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MP500/4N-8-16 Installation
4 - DESIGN: CALCULATIONS AND TESTS
4.1
SIZING OF THE POWER SUPPLIES AND THE BATTERIES
All the tests and calculations to be carried out in order to ensure that the power supplies and batteries to be installed are capable of
powering all the devices for the period of time specified by standard EN50131 are illustrated below.
4.1.1 Battery sizing
The system must be sized so as to guarantee, in case of a blackout, the minimum time of autonomy required by standard EN50131,
depending on the selected grade of security. Therefore, in order to guarantee minimum duration of the battery, the system powered
directly by the control panel must comply with the following requirements.
MP500/4N control panel with 7.2 Ah battery
EN50131
Communicator
used
Autonomy
Absorption allowed
Control panel
All the devices
powered by the
control panel
Total
Grade 2
ATS2
12 hours
75 mA
375 mA
450 mA
MP500/8 control panel with 7.2 Ah battery
EN50131
Communicator
used
Autonomy
Absorption allowed
Control panel
All the devices
powered by the
control panel
Total
Grade 3
ATS4
60 hours
Configuration not possible
Grade 3
ATS4
30 hours*
85 mA
135 mA
220 mA
Grade 2
ATS2
12 hours
85 mA
365 mA
450 mA
MP500/16 control panel with 18 Ah battery
EN50131
Communicator
used
Autonomy
Absorption allowed
Control panel
All the devices
powered by the
control panel
Total
Grade 3
ATS4
60 hours
85 mA
175 mA
260 mA
Grade 3
ATS4
30 hours*
85 mA
435 mA
520 mA
Grade 2
ATS2
12 hours
85 mA
1065 mA
1150 mA
(*) the time of autonomy can be halved to 30 hours if the system is remotely assisted with a guarantee of intervention in case of
blackout.
Table 4 - Control panel battery autonomy
The power supply for all internal circuits and devices is provided by an internal switching power supply.
The use of a 12 V lead-acid rechargeable battery is envisaged.
The battery to be used must:
Type VRLA (Valve Regulated Lead Acid)
Casing: UL94V-1 or higher flammability rating
Comply to IEC 60896-21: 2004, IEC 60896-22: 2004