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PSBEN3012D/LCD
BLACK POWER
21
5.7 Input of collective failure EXT IN.
The EXT IN (external input) technical input indicating a collective failure is intended for additional, external
devices that generate the failure signal. The voltage at the EXT IN input will save information about an incident in
the internal memory of the power supply and sending the signal about the failure to the PSU FLT output.
The EXT IN technical input has been implemented with galvanic isolation between the PSU’s systems
and the devices attached.
Fig. 16. Electrical diagram of the EXT IN input.
The electrical diagram below shows the way of connecting external devices to the EXT IN input. Outputs
such as: OC (open collector), relay may be used as a source of the signal.
Fig. 17. Examples of connections.
In the option with tamper switches, the V
EXT
jumper must be on. It polarizes the EXT IN input circuit
therefore is required in such configuration.
The EXT IN input has been adjusted to cooperate with fuse modules that generate a failure signal in case
of a fuse fault in any of output sections (e.g. AWZ535, AWZ536). To guarantee a correct cooperation between the
module and the EXT IN input, the V
EXT
jumper must be on and the connections are to be made accordingly to the
diagram below.
Fig. 18. Example of a connection with the fuse module: AWZ535 or AWZ536.
