xiQ - Technical Manual Version 1.35
50
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 3-45, 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
>
−
Connecting Cameras in Master-Slave setup
Connecting Opto-isolated Digital output to Opto-isolated Digital input (master biased)
Use power supply in range 7-24V DC and current rating more than N * 5mA where N is number of cameras. Current trough
master camera output is limited by slave camera inputs. Maximal allowed current is 25mA. This gives practical limit of maximum
5 slave MQ cameras (or other models with opto-isolated input)
figure 3-46, Connecting Digital OUTPUT to a Opto-isolated Digital input (master biased)
GND (Common IO Ground)
DIGITAL OUTPUT
Common
PLC Device
Input
MQ Camera
Power Supply
External pull up
