EP9224 - Introduction

EP9224 - Introduction 1:

Power distribution for EtherCAT Box modules with current measurement/data logging

The EP9224-0023 enables connection of four power supply branches. In each branch the current consumption for the control voltage US and the peripheral voltage UP is monitored, limited, and, if necessary, switched off.

The input voltage and current values of all outputs can be evaluated via the process data. A continuous data log of the relevant data can be retrieved when an error occurs in order to localise the cause of the error.

The power distribution is supplied via a 7/8" connector with up to 16 A (per voltage supply US/UP). Several modules can be configured in a cascade arrangement. In the event of a short-circuit in one of the four outputs, the affected output is switched off. The supply for the other branches remains active. The switch-off and control is done in such a way that the input voltage does not fall below 21 V or other modules are going down, caused by undervoltage. During startup consumers with large capacities can be added without problem.

The master can read diagnostic messages from the individual channels via the EtherCAT interface. Independent switching of individual consumer branches is also possible via the EtherCAT master.

In delivery state the eight outputs of the box (4 times Us, 4 times Up) are activated to enable operation without EtherCAT.

After an error caused the switch off of a channel, this channel remains switched off when you try to switch it on again and has to be set back actively by the EtherCAT master or a hardware reset at the box (lower M8 socket).

Additional to this basic functionality that is also provided by EP9214, the EP9224 displays the voltage values of PowerIn supply and all current values of inputs and outputs within the process data.

The box has got an internal log file, that is writing the system values continuously into a ring buffer. This data logging has to be activated at the startup.
In error case it is stopped, so a history of the system parameters from before the error case can be read out. This enables a much quicker error localization.

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