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6.4 Maximum current consumption and batteries
NOTE: If the amplifiers, used in the Voice Alarm system, are not powered from the same AC
mains as the Power Supply Equipment is powered from, a failure of the AC mains supply to the
amplifiers shall result into a fault warning to the voice alarm system!
Normal operating mode: the Power Supply Equipment recharges the batteries and maintains
them when they are fully charged. The maximum current that can be provided to all 9 user
outputs in total is 'Imax a'.
Back-up operating mode: the total operating current is provided by the batteries and may not
exceed 'Imax b mains not present'.
Imax a: maximum available current which may be drawn continuously while charging the battery.
Imax a = 12 A – C/20 (C/20 = charge current, C = battery capacity in Ah).
Imax b (mains present): maximum available output current which may be drawn a short time,
during which the battery may not be charged, but not discharged.
Imax b = 12 A
Imax b (mains not present): maximum available current which may be drawn from the batteries
when the mains supply is not available.
Imax b = 150 A if the jumper is set to '75' / Imax b = 100A if the jumper is set on '50'
See below picture for jumper setting:
The jumper is set to the '50' position as default factory setting. Any other position of the jumper
operates like '50' except the '75' position.
Back-up duration and battery size
To determine the battery size, look up the requirements for 'standby time' and 'emergency time'
in your local system/application standards. Do not forget to multiply the calculated battery
capacity by a safety factor (for capacity reserve and to compensate battery aging).
•
If Imax b (mains not present) is > 100 A, use batteries with a capacity of 86 to 225 Ah (max.) and
set daughter board jumper to '75'.
•
If Imax b (mains not present) is < 100 A, use batteries with a capacity of 65 to 225 Ah (max.) and
set daughter board jumper to '50'.
NOTE: is it not allowed to connect batteries in parallel to obtain a higher capacity. Only a series
connection of four (4) 12 V batteries (with a max. capacity of 225 Ah each) is allowed!
The following batteries have been tested with this battery charger and are approved to use:
• Yuasa NPL series
• Powersonic GB series
• ABT TM series
• Enersys VE series
6. Installation
Jumper
• Effekta BTL series
• Long GB series.
• Fiamm FG series
• Sun FT series
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