Siemens SIPROTEC 7RW80 Manual page 156

Mounting and Commissioning
3.2 Checking Connections
USB Interface
The USB interface can be used to establish a connection between the protection device and your PC. For the
communication, the Microsoft Windows USB driver is used which is installed together with DIGSI (as of version
V4.82). The interface is installed as a virtual serial COM port. We recommend the use of standard USB cables
with a maximum length of 5 m/16 ft.
Table 3-2
Pin No.
USB
Connections at port A
If the interface is used for communication with the device, the data connection is to be checked.
Table 3-3
Pin No.
1
2
3
4
5
6
7
8
156
Assignment of the USB socket
1
VBUS D-
(unused)
Assignment of the port A socket
Ethernet interface
Tx+
Tx-
Rx+
—
—
Rx-
—
—
2 3
D+
C53000-G1140-C233-1, Release date 10.2010
4 Housing
GND Shield
SIPROTEC, 7RW80, Manual