GE GFK-0787B Manuel D’Utilisation
1
1-8
Genius
tModular Redundancy Flexible Triple Modular Redundant (TMR) System
User’s Manual – March 1995
GFK-0787B
Genius I/O Blocks
Inputs and outputs in a GMR system are provided by Genius I/O blocks. Some types of
Genius blocks are now enhanced for GMR operation. In addition, these and other types
of blocks can be included in a GMR system as “non-voted” blocks. Non-voted blocks are
individual blocks that are present on GMR busses in the system; they are not part of any
GMR input group or output group. They are included in the GMR configuration and
they may be autotested.
Genius blocks are now enhanced for GMR operation. In addition, these and other types
of blocks can be included in a GMR system as “non-voted” blocks. Non-voted blocks are
individual blocks that are present on GMR busses in the system; they are not part of any
GMR input group or output group. They are included in the GMR configuration and
they may be autotested.
Discrete Blocks
All types of discrete blocks can be used as non-voted blocks in a GMR system.
The discrete blocks listed on page 1-2 are standard Genius blocks that are now
enhanced to include GMR functions. These blocks can be used in either GMR or
non-GMR systems. When configured for GMR operation (only), they perform output voting,
support GMR autotesting, and provide diagnostic reports to up to three PLCs. In
addition, certain of their operating parameters are changed when they are in GMR
mode.
enhanced to include GMR functions. These blocks can be used in either GMR or
non-GMR systems. When configured for GMR operation (only), they perform output voting,
support GMR autotesting, and provide diagnostic reports to up to three PLCs. In
addition, certain of their operating parameters are changed when they are in GMR
mode.
Analog, RTD, and Thermocouple Blocks
Analog blocks can be included in the GMR configuration and used in GMR input groups,
as either voted or non-voted inputs. However, analog blocks in GMR input groups are
not autotested by the GMR software.
as either voted or non-voted inputs. However, analog blocks in GMR input groups are
not autotested by the GMR software.
Analog blocks do not provide output voting, so they cannot be used in GMR output
block groups. However, they can be used as non-voted blocks in a GMR system, and
support standard Hot Standby Redundancy.
block groups. However, they can be used as non-voted blocks in a GMR system, and
support standard Hot Standby Redundancy.
Analog, RTD, and Thermocouple blocks operate the same way in either GMR or non-GMR
systems. No specific versions of these blocks are required for GMR use.
systems. No specific versions of these blocks are required for GMR use.
I/O Block Summary
The following table summarizes how different types of blocks can be used in a GMR system.
Basic Block Types
Can be GMR
Input Block
Can be GMR
Output Block
Can be
“non-voted”
GMR block
Can be
Autotested
Can be
non-GMR
block
24/48 VDC 16-Circuit Source block
24/48 VDC 16-Circuit Sink block
12/24 VDC 32-Circuit Source block
5/12/24 VDC 32-Circuit Sink block
24/48 VDC 16-Circuit Sink block
12/24 VDC 32-Circuit Source block
5/12/24 VDC 32-Circuit Sink block
yes
yes
yes
yes
yes
Any other discrete block
no
no
yes
no
yes
Analog, RTD, and Thermocouple
blocks
blocks
yes
no
yes
no
yes
High-speed Counter block
no
no
no
no
yes
Power Trac block
no
no
no
no
yes