Installation and User Manual
3.6Environmental Signal of the Media Contacts 11 BoardTerminals XR2, XR3, XR4 and XR5 on the "Media Contacts 11" board of each type of unit can be used to receive signals from the operating environment and to transmit signals concerning the operating status of the UPS, see Figure
The signals should be provided by
Emergency off:An NC contact causes shutdown of the inverter and the rectifier/charger, opening of
the battery circuit breaker, blocking of the static bypass and activation of a relay contact on the "Media Contacts 11" board.
Battery roomventilation fault: A ‘NO’ contact causes shutdown of the rectifier/charger.
Battery circuitbreaker QF1 closed: A ‘NO’ contact prevents inverter
Battery temperature: A
"Auxiliary" signals: Depending on the selected settings, these signals may be used to provoke:
-forced shutdown of the inverter (whatever the status of the bypass AC source),
-protected shutdown of the inverter (load transfer to the bypass AC source).
-limiting of the current drawn by the rectifier/charger (programmable value) when supplied by an engine generator set with an insufficient power rating. The additional power required by the inverter is supplied by the battery which discharges,
-limiting of the battery charge current (programmable value) if the normal AC source is replaced by an engine generator set with an insufficient power rating.
3.6.2Signal TransmissionAn auxiliary 24 Vpower supply:Isolated and backed up, is used to supply:
-the undervoltage release of the battery circuit breaker(s) QF1.
-the board that measures the temperature in the battery room.
"low battery"warning signal:(Volt-free changeover contact) indicating that battery time is about to run out.
The warning threshold may be personalized.
"load on UPS" signal:
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