ABB REO 517 Applications Manual page 44

Multi-function terminals for railway application
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34
Logic function blocks
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The GT function block is used for controlling if a signal should be able to pass or not
depending on a setting. The function block (figure 7) has one input, designated GTnn-
INPUT, where nn presents the serial number of the block. Each GT circuit has one out-
put, GTnn-OUT. Each gate further has a Operation On/Off which controls if the INPUT
is passed to the OUT or not.
GTnn
INPUT
Operation = On
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The output signal from the GT function block is set to 1 if the input signal is 1 and Op-
eration = On elsewhere it is set to 0. See truth table below.
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