Rockwell Automation MSR04XI Serial Communications Module RS232 - Manual (Page 5)

MSR04XI October 2005 – Issue 8 5
Triguard SC300E MSR04XI Serial Communications Module RS232
TECHNICAL DESCRIPTION
PHYSICAL
The Serial Communications Module is a 9U high PCB with integral front panel and front and
rear connectors; a plug-in daughter board carries the RS232 interface circuits. Figure 1-1
shows the general layout, location of the connectors and front panel components.
Mechanical coding blocks
All Input/Output modules carry two mechanical coding blocks equipped with pins which mate
with holes in corresponding blocks in the chassis and prevent the module being inserted into
the wrong slot. The pins in the module blocks are factory installed in a pattern determined by
the module and corresponding set screws are removed from the chassis coding blocks to
enable fitting. Unused holes are plugged with set screws. The chassis mechanical coding
block configuration for this module is shown in Figure 2-1 .
Figure 2-1 Chassis mechanical coding block configurations
Links
The PCB has a total of nine links. For the top section of the PCB the links are located and
configured as follows:
Three LK1 links (3-pin) located approximately 80mm down from the top of the module, not user
configurable, link not fitted.
Three LK2 links (8-pin) located approximately 210mm down from the top of the module -
Module ID links which should always be fitted (refer to Figure 1-1).