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External Input/Output Terminal and Signals
7.1 External Input/Output Terminal and Signals
Switching between current sink (NPN) and current source
(PNP)
Before switching, thoroughly read “Before switching between current sink (NPN) and
current source (PNP)” (p. 11).
The EXT.I/O mode switch (NPN/PNP) allows you to change the type of PLC
(programmable controller) that is supported.
The instrument ships with the switch set to the NPN position.
EXT.I/O mode switch (NPN/PNP) setting
NPN PNP
Input circuit Supports sink output. Supports source output.
Output circuit Non-polar Non-polar
ISO_5 V output +5 V output -5 V output
Current sink (NPN) on the left
Current source (PNP) on the right
CAUTION
Do not operate the EXT.I/O mode switch (NPN/PNP) while the instrument is
on.
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