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12.3 PLC for General-purpose Control Function
12.3.1 Restriction on the number of units
When performing general-purpose functions, you will need the standard composition explained in 12.1, DC
input unit, and transistor output unit.
DC input unit and transistor output unit each supports 16 contacts. One system instrument uses two
contacts, so, up to 8 general-purpose units can be connected. When you connect 9 or more general-
purpose instrument, you will need to add one more PLC unit.
PLC standard composition
Up to 20 PLC units can
be connected to
TG-2000A.
(Maximum total number
of general-purpose
instrument is 160.)
DC input unit
PLC20
PLC2
PLC1
TG-2000A
Transistor output unit
One pair of DC input unit and transistor
output unit can accommodate up to 8
general-purpose instrument.
Figure 12-4 Restriction on the number of PLC units for multi-purpose control functions
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●
If mounting positions of the DC input unit and transistor output unit are incorrect,
they do not perform properly. Please mount the units referring to the diagram
above.
CAUTION
Summary of Contents for Central Controller G-50A
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