IMO i3N Series, Руководство пользователя

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CHAPTER 8: BACK-UP BATTERY
The following information pertains to I3N i3 units running 14.24 firmware and later.
The I3N100/14004-SEHF and I3N100/08D12-SEHF use a 3.7 rechargeable lithium-ion battery.
The controller will not charge the battery when it is outside. Its charging range is typically -10°C to 35°C.
8.1 Overview
The has an advanced battery system that uses a rechargeable lithium battery. The battery powers the real
time clock when power is removed, and it is needed for register data retention.
8.2 Storing Register Contents
The i3 controllers with rechargeable batteries write register data to high-speed RAM when connected to
DC power. When this power is lost, critical circuits switch over and run-on batter power for about 1/10 of
a second. During this time, register and other retentive data is saved away to flash memory. The clock
continues to run on the battery at a much lower power. The battery is designed to last well over a year in
this state. Once power is restored, the battery recharges in eight (8) hours or less.
8.3 Battery Life
The battery is designed to last 300 full charges to 1000 partial charge cycles or 7 to 10 years. Because
typical operation does not drain the battery, the 1000 charge cycles should never be reached and the 7
to 10-year aging of the battery would limit its useful life. The battery is designed to be replaced.
8.4 Lithium Battery Safety
Many of the publicized battery issues are a result of using multiple batteries of flexible battery packs. The
i3 uses a small, single cell in a metal enclosure. The battery is UL recognized and comes from quality
suppliers. The i3 has safety circuitry built into the charging IC and additional external protection including
fusing. These circuits were closely evaluated by UL and IMO engineering for use in hazardous
environments.