BECKHOFF CU8004-0000 - Manual (Page 8)

Installation
CU8004-0000 6
3 Installation
3.1 Mounting
The USB hub CU8004-0000 can be snapped onto a 35 mm mounting rail conforms to EN 50022.
To release the CU8004-0000 from the C mounting rail
• first pull the lug at the bottom of the hub downwards by using a screw driver
• then pull the hub from the mounting rail
3.2 Power Supply
The USB hub CU8004-0000 requires a 24 V
DC
supply for it’s operation. The connection is made by means of the
terminal X10, labeled 24 V. This supply feeds the hub electronics and, over the USB downstream ports, the
connected USB devices (5 V
DC
). It is protected against polarity reversal.
3.2.1 UL requirements
Danger
For the compliance of the UL requirements the USB hub CU8004-0000 should only be
supplied
• by a 24 V
DC
supply voltage, supplied by an isolating source and protected by means
of a fuse (in accordance with UL248), rated maximum 4 Amp.
• by a 24 V
DC
power source, that has to satisfy NEC class 2.
A class 2 power supply shall not be connected in series or parallel with another
(class 2) power source!
Danger
To meet the UL requirements, the USB hub CU8004-0000 must not be connected to
unlimited power sources!