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