Datasheet

S8BA
7
Engineering Data
Estimated backup time
The backup time varies depending on the capacity of connected devices.
After calculating the total capacity of connected devices, refer to the graph of the backup time to obtain an estimation of the initial value of the
backup time. (This is also applied to checking the battery.)
1. Convert the total capacity (power consumption) of the connected devices to watts (W).
For the indication of connected devices, check your computer and the rear of the display.
The indicator can show values in two different ways: amperes (A), and watts (W).
Example 1: 24 VDC, 145 W
Example 2: 24 VDC, 1.8 A
For devices that use the A indication, convert the capacity into W.
Example 2: 1.8 (A) = 1.8 × 24 (W) = 43.2 (W)
2. Add the values converted into W to obtain the total capacity of the connected devices.
3. Calculate the initial value of the backup time for the total capacity of the connected devices from the graph below.
• Graph of backup time (graph of initial values for products that have not been used at 25°C). The backup time becomes shorter than the graph
(table) below when temperature is lower.
• The smaller the capacity of connected devices becomes, the longer the backup time becomes.
Backup time table (Time unit: minutes)
Note: The above backup times are for reference only. They may change depending on the battery life and external environment (such as
temperature).
Indication Value
A W = A × 24
Capacity (W)
30 60 90 120 180 240 300 360 420 480
120 W 2914 9 6 ——————
240 W 58291915 9 6 ————
360 W 87 43 28 22 14 10 8 6 — —
480 W 119 59 39 29 19 15 11 9 8 6
120 W
480 W
360 W
240 W
Capacity (W)
Backup time (Minutes)
0480
120
100
80
60
40
20
0
60 120 180 240 300 360 420