Siemens SIMATIC IPC677D, Руководство по эксплуатации

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Mounting and connecting the device
3.3 Connecting the device
SIMATIC IPC677D
Operating Instructions, 09/2014, A5E32995420-AC
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3.3.5 Connecting peripheral equipment
Note
Ensure suitability for industrial applications
Connect only I/O devices approved for industrial applications according to EN IEC 61000-6-2.
Note
Peripheral devices capable of hot-plugging (USB)
Hot-plug I/O modules (USB) may be connected while the PC is in operation.
NOTICE
Peripheral devices incapable of hot-plugging
Peripheral devices that are incapable of hot-plugging may only be connected after the
device has been disconnected from the power supply. Strictly adhere to the specifications
for peripheral equipment.
Note
Wait at least ten seconds between removing and reinserting USB devices.
When using standard USB devices, bear in mind that their EMC immunity level is frequently
designed only for office environments. These USB devices are adequate for commissioning
and servicing purposes. Only industrial grade USB devices are permitted for use in industrial
environments. The USB devices are developed and marketed by the respective provider. The
product supplier in each case provides support for the USB devices. Moreover, the terms of
liability of the individual vendors or suppliers apply here.
Note
The connected or built-in I/Os, such as USB drives, should not introduce a reverse voltage
into the device.
Reverse voltages exceeding 0.5 V to ground that are generated by connected or installed
components can prevent proper operation of the device or lead to its destruction.