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42
en | Power Supply Unit
The PSU in AEC2.1 will consume a 100~240 VAC input power. In order to provide
uninterrupted power source to the system during a supply outage, a battery charging circuit is
incorporated to charge the backup rechargeable battery. A 7Ah battery is needed for a 4 hour
standby as required by UL294. When input power is present, the backup battery is trickle
charged.
Warning!
There is a danger of explosion if the battery is incorrectly replaced. Replace only with the
!
same type recommended. Refer to Appendix D Selecting A Correct Battery Size, page 111 for
information on backup battery.
8.4
Current Consumption
The table below shows the current consumption of the various types of boards.
Description
CPU board
4-Reader board
8-IO board
The indicated value for 4-Reader board and 8-IO board is the total current consumption of all
activated relays.
The data in the table are meant to be use as a general guide. It is the responsibility of the
system installer to determine the actual current consumption of the hardware that the
external battery is to support in order to provide continuous supply for a known period.
TIP: If a longer Backup time is desired, it is recommended that all the Readers take its supply
from another external PSU with its own back-up battery.
For system that could not be contained within the Main Enclosure, such as a 10-Door AEC2.1,
additional Extension unit is added. In such case, the supply to the cards in the Extension
unit(s) are provided via its own PSU in the enclosure.
Notice!
The table only takes into consideration the current consumption of the CPU, 4-Reader boards
and 8-IO boards and does not include current consumption of the locks and the readers for
each door. In practice, a separate power supply is used to provide supplies to Locks.
8.5
Connection in the Main Controller
The Main Controller is powered by the 100~240 VAC Input PSU. The 13.6 +/- 0.1 VDC output
from the PSU is designed to supply power to all relays in all the interface boards, within the
Main Controller Enclosure. However, when additional interface boards are installed in
Extension unit/s, separate PSU must be installed, and the current ratings of these power
supplies must be computed to be adequate
2018.11 | 1.0.6 | F.01U.122.796
Average Current consumption (DC)
1.35 A @ 5 VDC
280 mA @ 12 VDC
280 mA @ 12 VDC
Hardware Installation Manual
Access Easy Controller 2.1
Robert Bosch (SEA) Pte Ltd
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