Siemens SIMATIC IPC547E, Руководство по эксплуатации

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Installing and connecting the device
3.3 Connecting the device
SIMATIC IPC547E
Operating Instructions, 02/2014, A5E32317120-AB
39
I/O devices
NOTICE
Fault caused by I/O devices
The connection of I/O devices can cause faults in the device. The result may be personal
injury and damage to the machine or plant. Note the following:
•
Connect only I/O devices which are approved for industrial applications in accordance
with EN 61000-6-2/IEC 61000-6-2.
•
Non-hot-plug capable I/O devices may only be connected when the power supply to the
device is switched off.
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.
See also
Switching off the device (Page 53)
3.3.2 Connection of equipotential bonding
A low-impedance earth connection ensures that interference signals generated by external
power supply cables, signal cables or other cables to the I/O devices are safely discharged
to earth.
The equipotential bonding connection on a device has a large surface and makes contact
over a large area. The equipotential bonding connection is identified by the following symbol:
Requirement
● T20 screwdriver