ETT 771
BUILD-IN TOUCH TERMINAL
Page 16
15.07.2020
6
Buffer Battery
The exchangeable buffer battery ensures that the clock time (RTC) and SRAM data of the
ETT 771 are preserved in the absence of a supply voltage. A lithium battery is installed at
the manufacturer.
After delivery of the ETT 771 and storage of one year, the lifespan of the battery reaches 10
years. Assuming that the device is in operation (supply connected) most of the time.
We recommend however, that the battery be replaced every 8 years to ensure optimal
performance.
CAUTION:
If the device is not powerd for 2 years, the battery discharges completely.
Battery order number:
01-690-055
Company
Data
Lithium battery
RENATA
3.0 V/235 mAh
Use batteries from RENATA with the label CR2032 only!
WARNING!
Incorrect use of the batteries could result in fire or explosion! Do not recharge, dis-
assemble or throw batteries into fire!
Utilisez seulement des piles de RENATA CR2032!
ATTENTION!
La pile peut exploser si elle
n’est pas manipulée correctement! Ne pas recharger,
démonter ou jeter au feu!
When the battery voltage is in between the supervisor circuit thresholds it may happen that
the battery is detected "good" during operation but "low" after a power cycle. If this happens
it is recommended to replace the battery.
