Compliance, safety, and intended use
18
Mako U Technical Manual V1.1.3
Setup causing a ground loop
Graphics legend
Gray line
Cable connection
Blue line
PE ground
Red line
Ground loop
Ground loop: GPIOs and PELV devices
In
Figure 2
, a USB camera uses non-isolated GPIOs, while PELV-powered devices
are resident in the environmental setup. In this case, avoid ground loops with a
barrier isolator. See
No ground loop: GPIOs and barrier isolator
on page 19.
Figure 2: Ground loop when using GPIOs
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PLC
PC
Power cable
USB cable
PE 1
PE 1
GPIO cable
I/O cables
Camera
Machinery
PELV powered
PELV powered
Ground loop
