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Siemens Industrial PC Simatic Panel PC 677B User Manual

Page 19

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Connecting

4.1 Connection elements and operator controls

SIMATIC Panel PC 677B
Operating Instructions (Compact), 06/2008, A5E02217246-01

19

NOTICE

On / Off switch
The On / Off switch does not disconnect the device from the mains. When the switch is in

the 0 position, the device is still connected to the auxiliary voltage.

Connection components of the control unit

USB connection control unit

Pos Name

Description

(1)

USB

1 connection

USB 2.0 high current /

500 mA

under sealed cover

(not available with every

product variant).

NOTICE

Ensuring degree of protection P65
When the sealed cover over the USB interface is removed in order to connect a USB

component, the IP65 degree of protection for the device is no longer guaranteed.

Note
Use of USB devices

Wait at least ten seconds between removal and reconnection of USB devices. This also

applies to control units with touch screen panels, especially for touch operation.

When using standard USB peripherals, bear in mind that their EMC immunity level is

frequently designed for office applications only. These devices may be used for

commissioning and servicing. However, only industry-standard devices are allowed for

industrial operation.

Peripherals are developed and marketed by individual vendors. The respective

manufacturers offer support for the peripherals. Moreover, the terms of liability of the

individual vendors or suppliers apply here.