Connecting The Function Earth - Siemens SIMATIC IOT2050 Operating Instructions Manual

NOTICE
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.
NOTICE
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
• Never operate the device without function earth.
• If a device is defective, remove it from operation without delay and label it accordingly.
SIMATIC IOT2050
Operating Instructions, 03/2020, A5E39456816-AA
WARNING
control cabinet or system in which the device is installed.
Installing and connecting the device
3.3 Connecting the device
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