xiQ - Technical Manual Version 1.35
51
Connecting Opto-isolated Digital output to Opto-isolated Digital input (slave 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 from master output is 25mA. This gives
practical limit of maximum 5 slave MQ cameras (or other models with opto-isolated input)
figure 3-47, Connecting Digital OUTPUT to a Opto-isolated Digital input (slave biased)
Connecting Opto-isolated Digital output to Opto-isolated Digital input (PNP-compatible device)
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 used pull-up resistor. Maximal allowed current from master output is 25mA. Also the current
needed high enough to trigger camera inputs. Nominal current for camera input is 5mA. Resistor need to be selected according
to following criteria.
𝑅𝑅
> (
𝑉𝑉
𝑃𝑃𝑃𝑃𝑃𝑃
−
0.7
𝑉𝑉
) 25
𝑚𝑚𝑚𝑚
⁄
𝑅𝑅
< (
𝑉𝑉
𝑃𝑃𝑃𝑃𝑃𝑃
−
4
𝑉𝑉
) (
𝑁𝑁
× 5
𝑚𝑚𝑚𝑚
)
⁄
figure 3-48, Connecting Digital OUTPUT to a Opto-isolated Digital input (PNP-compatible device)
