User Manual: NEO System
14
Rev.0.3
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 configuration
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
This allows the connection of the status-output
signals from the emergency back-up power
supply to the system. 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 a 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 check the operating instructions in the user
manual. E.g. The model SONAES requires to invert the NC and NO connections.
Figure 7 - Monitoring Inputs for the Backup Power
Supply
