Manual

Multiplexed I/O Module (T3491)
PD - 6035 Mar - 06 3
Figure 2 . Block Diagram of Multiplexed I/O Module.
The Voter, FPGA and triple buffers provide an interface to the
triplicated I/O Safetybus. The Mux I/O module receives
configuration data over the I/O Safetybus from the processor
modules. This information defines the types of Multiplexed
I/O Unit equipment connected to the Mux I/O module. The
information is stored in the module’s dual ported RAM
memory.
The RAM memory is arranged into four blocks. One block is
used to download the Mux I/O equipment configuration. The
second block is used for reporting fault conditions. A third
block is used f or writing output data, and the fourth block is
used for reading input data. The on - board microprocessor uses
this information to read and write I/O data via the two serial
ports.
Testing and Diagnostics
Comprehensive testing and diagnostics are used to determine
correct operation to the Mux I/O Module and connected MIU
equipment.