Encoder Battery Life - Allen-Bradley Ultra1500 2092-DA1 User Manual

3. Identify the polarity of the new battery and its connector as shown in the
figure, and then slide the battery into the drive.
4. Affix the connector as shown in the figure, and close the BATT
compartment door.
5. If this is a new installation, make sure that the Encoder Backup Battery
parameter is set to Installed in the Encoders window of Ultraware.
6. If this is a new installation or if a battery low voltage fault occurred, the
axis must be homed to establish the absolute reference position for
motion.
Instead of using the battery compartment of the Ultra1500, an external 3.6V
battery can be connected to pins 25 and 49 of the CN1 connector of the
Ultra1500 drive. This method allows a potentially larger capacity battery to be
used, for example if extra long battery life is desired.

Encoder Battery Life

The absolute encoder used in the TL-Series motors requires a small amount of
current from the battery. When the control power is not present in the drive,
the only encoder power is from the battery and the current draw is
approximately 100A. The current draw is substantially less when the control
power of the drive is applied, and is typically less than 10A. Therefore, the
expected battery life will depend on the amount of time that the drive has
control power applied, as shown in Figure 5.5.
Ultra1500 Application Examples
Publication 2092-UM001D-EN-P — July 2005
5-17