Rockwell Automation 1606-XLS240-UPS Power Supply Reference Manual - Manual (Page 11)

All parameters are specified at 24V, 10A output load, 25°C ambient and after a 5 minutes run-in time unless noted otherwise.
It is assumed that the input power source can deliver a sufficient output current.
Rockwell Automation Publication 1606-RM036A-EN-P — April 2014 11
Bulletin 1606 Switched Mode Power Supplies
12. Check Wiring and Battery Quality Tests
The DC-UPS is equipped with an automatic “Check Wiring” and “Battery Quality” test.
“Check Wiring” test:
Under normal circumstances, an incorrect or bad connection from the battery to the DC-UPS or a missing (or blown)
battery fuse would not be recognized by the UPS when operating in normal mode. Only when backup is required
would the unit be unable to buffer. Therefore, a “Check Wiring” test is included in the DC-UPS. This connection is
tested every 10 seconds by loading the battery and analyzing the response from the battery. If the resistance is too
high, or the battery voltage is not in range, the unit displays “Check Wiring” along with the red LED. At the same time,
the green “Ready” LED will turn off.
“State of Health” (SoH) test:
The battery has a limited service life and needs to be replaced at fixed intervals determined by the specified service
life (acc. to the Eurobat guideline), based on the surrounding temperature and the number of charging and discharging
cycles. If the battery is used longer than the specified service life, its capacity will degrade. Section 26-1 contains additional
information on the topic. The battery quality test cannot identify a gradual loss in capacity.
However, it is able to detect a battery failure within the specified service life of the battery.
Therefore a battery quality test in included in the DC-UPS.
The battery quality test consists of different types of tests:
During Charging: If the battery does not reach the ready status (see section 14) within 30h, it is considered to be defective.
The culprit could be a broken cell inside the battery.
During Operation:
Once the battery is fully charged, a voltage drop and a load test are performed alternately, every 8 hours.
Three consecutive tests must produce negative results to indicate a battery problem.
A battery problem is indicated by the yellow LED (replace battery pattern) and the relay contact “Replace Battery.”
Please note that it can take up to 170 hours (with the largest battery size) until a battery problem is reported. This
should avoid nuisance error messages as any urgent battery problems will be reported by the “Check Wiring” test and
create a warning signal.
When “Replace Battery” is indicated, we recommend replacing the battery as soon as possible.