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RSU-503 Redundancy Switch Unit Installation ... - Comtech EF Data

RSU-503 Redundancy Switch Unit Installation ... - Comtech EF Data

Errata A

Errata A Comtech EFData Documentation Update Subject: Changes to Chapter 3 (Communications Link Jumper Setting) Date: July 28, 1997 Document: RSU-503 Redundancy Switch Unit Installation and Operation Manual, Rev. 8, dated April 4, 1997 Part Number: MN/RSU503.EA8 Collating Instructions: Attach this page to page 3-1 Comments: The following changes provide the correct information for jumper placement when choosing between RS-232 or -485. This information will be incorporated into the next revision. Change Specifics: 3.4.1 Communications Link The terminal functions can be remotely controlled and monitored via an RS-485 or RS-232 communications link. • The RS-485 interface makes it possible to operate 255 terminals on a common communications link. • The RS-232 interface is used to communicate with a single terminal. The M&C module must be hardware configured on the M&C board to one of the two interfaces. Refer to the following table for jumper placement at JP1: RS-485 Configuration RS-232 Configuration 1-2 9-10 3-4 11-12 5-6 13-14 7-8 15-16 Filename: T_ERRATA 1

RSU-503 RSU-503 Copyright © Comtech EFData, 2000 All rights reserved. Printed in the USA. Comtech EFData is an ISO 9001 Registered Company Redundancy Switch Unit Installation Installation and and Operation Operation Manual Manual Part Number MN/RSU503.IOM Revision 8 April 4, 1997 Special Instructions: This is the ninth edition of the manual. Change bars were not utilized. For an overview of changes made to Rev. 7, refer to the preface (“Overview of Changes to Previous Edition”). This revision supersedes part number MN/SDMRSU503 Rev. 7 dated January 22, 1996. Comtech EFData, 2114 West 7th Street, Tempe, Arizona 85281 USA, (480) 333-2200, FAX: (480) 333-2161.

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