Electrical installation
Page 99
8.9
Connection: USB [X19]
8.9.1
Device side [X19]
USB female, type B
8.9.2
Counterplug [X19]
USB male, type B
8.9.3
Pin assignment [X19]
Table 39:
Pin assignment: USB interface [X19]
Pin No.
Denomination
Values
Specification
1
VCC
+ 5 VDC
2
D-
Data -
3
D+
Data +
4
GND
GND
Figure 25:
Pin assignment: USB interface [X19], front view
8.9.4
Cable type and design [X19]
Interface cable for the USB interface, 4 cores, shielded and twisted.
In order to set up a USB connection, it is mandatory to use a twisted and shielded (4-core) cable since, otherwise, the
transmission may be subject to interferences. In addition, it must be ensured that the cable has a wave impedance of 90 Ω.