Honeywell NOTIFIER AM-8000 - Page 32

AM-8000 Manuale di installazione PAGE - 29
AM8000_manu-inst Doc. 160.1-AM8000-ITA Rev A.3 NOTIFIER ITALIA
POWER SUPPLY – Current calculation
The power supply must be able to continuously power all the internal system devices (and all external devices)
during the stand-by period, that is in NON-alarm conditions.
- Use the table A to calculate the load in stand-by conditions.
- Use the table B to calculate the additional current which is necessary in Alarm conditions
A 24 Vcc internal power supply for a total of 4 Ampere is available on the power supply for the system operation
NORMALcondition ALARM condition
A B
Item Q Current each Total Current
(dev x Q)
Current each Total Current
(dev x Q)
AM-8000
CPU- 8000 115 mA 135 mA
LIB-8000 80 mA 90 mA
CAN-LCD-8000 25 mA 25 mA
LCD-8000-L
125 mA 230 mA
LCD-8000-F
165 mA 270 mA
Devices connected to Sounder
Output
1
0 0 |_________| |_________|
Loops
2
Current
Refer to Table 2
Loop 1 |_________| |_________|
Loop 2 |_________| |_________|
Loop 3 |_________| |_________|
Loop 4 |_________| |_________|
User Output current
3
(Max 1.5A ) (Max 1.5A)
LCD-6000
Bells 0 0 |_________| |_________|
Sounders 0 0 |_________| |_________|
Strobes 0 0 |_________| |_________|
Other devices |_________| |_________| |_________| |_________|
Total
4
= Total =
(x24h) or (x72h) = x 0.5 h =
Stand-by (A)
Ah
Alarm (B)
Ah
Ah Battery = (A + B) x 1.2
5
=
Ah
1 Check the load for each output is within admitted limits
2
Current from loops: Refer to the device manufacturer data sheet for the current necessary in normal mode.
Calculate the total current required for each loop by using the
table 2 (refer to the following).
Alarm current: Refer to the devices manufacturer’ data sheet for the current necessary in alarm mode.
Calculate the total current required for each loop by using the
table 2 (refer to the following) taking into account that the control unit controls
the activation
only of the first 6 sensor and input module LED in alarm
Check that the
total current for each loop is lower than 500 mA.
3 Refer to the device manufacturer data sheet for the current necessary in normal and alarm mode. Check that
the total current is lower than
1,5 Ampere.
4 The current request for the stand-by or alarm conditions cannot, in any case, exceed the power supply capacity. If the calculated current
exceeds the value of 4 Ampere, available at the power supply, the exceeding current, necessary during the Alarm condition, is drawn from the
batteries.
5 The sum of currents obtained must be multiplied by a 1,2 factor to take account of the battery manufacturing tolerances.