xiQ - Technical Manual Version 1.35
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Connecting Digital OUTPUT to a NPN-compatible PLC device input
This type of connection is possible only when opto-isolated input is used (bidirectional in some cases) or when only one general
opto-isolated input is used.
Output state
Output switch state
Input state
ON
Sourcing current
Pull down (energized)
OFF
Relaxing
Not energized
figure 3-43, Connecting Digital OUTPUT to a NPN-compatible PLC device input - more bidirectional inputs used
Note:
•
In this case a bidirectional opto-isolated input must be used
figure 3-44, Connecting Digital OUTPUT to a NPN-compatible PLC device - single input
GND (Common IO Ground)
DIGITAL OUTPUT
Common
PLC Device
Input
MQ Camera
Power Supply
GND (Common IO Ground)
DIGITAL OUTPUT
IN-
PLC Device
IN+
MQ Camera
Power Supply
