Chaparral K5312/K7313 - Manual (Page 21)

Introduction
1-11
Environmental (K-Series)
Table 1-7 shows the environmental specifications of the controllers.
A/D Monitoring ± 8.0% normal operation
11.04 Vdc to 12.96 Vdc
± 10.0% degraded mode (warning alert)
(10.8 Vdc) (13.2 Vdc)
>± 10.0% controller shutdown (failure)
14.4 Vdc
Battery 0.4 A max charging current
0.04 A typical trickle charge current (normal
operation)
A/D Monitoring Internal thermocouple in battery pack monitored
Warning issued if pack exceeds temperature range
(5
o
C to 45
o
C)
Write back cache remains enabled during battery
pack thermal warning
Table 1-7. Environmental Specifications
Item Specifications
Reliability K5312 Main Board: MTBF = 200,000 hours
K7313 Main and Fibre Boards: MTBF = 140,000 hours
CPU Fan = 37,523, MTTF = 4.3 years
Battery = 26,300, MTTF - 3.0 years
Note: Battery life is probably higher based on duty cycle, battery
stress is primarily during re-charge activity if battery backup is
activated.
Temperature 5
o
C to 45
o
C normal operating range with unobstructed airflow
0
o
C to 5
o
C and 45
o
C to 50
o
C degraded mode operating range
-40
o
C to +100
o
C non-operating/storage (without battery pack)
5
o
C to 25
o
C non-operating/storage (with battery pack)
Table 1-6. Electrical Specifications
Item Specifications