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Switching the Current Sink (NPN) and Current Source (PNP)
12.1 Switching the Current Sink (NPN) and Current
Source (PNP)
The external I/O MODE switch (NPN/PNP) allows you to change the type of the compatible PLC.
NPN is sinking current and PNP is sourcing current.
It is set to NPN at the time of shipment from the factory.
CAUTION
Turn off the instrument and then switch the external I/O mode switch (NPN/
PNP).
Set the NPN/PNP setting according to the devices to be connected externally.
Otherwise, the devices connected to the external I/O terminal could be damaged.
Use the NPN/PNP switch on the back of the instrument.
Rear
Current sink
(NPN)
Current source
(PNP)
EXT. I/O MODE switch (NPN/PNP) setting
NPN
PNP
Instrument input circuit
Compatible with sink output
Compatible with source output
Instrument output circuit
Non-polar
Non-polar
ISO_5 V output
+5 V output
−5 V output
External Control (EXT
. I/O)
HIOKI ST5680A961-00
Содержание ST5680
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