Honeywell Notifier Nfs28 Manual

997-492-000-6, Issue 6
July 201134
EN 54 & ISO 7240 2-8 Zone Conventional Fire Panel - Installation & Configuration Manual
8 Specification
General
The Fire Control Panel meets the requirements of EN 54-2/
4 and ISO 7240-2/4. See Section 1.4 CE Marking for further
details.
Mechanical:
Construction:
Fire-resistant, ABS plastic moulded front
cover and back box. Cover contains all
user interface controls and visual
indicators.
Dimensions (mm): 318(h) x 356(w) x 96(d)
Approx. Weight: 2kg (no batteries)...

997-492-000-6, Issue 6July 2011
35
EN 54 & ISO 7240 2-8 Zone Conventional Fire Panel - Installation & Configuration Manual
Electrical:
Classification: A combination of 
Installation Class 1
and Class 2 (panel must be earthed).
Conductor size: Compatible with cable conductor
sizes: 0.5mm
2 to 2.5mm2 .
Supply Rating:
Mains supply to the panel is to be provided via an external,
double-pole, mains-isolation unit. The supply rating is:
230V~ (ac) ±15%, 50/ 60Hz, 1.6A.
Power Supply Specification:
Input Fuse...

997-492-000-6, Issue 6
July 201136
EN 54 & ISO 7240 2-8 Zone Conventional Fire Panel - Installation & Configuration Manual
Outputs:
Sounder Circuits:
Two outputs configurable as sounder, fire routing output or
fault output and each rated at 0.5A. The sounder and fire
routing outputs are monitored.
18.0 - 28.5Vdc, (24Vdc nominal) rated at 0.5A.
Note: If the total alarm current (sounders + fire + Auxiliary output)
exceeds a total load of 1A, you must check the total
alarm load using the Battery Calculation...

997-492-000-6, Issue 6July 2011
37
EN 54 & ISO 7240 2-8 Zone Conventional Fire Panel - Installation & Configuration Manual
by EN 54-13. A fault of the 4-way sounder PCB is indicated
by the Auxiliary fault indicator. The following output options
are configurable:- Sounder output
- ÜE transmission circuit
- Fire protection output (SST)
- Fire routing output
- Fault routing output
The following input options are configurable: - Fire transmission confirmed
- Fault transmission confirmed
- Class change
- Day...

997-492-000-6, Issue 6
July 201138
EN54 & ISO 7240 2-8 Zone Conventional Fire Panel - Installation & Configuration Manual
9 Battery Calculation
The table in Section 6.4.1 Standby Batteries can be used
to select the correct battery size. If full calculations are
required use the procedure below.
General Data
PSU size Maximum Maximum Internal
No. of sounder External Battery Size
CircuitsAlarm LoadRange
  1.8A 2 1A 2.8 - 7Ah
Standby Load (Amps)
Standby Load in Amps No. Current Total
Basic panel1 0.034...

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