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22
en | The CPU Board
RS232 Serial Port
Pin
9
5 VDC & 12 VDC Power Input
The CPU board can be powered up by the 100~240 VAC input PSU.
Refer to Section 7 Power Supply Unit for further information before connecting any power
source to the CPU board.
Power Connector
Pin
1
2
3
4
5.1.1
Other Components
Lithium Battery Holder
This is the location where a 3V Lithium battery is situated. The Lithium battery provides
continuous power supply to the Real Time Clock circuitry in case of a power outage. The
power will only be drawn from this battery under the following conditions: -
–
–
Notice!
It is recommended that this battery be changed every 2 years. Recommended replacements
are the Panasonic Model CR2032 Lithium Battery for Axiom and A-Value CPU boards, or the
Varta Model CR2032 Lithium Battery.
Caution!
Batteries should only be replaced by a qualified service technician.
!
2018.11 | 1.0.6 | F.01U.122.796
Signal
RIB
Signal
+5V
GND
GND
+12Vcc
No power is supplied from the PSU, and
The external 12V rechargeable battery is not charged sufficiently, or is drained for prolong
period of time and unable to provide backup power.
Hardware Installation Manual
Pin
10
Access Easy Controller 2.1
Signal
-
Robert Bosch (SEA) Pte Ltd
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