HP kp721av Manuale Utente

The recommended cable length between the host and the USB device should be no longer than 
sixteen feet for full-channel (12 MB/s) operation, depending on cable specification (see 
following table). 

NOTE:
For sub-channel (1.5 MB/s) operation and/or when using sub-standard cable shorter lengths may be 

allowable and/or necessary.

The shield, chassis ground, and power ground should be tied together at the host end but left 
unconnected at the device end to avoid ground loops.

1

Vcc

+5 VDC 

3

USB+

Data (plus)

2

USB-

Data  (minus)

4

GND

Ground

20 AWG

0.036 

Ω

16.4 ft (5.00 m)

22 AWG

0.057 

Ω

9.94 ft (3.03 m)

24 AWG

0.091 

Ω

6.82 ft (2.08 m)

26 AWG

0.145 

Ω

4.30 ft (1.31 m)

28 AWG

0.232 

Ω

2.66 ft (0.81 m)

Data +

Green

Data -

White

Vcc

Red

Ground

Black