Installing and connecting the device
3.3 Connecting the device
SIMATIC IOT2050
30 Operating Instructions, 03/2024, A5E39456816-AF
Damage through regenerative feedback
Regenerative feedback of voltage to ground by a connected or installed component can
damage the device.
Connected or built-in I/Os, for example, a USB drive, are not permitted to supply any voltage
to the device. Regenerative feedback is generally not permitted.
Ferrite required at USB cables
The interference immunity of the device according to the data in the technical specifications
is only guaranteed when the cables at USB and micro USB ports are equipped with a ferrite
magnet. Use only USB cables equipped with a ferrite magnet.
3.3.2 Connecting the function earth
A connected function earth discharges electrical charges from the metal enclosure.
The function earth also improves the discharge of interference generated by external power
cables, signal cables or cables for I/O modules to ground.
The connection for the function earth is labeled with the following symbol:
Electric shock and risk of fire
High voltage may be present in a defective device, which can cause fire or an electric shock
if touched. This can result in death and serious injury.
• Connect the device to the function earth before you put it into operation.
•
The function earth terminal on the device must be connected to the function earth of the
control cabinet or system in which the device is installed.
• Never operate the device without function earth.
• If a device is defective, remove it from operation without delay and label it accordingly.
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