Johnson Controls IFC-1010 Technical Manual page 57

Table 9: MPS-24A or MPS-24AE Main Power Supply Loads (Regulated, Filtered
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Supply)
Condition Maximum
Supply Load
(All Circuits)
Non-Fire 3.0 amperes
Alarm with
Battery
Charger
Enabled
6.0 amperes
Non-Fire
Alarm with
Battery
Charger
Disabled*
Fire Alarm 6.0 amperes
Notes: *JP1 must be cut to install either a NR45-24/E remote battery charger and disable either the MPS-24A/E
internal charger.
Internal
External 1
External 2
Remote Battery JP1 must be cut to install either a NR45-24/E or CCHG-120 remote battery
Charger
Maximum
Circuit Load
(Per Circuit)
3.0 amperes
1.0 ampere
3.0 amperes
nonresettable
2.0 amperes
resettable
3.0 amperes
1.0 ampere
3.0 amperes
nonresettable
2.0 amperes
resettable
3.0 amperes
1.0 ampere
3.0 amperes
nonresettable
2.0 amperes
resettable
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This power is used for internal requirements modules, boards, etc.
Connection: Power harness from MPS-24A/E P2 or P4 to the CPU.
Provides resettable power to 4-wire smoke detectors (and power supervision relays).
Connection: TB3 1 (+) and 2 (-).
Power for any 24 VDC UL-Listed device (typically notification appliances).
Connection: TB3 Terminal 3 (+) and 4 (-).
charger and disable the MPS-24A/E internal charger.
Circuit Type Description
(See Notes)
Internal 3 amperes of the power supply capacity
are reserved for the battery charger when
External 1
enabled. The remaining 3 ampere capacity
External 2
can be shared between the internal and
external circuits during a non-fire alarm
condition.
Internal When the internal MPS-24A/E battery
charger is not used, the full 6 ampere
External 1
capacity of the power supply can be shared
between the internal and external circuits
External 2
for up to one hour (4 amperes
continuously).
Internal During a fire alarm condition, the battery
charger is automatically disabled, which
External 1
makes the full 6 ampere capacity of the
External 2
power supply available to be shared
between the internal and external output
circuits for up to one hour
(4 amperes continuously.)
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Hardware Installation—Installing the IFC-1010/2020
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57