Black Box IC476A-F-R2, IC477A-F-R2, IC477A-M-R2, IC476A-M-R2, IC478A-F-R2, IC478A-M-R2 manual Cable11

Page 19

ASYNC 232↔422/485 CONVERTER

relief10. Bendassemblythetop.Dohalfnotofsnapthethecasecasenecessarytogetheryettoplace. itoverthestrain-

Cable11.

4modeusingSome.1.3 —2thisRS-Wthen-485IREconfiguration,useCdvicesONNECTIONemploybesureatwoto-firstwire,sethalfthe-duplexConvertconfigurationto“twowire”.When

only the transmit (XMT) pair asshownbelow:

Converter Signal	RS-485 Signal
XMT+	+ (positive)
XMT-	- (negative)
	blocks
	IMPORTANT!
	chapter
If you are not using two IC476A-X-R2s ba		to back and the procedure on
the previous page produces garbage ata (		none at all), flip the “A” and
	terminalofthis	ofwhether.For.specificyouarewiringmakingthe
instructions,RSThe-485wiring“B”connecleadspatreferattiontoeviaDB25aboveendtheofbeginningappliesegardlesstheor485 con ection.

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Contents Async 232↔422/485 Converter TheCEsymbolonyourAsync232CE Notice Ser Cap Configuration Upto115,200bps SpecificationsLb.0.5kg Introduction TheAsync232Configuration DIP Switch S1 ConfigurationAsync 232↔422/485switchCONVERTER Switch S1 Summary Table Position Function Factory Default Configura ionReceivers Typical Switch Applications Switch Settings Installation At all, f ip the a Leads at InstallationConverter RS-485 Device Firmlyit8 Cable11 S allation DB25Page Direction Standard DCE Setting Appendix A. RS-232C Pin ConfigurationsTEReadyBnegative Appendix B /485 Pin ConfigurationAppendix C. Self-Test There’snotenoughoranypowertotheConverter.TheCopyright 1998. Black Box Corporation. All rights reserved