7.4 General Specifications
A7-6
ME0384-4A
Chapter 7 Simple Absolute Unit
7.4 General Specifications
[Absolute Battery Specifications]
Item Specifications
Type Cylindrical sealed nickel-metal hydride battery
Manufacturer FDK Corporation
Model AB-7
Nominal voltage 3.6 V
Rated capacity 3,100 mAh
Nominal capacity 3,700 mAh
Average life
Approx. 3 years (varies widely with operating conditions)
Weight 190 g
Charging time Approx. 72 hours
[Absolute Battery Charging]
Charge for at least 72 hours continuously if using for the first time, after replacing the battery,
and when power has been turned off for extended periods. The battery is charged while 24 VDC
is supplied to RCON.
If RCON power is turned OFF beyond the data retention time, the data will be lost, so charge
regularly.
The battery has a limited lifetime that gradually decreases data retention time. Replace the
battery when the retention time decreases significantly even if properly charged.
Data retention time (approximate time when battery is new)
Parameter
No.155
settings
Upper limit of encoder rotation speed when
power is OFF [r/min]
Battery
retaining
time
guideline
[days]
Retaining time
per 1 hour of
charge time
(guideline)
[h]
If connected actuator
is not RCA2-***NA
If connected actuator
is RCA2-***NA
0 100 75 20 6.6
1 200 150 15 5.0
2 400 300 10 3.3
3 800 600 5 1.6
For details, refer to "Startup Section Chapter 6, 6.1 Parameter (page B6-47)".
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