xiB & xiB-64 - Technical Manual Version 1.06
51
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 3-34, Connecting Digital OUTPUT to a PNP-compatible device
Pull up resistor can be calculated as follows:
psu
input
input
V
V
R
I
Where:
psu
V
power supply voltage. Must be higher than required input amplitude
input
V
required input amplitude
input
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