Description of Device
2-7
SIMATIC Panel PC 670 / 870 Operating Unit, Equipment Manual
Edition 07/02
2.3
Interfaces
The operating unit has interfaces on the front and rear sides.
2.3.1
Front-side USB interface
On the front side of the panel (see Figures 2-1 and 2-7) there is a USB in-
terface *) protected by a rubber cover. This can be used, for example, to
connect an external keyboard or an external mouse.
*) not present on front panels without front side USB interface (refer to Ap-
pendix “Technical Data”)
Note
When using generally available USB peripheral devices, you should
note that their electromagnetic compatibility is frequently designed
only for an office environment.
Such devices are adequate for commissioning and for servicing pur-
poses; for industrial applications, however, we recommend the use of
industry-standard components.
2.3.2
Rear-side interfaces
On the rear side (see Figure 2-8) there are two ribbon cables for connec-
tion of the computing unit:
S
the I/O USB cable K1 at X1 for all signals, apart from the display inter-
face, relevant for the connection of operating units.
S
the display cable K2.
Display
cable K2
IO/USB
cable K1
Fig. 2-8
Interfaces on the rear side of the operating unit
