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Secondary Power Source Requirements
58
XP Series Transponder PN 15888:G 6/11/98
Table 6 Filtered Power Requirements (Activated) @ 24 VDC
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Table 7 calculates the total current required of the Main Power Supply during an
activation of outputs condition. Refer to “The Filtered Supply” section of this appendix
for power limitations.. The MPS-24A/MPS-24AE and MPS-24B/MPS-24BE provide
filtered supply for notification appliance circuits, permitting the use of 24 VDC
notification appliances UL listed for Fire Protective Signaling. Enter in Table 7 the
respective current draws of notification appliances and other external devices to be
powered by the MPS-24A/MPS-24AE or MPS-24B/MPS-24BE when activated.
Table 7 Total Filtered Activated Output Requirements @ 24 VDC
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During loss of primary AC power, the secondary power source (batteries) must be
capable of supplying the XP Transponder's internal needs for 24 or 60 hours, and the
external needs for 5 minutes. Use Table 8 to calculate the internal power requirements
of the batteries during an inactivated state. Use Table 9 to determine the activated state
load on the secondary power source and Table 10 to determine the size of the batteries,
in ampere hours, needed to support the system for the required number of hours.
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Device Type
# of
Devices
Current Draw (amps)
Total Current/
Device
XPP-1 relays
[ ]
X
0.009
=
XPM-8 zones
[ ]
X
0.022
=
XPM-8L zones
[ ]
X
0.03
=
XPC-8 circuits
[ ]
X
0.009
=
XPR-8 relays
[ ]
X
0.009
=
4-wire smoke detectors
[ ]
X
Alarm current draw
=
Sum Column for Current Load
=
amps
Device Type
# of
Devices
Current Draw
(amps)
Total Current/
Device
Bells
[ ]
X
[ ]
=
Horns
[ ]
X
[ ]
=
Sounders
[ ]
X
[ ]
=
Strobes
[ ]
X
[ ]
=
Flashing lights
[ ]
X
[ ]
=
Other devices drawing power
from TB3 term. 3 & 4 of the
MPS-24A/MPS-24AE or TB2
term. 3 & 4 of the MPS-24B/
MPS-24BE
[ ]
X
[ ]
=
Current Load (From Table 5)
=
Current Load (From Table 6)
=
Sum Column for Current Load
=
amps
