Power Availability - Cooper Security i-on 40 Installation Manual

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Figure 7 Keypad Rear Housing
1. Central keyhole.
2. Rear tamper shroud.
3. Cable entry.
4. Fixing holes.
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ET B A 12V 0V
4a
4b
BACKLIGHT
Figure 8 Keypad PCB
1. Sounder.
2. Sounder volume control.
3. Tamper switch.
4. Jumpers for addressing and LED function:
4a Addressing
4b LED functions
5. RS485 termination jumper
6. Connector for control unit (note that the ET
terminals are inactive).
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ABCD-ON
ON
BRIGHT
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Power Availability

Before connecting any external devices to
the control unit, you must make sure that
the control unit can provide sufficient
current to power the system during a mains
failure for the time required to meet Grade
2 PD6662 or EN50131-1. The standard
requires 12 hour standby, which includes
two periods of 15 mins in alarm.
The amount of current available from the
control unit depends on the battery fitted.
The current taken by the control unit pcb,
communicator and keypads is given in
Technical Specifications on page 22.
For example: in an alarm system with an i-
on40 control unit, two i-kp01 keypads, and
15 wired PIRs the system takes the
following total quiescent current:
Device
Control unit PCB
15 x PIRs at 15mA each
i-sd02 communicator
(quiescent)
2 x i-kp01 at 30mA each
(backlights off)
Siren (quiescent)
During an alarm, these figures become:
Device
Control unit PCB
15 x PIRs at 15mA each
i-sd02 communicator
2 x i-kp01 at 30mA each
(backlights off)
Ext Siren & Strobe
The total amp hours required =
(0.460A x 11.5h) + (0.955A x 0.5h) =
5.77Ah
A fully charged 7Ah battery can provide this
amount of charge.
In this example a 7Ah battery should
exceed the Grade 2 requirements.
Note: All current drawn from the Aux
terminals (12V and 14.4V) must be
included in the overall calculation..
i-on40
Current
130mA
225mA
20mA
60mA
25mA
Total 460mA
Current
220mA
225mA
50mA
60mA
400mA
Total 955mA