Rockwell Automation MSR04XI Serial Communications Module RS232 - Manual

Triguard SC300E
MSR04XI
Serial Communications Module
RS232
(MSR04XI)
Issue 8 October 2005
INTRODUCTION AND TECHNICAL DATA
PURPOSE
The Serial Communications Module provides a serial interface between the SC300E
environment and a variety of remote devices complying with the standard RS232-C. At least
one Serial Communications Module must be used in the system and fitted in Slot 10 of the
main chassis to enable communications between the system processors and the
workstations. The workstation link is used for loading the application software and monitoring
ladder and diagnostic functions. The link utilises Port 0 of the module. Additional modules can
be fitted to any other I/O slot, ‘wrong slotting’ is prevented by mechanical coding blocks (Figure
2-1 ). The system software identifies the module via a built-in hardware identifier.
Circuit triplication and voting procedures make the module single fault tolerant and front panel
indicators show Tx/Rx activity, the circuit on-line status and the health of the module.
Communications connections are via four identical ports on the front panel (Ports 0 to 3) and
these connections are duplicated on the field connector (J2) at the rear. A fifth port is for
diagnostic purposes only. The module is compatible with ‘single slot hot repair’ and the front
panel has a switch to enable a request that the module be taken off line.
This document is intended to provide a general understanding of the function of Serial
Communications Module, sufficient to enable basic maintenance operations to be effected in
the field.
008-5099