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ROC827 Instruction Manual
Issued Mar-06 Power Connections 3-24
Battery Reserve
Battery reserve is the amount of time that the batteries can provide
power without discharging below 20% of their total output capacity.
The battery reserve should be a minimum of five days, with ten days
of reserve preferred. Add 24 hours of reserve capacity to allow for
overnight discharge. Space limitations, cost, and output are all factors
that determine the actual amount of battery capacity available.
To determine the system capacity requirements, multiply the system
current load on the batteries by the amount of reserve time required, as
shown in the following equation:
System Requirement = Current Load in Amps * Reserve Hours = _____ Amp Hours
Caution
When using batteries, apply in-line fusing to avoid damaging the ROC827.
To make battery connections:
1. Perform the backup procedure described in “Preserving Configuration
and Log Data” in Chapter 6, Troubleshooting.
2. Remove the BAT+ and BAT– terminal block connector from the
socket.
3. Install a fuse at the input power source.
4. Insert each bared wire end into the clamp beneath the BAT+ and
BAT– termination screws (refer to Figure 3-5).
5. Screw each wire into the terminal block.
6. Review “Restarting the ROC827” in Chapter 6, Troubleshooting.
7. Re-apply power to the ROC827.
Note: Refer to Table 3-2 concerning LEDs.