Switch output voltages

You can switch the output voltages U_S and U_P of each output individually.

Protective functions can prevent an output voltage from being switched on.

A switched-on output voltage is signaled in two ways:

• Status LEDs.
• Status bits in the process data:
• "DPO Inputs Channel n" > "Status" > "Status Us"
• "DPO Inputs Channel n" > "Status" > "Status Up"
  (with: n = 0 for channel 1, n = 1 for channel 2, n = 2 for channel 3, n = 3 for channel 4)

The output variable “DPO Outputs Device” > “Enable Control Via Fieldbus” determines whether the output voltages are switched automatically or manually:

• "0": automatic (factory setting)
• "1": manual

Inadvertent switching of output voltages. If you change the value of “Enable Control Via Fieldbus”, it can happen that output voltages are switched on or off. To prevent this, match the values of the CoE indices (automatic switching) and output variables (manual switching) mentioned below before changing the value of “Enable Control Via Fieldbus”.

Automatic switching

In the factory setting, all output voltages are switched on automatically when the supply voltage U_S is applied. You can activate or deactivate automatic switch-on for each output voltage individually.

The following table shows the correlation of the output voltages and the CoE indices that control the automatic switch-on.

Value range:

• "1": U_S/U_P is switched on automatically when U_S is applied (factory setting).
• "0": U_S/U_P remains switched off when U_S is applied.

The output voltages are switched on with a time offset. The time offset prevents the input inrush currents of the connected devices from adding up.
You can set the time offset in CoE index F80E:11 "Startup Delay":

• "0": "Fast"
• "1": "Moderate"
• "2": "Slow"

Manual switching

Set the variable “Enable Control Via Fieldbus” to “1” to be able to switch the output voltages manually via output variables.