Rockwell Automation 1606-XLS240UPSD Power Supply Reference Manual - Manual (Page 12)

All parameters are specified at an input voltage of 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.
12 Rockwell Automation Publication 1606-RM017A-EN-P — February 2014
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.
“Battery Quality” or “State of Health” (SoH) test:
The battery has a limited service life and needs to be replaced at fixed intervals defined by the specified service
life (acc. to the Eurobat guideline), based on the surrounding temperature and the number of
charging/discharging cycles. If the battery is used longer than the specified service life, battery capacity will
degrade. Details can be found in section 26.1. The battery quality test cannot identify a gradual loss in capacity.
It is however able to detect a battery failure within the specified service life of the battery. Therefore a battery quality test
is 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 30 hrs, it is considered to be defective.
This could be due to a broken cell inside the battery.
During operation:
Once the battery is fully charged, a voltage drop test and a load test are performed alternately every 8 hours.
Three of the tests must consecutively produce negative results to indi cate 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 50 hours (with the largest size battery) 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. Battery tests require up t0 50 hours of untinterrupted operation. Any interruption in the
normal operation of the DC-UPS may induce the “Replace Battery” test cycle to start all over.
When “Replace battery” is indicated, we recommend replacing the battery as soon as possible.