description The Black Box IC975C LP provides a PCI interface adapter with an additional asynchronous serial port providing a versatile interface field selectable a
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