MSA SUPREMA Touch, Installation & Maintenance Instructions Manual, Page: 235 / 309

SUPREMA 234
Redundant Systems
MSA
US
13.2 Function of Redundant Systems
The circuit diagram of the redundant system shows its design and function: The signal from the
sensors connected to the MAT modules is amplified by the sensor modules (MCI, MPI) to give a
voltage of approx. 400 ... 2000 mV. By 2 separate A/D converters (on MAI + MAR), the measuring
signal is digitised and transferred to the two processing channels A and B by passing it through
the MDA modules (A + B) to the separate CAN Bus systems (channels). The signal processing
and evaluation of one channel is carried out independently from the other. The Table “Modules
of the Rack” shows the different components of the rack for a non-redundant and a redundant sys-
tem.
Module Functions
MDA Module = Measuring Signal Input
MCP Module = Measuring Signal Evaluation
MGO Module = Alarm Output
MAI Module = Analog Input (ADW 1)
MRA Module = Analog Redundant (ADW 2)