Rockwell Automation Chassis Models - Manual

Triguard SC300E
Chassis Models
Chassis Models
Issue 4 October 2005
INTRODUCTION
PURPOSE
The chassis accommodates the various system modules and their power supplies. It
comprises a 9U standard 19 inch rack mounting module cage and a printed circuit backplane.
NOTE
A ‘U’ is one unit and measures 44mm (1.75 inches). The ‘U’ is an industry standard and used by
equipment cabinet manufacturers as a measure of height for rack systems.
The modules and power supplies plug into connectors on the front of the backplane. External
power and signal connections are made via connectors on the rear of the backplane (see
Figure 2-1).
The same basic chassis is configured as a main chassis or an extension chassis by the type
of module fitted in slots A, B and C. A keying system prevents the insertion of Power Supply
Units (PSUs) of the wrong voltage type.
SC300E SYSTEM OVERVIEW
The SC300E is a cost effective, fault tolerant control system suitable for use in industrial
situations where the control system's reliability, availability and predictable performance is of
paramount importance. The SC300E is certified for use in safety applications, such as fire and
gas detection/protection and process emergency shutdown, as well as sequence and batch
process control.
ARCHITECTURE
The two key components of the SC300E, that permit system’s availability in excess of
99.999% (about 1 hour’s downtime in 11 years) to be realised, are:
• Triple Modular Redundant architecture - TMR
• Software Implemented Fault Tolerance - SIFT
008-5097