BECKHOFF CB4051 - Manual (Page 28)

Chapter: Connectors USB 5 and 6, LAN2
page 28 Beckhoff New Automation Technology CB4051
4.9 USB 5 and 6, LAN2
USB channels 5 and 6 are combined with LAN2 into one standard IDC socket connector with a spacing
onf 2.54 mm. All required settings can be accomplished in BIOS setup.
The USB channels support USB 2.0. You may note that the setting of USB keyboard or USB mouse
support in the BIOS-setup is only necessary and advisable, if the OS offers no USB-support. BIOS-setup
can be changed with a USB keyboard without enabling USB keyboard support. Running Windows with
these features enabled may lead to significant performance or functionality limitations.
Every USB interface provides up to 500 mA current and is protected by an electronical fuse.
The LAN-interface supports 10BaseT, 100BaseT, and 1000BaseT compatible net components with
automatic bandwidth selection. Additional signals are provided for status LEDs.
Description Name Pin Name Description
5V for USB5 USB5 VCC 1 2 USB6 VCC 5V for USB6
USB- channel 5 USB5# 3 4 USB6# USB- channel 6
USB+ channel 5 USB5 5 6 USB6 USB+ channel 6
ground GND 7 8 GND ground
LAN active LED ACTLED2 9 10 LILED2 LAN link LED
LAN 1 + LAN1 11 12 LAN0 LAN 0 +
LAN 1 - LAN1# 13 14 LAN0# LAN 0 -
LAN 3 + LAN3 15 16 LAN2 LAN 2 +
LAN 3 - LAN3# 17 18 LAN2# LAN 2-
LAN link 100 LED SPEED100 19 20 3.3V 3.3 volt supply
N OTE
LAN LEDs are most commonly connected in the following way: Pins 9 and 20 are connected to a
conventional LED while pins 10 and 19 are connected to a bi-color LED. The latter indicates "link" and
"link100" each in a different color. In rare cases it can be desirable to have one separate LED for each of
the three signals "active", "link", and "link 100". For this non-standard solution to work you need to add a
330Ohm resistor to the LILED2 line.