MPC-6000 / MPC-7000 / RND-2 INSTALLATION, OPERATION AND MAINTENANCE MANUAL
63
Total System Currents
STANDBY (A) ALARM (A)
Total Panel & Modules current
Total Auxiliary current + +
Total Device current + +
TOTAL PANEL+ Modules + DEVICES (Note 2)
Use the Total Panel+ Modules + Devices for the Battery Size Calculations
Battery Size
Total Standby
Current
(from above)
Hours of Standby Required
per NFPA 72 Standard
(4, 24 or 90)
AH for Standby
(Note 3, 4)
A. x ____ Hours =
Total Alarm Current
(from above)
5 Minutes of Alarm
Operation
per NFPA 72 Standard*
AH for Alarm
(Note 3, 4)
A. x 0.09 Hours =
A.H. for
Standby
A.H. for
Alarm
Calculated
A.H.
De-rating
Factor
A.H. Required
Battery
Capacity
+ = X 1.25 =
Notes:
1. An additional multiplier is included to compensate for the higher discharge rate in alarm. Battery capacity
decreases with age.
2. The Standby current + Alarm current for an MPC-6000 must never exceed 3.0 Amps when using the two
supplied transformers and 6.0 Amps when using the supplied transformers and the NPE-1 optional
transformer assembly.
The Standby current + Alarm current for MPC-6000 with releasing must never exceed 3.0 Amps when
using the two supplied transformers. The MPC-REL releasing circuit and open collectors must never
exceed 3.0 Amps using the supplied RPT-1 transformer.
The Standby current + Alarm current for an MPC-7000 must never exceed 5.0 Amps when using two
supplied transformers and 8.0 Amps when using the supplied transformers and the NPE-1 optional
transformer assembly.
The Standby current + Alarm current for an RND-2 must never exceed 0.9 Amps when using the supplied
transformer assembly.
3. The following states the maximum standby current allowed for a MPC-6000 / RND-2 panel using a 38 AH
battery set:
90 hours of standby time is 0.320 Amps
24 hours of standby time is 1.144 Amps
4. The following states the maximum standby current allowed for a MPC-7000 panel using a 100 AH battery
set:
24 hours of standby time is 3.22 Amps
5. Does not include lamp or LED current, add separately. Refer to installation instructions P/N 315-447345
for maximum activated current rating of individual drive circuits.
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