xiX - Technical Manual Version 1.3
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3.10.2.4.3.
Connecting Digital OUTPUT to a PNP-compatible device
Output state
Output switch state
Input state
ON
Sinking
current
Not
energized
OFF
Relaxing
Pull up (energized)
figure 3-56, Connecting Digital OUTPUT to a PNP-compatible device
Pull up resistor can be calculated as follows:
psu
input
input
V
V
R
I
−
=
Where:
p s u
V
power supply voltage. Must be higher than required input amplitude
input
V
required input amplitude
inp ut
I
input driving current (corresponding to input amplitude)
Remember to use the appropriate resistor power rating
( ) (
) *
psu
input
input
P R
V
V
I
>
−
GND (Common IO Ground)
DIGITAL OUTPUT
Common
PLC Device
Input
Camera
Power Supply
External pull up