Description of Device
2-8 SIMATIC Panel PC 670 / 870 Operating Unit, Equipment Manual
Edition 07/01
2.3.3 Interface assignment
Table 2-2 Pin assignment of fron t-side USB interface
Pin Name Type Remark
4
4 USB_GND V Chassis ground for external USB in-
terface
4
3
3 USB_D0P B Data+, USB channel 0
3
2
2 USB_D0M B Data–, USB channel 0
2
1
1 USB_P5V_fused V + 5V (fused) for external USB inter-
face;
max. 100 mA, use an external power
supply for devices requiring higher
currents
Signal type
B Bi-directional
O Output
V Voltage
Note
The NEMA-standard versions do not possess a front-side USB inter-
face (see Appendix: Technical Data)
Front-side USB
interface