Kvaser USBcan Pro 4xHS User’s Guide
10 (25)
you can use USB hubs or USB extension cables with a built-in hub. By chaining up
to 5 hubs, you can achieve an effective cable length of up to 25 m (
∼
82 ft).
As USB cables become longer they are more sensitive to EMI,
because they make a longer antenna that can pick up more
noise. These issues can be mitigated by using higher quality
cables with better shielding. Thicker cables tend to be better than
thin ones, and braided shielding tends to be more reliable than
only foil. Furthermore, longer cables may introduce signal
degradation and timing issues that, if necessary, can be mitigated
using shorter cable segments combined with hubs that amplify
the signal and handle delays on a per-cable basis.
3.3
CAN channels
The Kvaser USBcan Pro 4xHS has four CAN channels in a single 26-pin HD
D-SUB CAN connector (see Figure 3). See Section 4.4, CAN connectors, on
Page 15 for pinout information.
Figure 3: CAN connector on Kvaser USBcan Pro 4xHS
3.4
Power supply
The Kvaser USBcan Pro 4xHS is powered from the USB port.
3.5
LED Indicators
The Kvaser USBcan Pro 4xHS has one power LED and one traffic LED for each
CAN channel as shown in Figure 4 on Page 11. Their functions are described in
Section 4.1, Definitions of LED states and colors, on Page 12.
Kvaser AB, Mölndal, Sweden — www.kvaser.com
