Appendix A: Power Supply Calculations
The Main Power Supply
74
AFP-100/AFP-100E Instruction PN 51010:C1 02/06/2002
Table 15 Filtered Load in Alarm
Device Type
Number of
Devices
Alarm
Current
(amps)
Total Current
1
(amps)
1. Current limitations of terminals:
TB4 Nonregulated terminals = 2.5 amps
TB4 Nonresettable terminals = 0.3 amps
TB4 Resettable terminals = 0.3 amps
TB1 and TB2, any one circuit = 2.5 amps
Total current draw from all terminals cannot exceed 3.6 amps with standard transformer installed;
6.0 amps with both standard transformer and optional XRM-24 (XRM-24E for 220/240 VAC
applications) transformer installed. Note that total current from TB4 Nonresettable and Resettable
terminals must not exceed 0.600 amps.
Main Circuit Board
1
X
0.168
=
0.168
RTM-8F
[ ] one max.
X
0.146
2
2. All RTM-8F Relays activated.
=
ACM-8R
[ ]
X
0.158
3
3. All eight ACM-8R Relays activated on a single module.
=
AFM-16AT
AFM-32A
[ ] one max.
X
0.056
4
4. All annunciator LEDs on.
=
AEM-16A
AEM-32A
[ ]
X
0.018d
=
AFM-16AT
AFM-32A
[ ]
X
0.056
4
=
AFM-16A
[ ]
X
0.065
4
=
UDACT
[ ] one max.
X
0.075
5
5. UDACT actively making phone call to Central Station. If the normally open contact is used, current
consumption increases to 100 mA.
=
LDM-32
[ ]
X
0.056
6
6. LDM-32 with LEDs on
=
LDM-E32
[ ]
X
0.018
=
LCD-2X20 Series
[ ]
X
0.066
7
1 ' &2&'#3#40 /
-
=
4-Wire Smoke Detector
[ ]
X
[ ]
=
Power Supervision Relay
[ ]
X
[ ]
=
Addressable Devices
maximum draw
for all devices
X
0.2
8
8. Monitor Module current-limited at 90 mA in alarm.
=
0.2
Notification Appliances
[ ]
X
[ ]
=
Auxiliary Devices Powered
from TB4
[ ]
X
[ ]
=
Sum Column for Alarm Load
Amps
9
9. This column must not exceed total system current draw of 6.6 amp.
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