BERGHOF DC1005 - Usb

Product Description BERGHOF Automation
34 DC1000_HB_en_2D0982003ZD00.doc 2VF100107FE03.doc
2.7.4. USB
Devices equipped with USB interfaces can be connected to the two USB master
ports (Rev. 1.1). The USB on the back (X3) and the front USB (under the IP65
cover) are connected via an internal USB hub.
The only USB devices classes which can be employed for CoDeSys users are
USB sticks. A mouse can only be employed at the Linux level. The following points
must be taken into consideration when USB sticks are employed:
A USB stick may only be pulled during operation if all file operations have
been completed, otherwise the USB stick may become unusable!
If programs still have files open, the directory will no longer be able to be re-
moved once the USB stick has been pulled. In this situation file or directory op-
erations will result in blockages because information is to be read from a device
that is no longer available in the system. Therefore, always make sure that no
program still has open files in the USB stick before pulling the stick.
• USB memory sticks can be inserted and pulled during operation. The inserted
device is automatically detected and mounted in the /media/usbX directory.
When the USB stick is pulled, the associated /media/usbX directory automati-
cally “disappears” provided no program is currently accessing it (see above).
• Either the first partition or, if there are no partitions, the entire memory will be
mounted on the memory stick, in other words, the associated directory appears
automatically.
• The first stick is mounted under /media/usb0, the second under /media/usb1,
and so on. A maximum of 8 sticks may be inserted simultaneously
(/media/usb[0-7]). If a new (or previously inserted, then pulled) stick is inserted
it will be placed on the directory with the lowest number. Connecting a USB
hub allows multiple sticks to be operated at a given USB interface. Care must
be taken that no USB devices are still inserted in the hub when the hub is itself
inserted or pulled.
The mechanical structure of the USB port is designed for a maximum of 1.000 in-
sertion cycles.
X3 connector Pin assignment (identical for the front USB):
X3
B1
VCC
B2
D-
B3
D+
USB
B4
GND
A maximum current of 0.5 A is available at the USB ports (combined)!
A device requiring more current will therefore not function and may be damaged.