Technical data

Installation Instructions

http://www.mcg.mot.com/literature 1-21

The following circuits are protected by solid-state fuses that open during

overload conditions and reset themselves once the overload is removed:

❏ LAN AUI

❏ SCSI terminator

❏ Remote reset connector

❏ IndustryPack 5V

❏ ±12V

The

FUSES LED illuminates to indicate that all fuses are functioning

correctly. If a fuse opens, power must be removed for several minutes to

allow the fuse to return to a closed or shorted condition.

Serial Connections

The MVME172LX uses two Zilog Z85230 serial port controllers to

implement the four serial communications interfaces. Each interface

supports CTS, DCD, RTS, and DTR control signals as well as the TXD

and RXD transmit/receive data signals. Because the serial clocks are

omitted in the MVME172LX implementation, serial communications are

strictly asynchronous. The Z85230 is interfaced as DTE (data terminal

equipment) with EIA-232-D signal levels. The serial ports are routed to

four RJ-45 connectors on the front panel.

For additional information on the EIA-232-D interface, refer to the EIA-

232-D Standard.

Connection diagrams for the four serial ports on the MVME172LX are

provided in the following figures. These ports are connected to external

devices through cables connected to the front panel.