ABOUT LEDS
May 2, 2011
NiMH battery pack
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JACE-700 MOUNTING AND WIRING GUIDE
Part Number 11694 Rev 1.6
27
with a completely discharged battery. Therefore, allow at least 18 hours
for the battery to charge if it has not been in a powered unit.
You should replace the NiMH battery pack approximately every three years, or more
often if the unit is in a high temperature environment. For more information on the
use and replacement of the battery, refer to the
Backup Battery
The optional sealed lead-acid backup battery is an external, 12V, rechargeable
battery (or multiple batteries) sized to operate the system during loss of primary
power, for some duration. This includes the controller, as well as power to attached
I/O expansion modules.
You connect the backup battery to the controller using a 2-position connector—see
on page 24. Whenever primary-powered, the controller supplies a
constant “trickle” charge to this battery, at 200mA maximum. At startup (boot), a
test of the backup battery is performed, as well as a periodic test. A system alarm is
generated if a battery test deems the backup battery to be bad.
Providing that the backup battery has tested good, upon loss of primary power the
system operates from this backup battery power until the charge level of the
on-board
reaches 0. Note that both batteries discharge in
parallel. However, as the sealed lead-acid backup battery capacity is much greater,
the
discharges much slower than if these backup battery(ies)
were bad or not present.
Note
If the backup battery test was “bad,” upon loss of primary power, the
controller performs an immediate shutdown, backing up data and
powering off (including attached expansion modules).
You should replace the sealed lead-acid backup battery(ies) approximately every
three years, or more often if the unit is in a high temperature environment.
About LEDs
The JACE-700 provides a number of LEDs on its main board, of which only the
Status and Heartbeat LEDs are visible on the cover. Checking other LEDs requires
first removing the cover.
LEDs include the following types:
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•
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For the location of LEDs on the main board, see
