IAI America PCON-CA - Manual (Page 167)

Chapter 6
Absolute Reset and
Absolute Battery
POWER CON
PCON-CA/CFA
159
6.2 Absolute Battery
[1] For the Type to Attach Battery to Controller Side
Absolute battery and fabric hook-and-loop faster are enclosed in the simple absolute type
controllers.
The absolute battery is used to back up the absolute data.
Separate the faster and attach one on the side surface of the controller and the other on the
absolute battery. Join the 2 pieces of the faster, one on the controller and the other on the
battery, to affix the battery. Connect the battery to the absolute battery connector on the front
panel of the controller.
[2] When Using Absolute Battery Unit
Establish a connection between the absolute battery connector on the controller and the
connector for absolute battery unit connection with the dedicated cable (CB-APSEP-AB005).
6.2.1 Absolute encoder backup specifications
Item Specifications
Battery model AB-7
Battery voltage 3.6V
Current capacity 3300mAH
Reference for battery replacing timing (Note 1) 
Approx. 3 years
(It varies significantly by the effects of the
usage condition)
(Note 1) Replace the battery regularly.
6.2.2 Absolute Battery Charge
Please have the battery charged for more than 72 hours before using for the first time or after
replacing with a new one. The battery gets charged while the controller is supplied with 24V
power.
It is possible to retain the encoder data for the duration shown below for each hour of battery
charge.
Data holding time
Value for User Parameter No.155 0 1 2 3
Upper limit of encoder revolution at
power-OFF [RPM]
100 200 400 800
Data holding time per hour of battery
charge time (Note 1) (reference)
6.6H 5.0H 3.3H 1.6H
Holding time when fully charged (Note 1)
(reference)
20 days 15 days 10 days 5 days
(Note 1) Followings are the reference values of time assuming the battery is new.
Leaving the controller power OFF for more than the data holding time will lead to a loss of the
data. Have the battery charged as early as possible.
There is life to the battery and the duration for data holding will decrease. Replace the battery
with a new one if the retaining time is remarkably dropped even with enough charging time.