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Not Recommended for New Installations.
Please contact Technical Support for more information.
High Speed Asynchronous
to Synchronous Converter
Model 2011
Documentation Number 2011AS3297
B&B Electronics Mfg. Co. Inc.
707 Dayton Road -- P.O. Box 1040 -- Ottawa, IL 61350
PH (815) 433-5100 -- FAX (815) 433-5105
Internet:
http://www.bb-elec.com
orders@bb-elec.com
support@bb.elec.com
B&B Electronics -- September 1997
2011AS3297 Manual Cover Page
B&B Electronics -- PO Box 1040 -- Ottawa, IL
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Table of Contents 1.0 WARRANTY INFORMATION................................................... 1 1.1 RADIO AND TV INTERFERENCE ........................................... 1 1.2 SERVICE.................................................................................. 1 2.0 GENERAL INFORMATION ...................................................... 2 2.1 FEATURES .............................................................................. 2 2.2 DESCRIPTION .......................................
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1.0 WARRANTY INFORMATION B&B Electronics warrants all Model 2011 components to be free from defects, and will, at our option, repair or replace the product should it fail within one year from the first date of shipment. This warranty is limited to defects in workmanship or materials, and does not cover customer damage, abuse or unauthorized modification. If this product fails or does not perform as warranted, your sole recourse shall be repair or replacement as described above. Under no conditio
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2.0 GENERAL INFORMATION Thank you for your purchase of this B&B Electronics product. This product has been thoroughly inspected and tested and is warranted for one year parts and labor. If any questions or problems arise during installation or use of this product, please do not hesitate to contact B&B Electronics Technical Support at (815) 433-5100. 2.1 FEATURES • Conforms to CCITT V.22 and V.14 Standards • Lets asynchronous terminals communicate with synchronous modems and multiplexers • Accept
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3.0 CONFIGURATION The Model 2011 is configured using internal DIP switches. Figure 1 shows the location of the Model 2011's configuration switches. Figure 1. Switch locations on the Model 2011 PC board 3.1 ACCESSING INTERNAL SWITCHES The Model 2011's DIP switches are mounted on the PC board. To access the PC board, insert the blade of a small flathead screwdriver into the slot on one side of the Model 2011's case, then pop the case open by twisting the blade. Repeat on the other side of the case
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3.2.1 CHARACTER LENGTH Switches SW1-1 and SW1-2 operate jointly to set the asynchronous character length. The asynchronous character length setting is determined by combining the number of start, stop, data and parity bits that make up each character generated by the asynchronous DTE. The Model 2011 does not care about the composition of each asynchronous character, only its length is significant. Below are the combined switch settings that set the four possible asynchronous character lengths: S
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4.0 INSTALLATION The Model 2011 is designed to be used in pairs, with one unit installed between an asynchronous DTE and a synchronous DCE on either end of a synchronous communication link. Figure 3 illustrates a typical Model 2011 installation. Figure 3. Typical Model 2011 application 4.1 CONNECTING THE ASYNCHRONOUS PORT The asynchronous port of the Model 2011 is a DB-25 female and is configured as "DCE". Therefore it wants to talk to a DTE device such as a terminal or PC. The Model 2011 may be
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APPENDIX A: SPECIFICATIONS Data Rates: Up to 64 Kbps Clocking: Provided by modem or multiplexer Buffer: 4 bit RTS override feature empties buffers before dropping RTS Data Transmission: Full or half duplex Connectors: DB-25 female on asynchronous port, DB-25 male on synchronous port Power Supply: None required; uses power from data and control signals Temperature Range: 0-60°C (32-140°F) Altitude: 0-15,000 feet Humidity: Up to 95% non-condensing Dimensions: 3.2" x 2.0" x 0.75" Weight:2oz. 6 2011
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APPENDIX B: ASYNCHRONOUS PORT CONNECTIONS (CONFIGURED AS “DCE”) Pin Name Description 1 FG Frame Ground; connected straight to synchronous port 2 TXD Transmit Data (to 2011); data input from asynchronous port; Input to the 2011 power supply 3 RXD Receive Data (from 2011); data output to asynchronous port 4 RTS Request to Send (to 2011); input to the power supply 5 CTS Clear to Send (from 2011); connected straight through to synchronous port 6 DSR Data Set Ready (from 2011); connected straight thr
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APPENDIX C: SYNCHRONOUS PORT CONNECTIONS (CONFIGURED AS “DTE”) Pin Name Description 1 FG Frame Ground; connected straight to asynchronous port 2 TXD Transmit Data (from 2011); data output to synchronous port 3 RXD Receive Data (to 2011); data input from the synchronous port input to 2011 power supply 4 RTS Request to Send (from 2011); 4 bit delay from asynchronous port (2011 waits 4 bits before dropping RTS to the synchronous port; this facilitates use in a polling environment) 5 CTS Clear to Se
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APPENDIX D: BLOCK DIAGRAM 2011AS3297 Manual 9 B&B Electronics -- PO Box 1040 -- Ottawa, IL 61350 PH (815) 433-5100 -- FAX (815) 434-7094
