Plc For General-Purpose Control Function; Restriction On The Number Of Units - Mitsubishi Electric G-50A Technical Manual

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.
Figure 12-4 Restriction on the number of PLC units for multi-purpose control functions
CAUTION
80
Up to 20 PLC units can
be connected to
PLC20
TG-2000A.
(Maximum total number
of general-purpose
instrument is 160.)
PLC2
PLC1
PLC standard composition
TG-2000A
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.
DC input unit
Transistor output unit
One pair of DC input unit and transistor
output unit can accommodate up to 8
general-purpose instrument.