Delta ASDA-A3 Series User Manual page 885

Absolute System
Battery life
10
Source: EVE Energy Co. ER14505 Discharge Characteristics
(1) The preceding figure illustrates the discharge current curves measured in the constant
current test. According to the five curves shown in the preceding figure, if the voltage of the
battery keeps at 3V or higher, the expected battery life is as shown in the following table.
Therefore, the lowest battery voltage level for an absolute encoder is set to 3.1V.
(2) The battery voltage can keep at 3.6V or above up to 5 years when the battery is stored in a
cool dry place.
Note:
1. The battery life expectancy is measured with a test using a servo drive, a motor, and a single battery.
2. The current consumption is nearly 0 when the absolute origin position is not established. Once the
absolute origin position is established, the battery power consumption starts. To avoid battery power
consumption when the machine is in transport, it is recommended that you disconnect the battery from
the servo drive or do not establish the absolute origin position.
10-4
Motor
ECM-A3 - A
ECM-B3 - A
ECM-B3 - P
ECMC- W
ECM-A3 - Y
ECMC- V
Current consumption *2
(μA) when the encoder
operates with the battery
30
45
35
Battery life expectancy
(month)
87.5
58.33
75
ASDA-A3