System manual CECX / CPU module
14.7.6 USB Port
A USB port is available for connecting a USB stick.
Serial Interface
0V
+24V
CAN
RXTX
USB
EthernetCANSerial Interface
Com pac t F lash
PowerCtrl
Diagnostic
X3
X3
X4
X4
X5
X5
X1
X2
X6
X7
X8
Location of the USB-port
CAUTION
ï‚· The use of USB-enabled devices from the computer world may result in
unexpected system behavior or system failures, as these devices are
not normally designed for operation in an environment with industrial
interference.
ï‚· Never keep USB-devices constantly connected, as the USB-ports are
not operationally reliable (danger of unplugging).
ï‚· For constant operations use a strain relief.
 The USB-ports are LowPowerPorts (≤ 100 mA). Larger loads such as
those from devices with HDD, DVD, ... must be self-powered as they
will otherwise trigger non-valid operating states.
14.7.6.1 Cable and plug specification
For more information: See chapter "General information about interfaces"
14.7.7 EMC and wiring guidelines
See chapter EU guidelines and standards.
Pay attention from the outset to careful wiring and shielding.
Further information: See system manual.
CECX-II 14-18
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