Allen-Bradley 1606-XLS960BUFFER, Reference Manual, Page: 10 / 24

10 Rockwell Automation Publication 1606-RM105A-EN-P - July 2020
Buffer Time
The buffer time (sometimes also called autonomy time) is the maximum
period for which the capacitor can maintain the required output current. The
buffer time mainly depends on the output current in buffer mode.
To increase the buffer time, any given number of buffer modules can be
connected in parallel.
Charging Time
The internal capacitors are charging when the LED status indicator is flashing
with a slow frequency (1.25 Hz).
Figure 7 - Charging Time, Recharging
Attribute Values Notes
Buffer time
Min 160 ms At 22.5V, 40 A
Min 320 ms At 22.5V, 20 A
Typ 250 ms At 22.5V, 40 A
Typ 500 ms At 22.5V, 20 A
Typ 62 s At 22.5V, 0.1 A
Figure 5 - Buffer Time, typ
Figure 6 - Buffer Time for Small Buffer
Currents, typ
Buffer Current, typ.
0
0 0.3 3 s
10
30
20
40 A
0.6 0.9 1.2 1.5 1.8 2.1 2.4 2.4
Buffer Time
Buffer Current, typ.
0
3 18 s
0.5
1.5
1.0
2.0 A
6 9 12 15
Buffer Time
Attribute Values Notes
Charging time
Min 29 s
Initial charging
(1)
(1) Initial charging is the first charge after voltage is applied to the
buffer module.
Max 50 s Initial charging
(1)
Min 24 s Recharging
(2)
(2) Recharging is the charging of the internal capacitors after
voltage interruptions shorter than 2 minutes.
Max 40 s Recharging
*2)
Charge
20
0 5 10 45 s
Charging Time
40
80
60
100%
15 20 25 30 35 40
max. min.
typ.