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CyberResearch RS-485 - page 1
Serial Communications USER’S MANUAL VER. D • OCT 2001 No part of this manual may be reproduced without permission COMT 366 Series RS-232 to RS-485 Converter with LCD, 38.4 kbps Data Rate COMT 366M: DB-25M Connector COMT 366F: DB-25F Connector ® CyberResearch ® , Inc. www.cyberresearch.com 25 Business Park Dr., Branford, CT 06405 USA 203-483-8 ...
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CyberResearch ® Serial Comm unications COMT 366 Seri es CyberResearch, Inc . iii 25 Business Park Drive P: (203) 483-8815; F: (203) 483-9024 Branford, CT USA www.cyberresearch.co m ©Copyright 2001 All Rights Reserved. October 15, 2001 The information in this document is su bject to change without prior notice in order to improve reliability, desi ...
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COMT 366 Series CyberResearch ® Serial Comm unicatio ns iv ©Copyright 2001 Cy berResearch , Inc. COMT 366 Series ...
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CyberResearch ® Serial Comm unications COMT 366 Seri es CyberResearch, Inc . v 25 Business Park Drive P: (203) 483-8815; F: (203) 483-9024 Branford, CT USA www.cyberresearch.co m FCC Information WARNING: This equipment generates, uses, and can radiate radio frequency energy and if not installed and used in accordance with the instruction m anual, ...
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CyberResearch RS-485 - page 8
COMT 366 Series CyberResearch ® Serial Comm unicatio ns vi ©Copyright 2001 CyberRese arch, Inc . 1.0 General Description ............................ 1 1.1 The LCD .................................................................................... 1 2.0 Specifications ....................................... 3 2.1 Interface ...................... ...
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CyberResearch RS-485 - page 9
CyberResearch ® Serial Comm unications COMT 366 Seri es CyberResearch, Inc . 1 25 Business Park Drive P: (203) 483-8815; F: (203) 483-9024 Branford, CT USA www.cyberresearch.co m 1.0 General Description The COMT 366 converter provides a conveni ent method of interfacing EIA-232-based equipment with an RS-485 network using a ha lf-duplex, single tw ...
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CyberResearch RS-485 - page 10
COMT 366 Series CyberResearch ® Serial Comm unicatio ns 2 ©Copyright 2001 Cy berResearch , Inc. If the transmit signal is in the quiescent stat e (continuously low) onl y the lower segm ents and the vertical bar will be illum inated. This in dicates a constant nega tive state. If the transmit or receive inputs to the device we re streaming, i.e., ...
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CyberResearch RS-485 - page 11
CyberResearch ® Serial Comm unications COMT 366 Seri es CyberResearch, Inc . 3 25 Business Park Drive P: (203) 483-8815; F: (203) 483-9024 Branford, CT USA www.cyberresearch.co m 2.0 Specifications 2.1 Interface Conforms to EIA RS-232 and RS-485 specifications. 2.2 Connectors Five-position terminal block. 2.3 Data Rate 0 to 38.4 KBPS 2.4 Switches ...
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CyberResearch RS-485 - page 12
COMT 366 Series CyberResearch ® Serial Comm unicatio ns 4 ©Copyright 2001 Cy berResearch , Inc. 3.0 Installation The COMT 366 is designed to interface EI A-232 with RS-485 equipm ent. The EIA-232 device can be either a DTE or DCE type device. The DTE/ DCE selector switch allows for reversing Pins 2 and 3 ( TD and RD), thereby eliminating th e nee ...
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CyberResearch RS-485 - page 13
CyberResearch ® Serial Comm unications COMT 366 Seri es CyberResearch, Inc . 5 25 Business Park Drive P: (203) 483-8815; F: (203) 483-9024 Branford, CT USA www.cyberresearch.co m 4.0 Operation Operation in an RS-485 environm ent requires all devi ces attached to th e network to have some level of intelligence in o rder to esta blish an orderly flo ...
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CyberResearch RS-485 - page 14
COMT 366 Series CyberResearch ® Serial Comm unicatio ns 6 ©Copyright 2001 Cy berResearch , Inc. 4.1 Termination of the Line There are four user-selectable resistive term inating values w hich are implem ented using switches A and B of the dipswitch. As the length of the transmission cable and the number of users increases, the chosen value become ...
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CyberResearch RS-485 - page 15
CyberResearch ® Serial Comm unications COMT 366 Seri es CyberResearch, Inc . 7 25 Business Park Drive P: (203) 483-8815; F: (203) 483-9024 Branford, CT USA www.cyberresearch.co m 5.0 T r oubleshooting The following is a list of possible problems th at m ay arise during the installation and solutions to those problem s: 1. The data being received i ...
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CyberResearch RS-485 - page 16
COMT 366 Series CyberResearch ® Serial Comm unicatio ns 8 ©Copyright 2001 Cy berResearch , Inc. The converter may now be tested by setting the f ollowing switches: DCE on COMT 366 DTE Dip Switch 1 ON 2 OFF 3 OFF 4 ON If the converter is functioning correctly, any data entered on the keyboard of the terminal should appear on the screen and the TD ...
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CyberResearch RS-485 - page 17
CyberResearch ® Serial Comm unications COMT 366 Seri es CyberResearch, Inc . 9 25 Business Park Drive P: (203) 483-8815; F: (203) 483-9024 Branford, CT USA www.cyberresearch.co m 6.0 RS-232 Pin Number Assignments Pin EIA CCITT Name 2 BA 103 Transmit Data * 3 BB 104 Receive Data * 4 CA 105 Request t o Send ** 5 CB 106 Clear to Send ** 6 CC 107 Data ...
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CyberResearch RS-485 - page 18
COMT 366 Series CyberResearch ® Serial Comm unicatio ns 10 ©Copyright 2001 Cy berResearch , Inc. 7.0 Power The COMT 366 can be either host or self powered. In the self-powered mode, a wall- mounted transformer supplies low voltage AC and the required +12, -12, and +5 Volts are generated internally. For CO MT 366, supply +12 volts on Pin 9. 7.1 CO ...
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CyberResearch RS-485 - page 19
CyberResearch ® Serial Comm unications COMT 366 Seri es CyberResearch, Inc . 11 25 Business Park Drive P: (203) 483-8815; F: (203) 483-9024 Branford, CT USA www.cyberresearch.co m Product Service Diagnosis and Debug CyberResearch, Inc. maintains technica l support lines staffed by experienced Applications Engineers and Technicians. There is no cha ...
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COMT 366 Series CyberResearch ® Serial Comm unicatio ns 12 ©Copyright 2001 Cy berResearch , Inc. Intentionally Blank ...
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CyberResearch ® Serial Comm unications COMT 366 Seri es CyberResearch, Inc . 13 25 Business Park Drive P: (203) 483-8815; F: (203) 483-9024 Branford, CT USA www.cyberresearch.co m Warranty Notice CyberResearch, Inc. warrants t hat this equipme nt as furnished will be free from defects in material and workman ship for a period of one year fro m the ...
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COMT 366 Series CyberResearch ® Serial Comm unicatio ns 14 ©Copyright 2001 Cy berResearch , Inc. Intentionally Blank ...
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CyberResearch, Inc. 25 Business Park Drive Branford, CT 06405 USA P: (203) 483-8815; F: (203) 483-9024 www.cyberresearch.com ...
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