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2.4 INPUTS Y OUTPUTS
In this chapter are described the rear connectors of the NEO series equipment.
Depending on the model, the equipment will or will not include some of the types described in
this section and quantity may vary.
The monitoring interfaces for emergency power supply and general inputs/outputs for
activating the emergency, are available in all equipment of the NEO series. From the
con figuration software it is possible to select which ones will be used.
2.4.1 EMERGENCY POWER SUPPLY MONITORING
(a) MONITORING INPUTS FOR THE EMERGENCY POWER SUPPLY
It allows the connection to the system of the status-
output signals from the emergency back-up power supply.
It has three double contact closure inputs: main power
supply failure, battery failure, failure in any of the
emergency power outputs.
Each input has three terminals: Normally Closed
(NC), Common and Normally Open (NO). To activate any
of the fault signals, a contact closure input on NO should be produced, and simultaneously an
opening of a contact closure on NC input. In any other case, it will detect fault in the
connection.
The connection is made through a female 9 pin euroblock connector and 3.81 mm pitch
(supplied with the unit). The wire size range for each pole of this connector is: 0.14 1.5 mm2
(30 14 AWG).
Marking Description Type Signals Activation
Failure in the main power supply. Input NC ┴ NO
Contact closure free of voltage between
┴ NO
and
Open contact closure free of voltage
between ┴ NC
Battery failure Input NC ┴ NO
Contact closure free of voltage between
┴ NO
and
Open contact closure free of voltage
between ┴ NC
Failure in the emergency power
supply output.
Input NC ┴ NO
Contact closure free of voltage between
┴ NO
and
Open contact closure free of voltage
between ┴ NC
Table 1: Emergency Source Monitor Inputs
NOTE: Some EN 54-4 battery chargers have the same monitoring interface but with the
inverse meaning of the NC and NO. It is recommended to revise the operating instructions in
the user's manual. E.g. The model SONAES requires to invert the NC and NO connections.
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Picture 7: Monitoring inputs for the back-
up power supply.
User's Manual: EN 54-16 PA/VA System LDA NEO
Picture 6: Inputs and Outputs