Bosch Access Easy Controller Hardware Manual

Also see for Access Easy Controller: Quick installation

152 en | Power Supply Requirement and Connection Access Easy ControllerVer 2.0.0 | 2006.07 Hardware Manual Bosch Security Systems20 Power Supply Requirement and ConnectionThis chapter describes the power supply requirement for all the electronics within eachAccess Easy Controller enclosure and its connection.The design of the CPU Card is such that it can be powered externally through the Power Sup-ply Card by either one of the following means: -X An 18VAC input power source orX A 15VDC +/- 1% input power source.There are 2 variations of input power options for all Access Easy Controllers, either requiringan 18VAC or 15VDC input. UL Listed system will employ only the 18VAC input power, CEListed system will employ only the 15VDC input power.In order to provide uninterrupted power source to the CPU Card and Reader Boards during asupply outage, a battery charging circuit is incorporated in the Power Supply Card to chargethe backup rechargeable battery.When input power is present, the backup battery is trickle charged.20.1 Current ConsumptionThe table shows the current consumption of the various types of Cards.The indicated value for Reader Board and I/O Card is the total current consumption of all acti-vated relays.! WARNING!A 12VDC power supply is inadequate and will not be sufficient to charge the backup battery,although the Access Easy Controller system may work.i NOTICE!During battery backup, the 12V supply output from the power supply card is not guaranteed.It is because the voltage drop across the diodes will cause the 12V output to drop to 9-10VDescription. Average Current consumption (DC mA)CPU Card 1.35 A @ 5VDC4 Reader Board 140 mA @ 15VDC8 I/O Card, 140mA @ 15VDCSecure/Communication Card 36.5mA @ 5VDCConvertor Card 26.2mA @ 15VDC