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User Manual 4 R1.0
2016-04-15
XMC4300 Relax EtherCAT® Kit-V1.1
For XMC4000 family
2 Hardware description
The following chapters provide a detailed description of the hardware and how it can be used. The hardware is depicted in
Figure 2.
Figure 2 PCB of the XMC4300 Relax EtherCAT® kits
2.1 Power supply
The XMC4300 Relax EtherCAT® Kit must be supplied by an external 5 volt DC power supply connected to any of the micro
USB plugs (X100, X101). Out of the box with the pre-programmed EtherCAT® slave application and the on-board debug
probe in operation, the XMC4300 Relax EtherCAT® Kit typically draws about 440 mA in an EtherCAT® environment. This
current can be delivered via the USB plug of a PC, which is specified to deliver up to 500 mA. The green Power LED (VDD3.3)
indicates the presence of the generated 3.3 V supply voltage.
On-board reverse current protection diodes will ensure safe operation when power is provided through both USB plugs at
the same time. These protection diodes allows to use the on-board debug probe connected with a PC/Notebook via X101
and a second host PC/Laptop connected with the XMC4300 Relax EtherCAT® Kit via X100.
If the board is powered via a USB plug, it is not recommended to apply an additional 5 Volt power supply to one of the 5
Volt power pins (VDD5, 5 V) on the Arduino headers or mikroBUS™ socket, because there is no protection against reverse
current into the external power supply. These power pins can be used to power an external circuit, but care must be taken