LACROIX Sofrel S4W - Power Balance and Battery Life Calculation; Average Power Consumption Table; Battery Operating Time Calculation

Power balance
Battery life
The table below summarises the average consumption measured at ambient temperature (25 °C):
S4W article
Unitary
consumption
- S4W Compact
2.9
W
- Ethernet connection
0.2
W
- GSM modem in standby
0.2
W
- RS232 module
0.02
W
- EDF module
0.02
W
- RS485 module
0.02
W
- RDRTU-2 module
(
∗
)
0.22
W
- RS485i module
0.1
W
- DL module
0.05
W
- BADGE Module + Reader
ProxKey III - RFID 125 kHz
0,47
W
- BADGE Module + Bluetooth Reader
Mobile Access – Seos
1,3
W
- 1 DI
0.03
W
- 1 AI-mA
0.4
W
Calculation formula:
Operating time (in h) = 13.8 (V)
∗ 80 % of battery capacity (12Ah)
_____________________________________
Average power (W)
Configuration example:
Compact case
(Ethernet, GSM)
RS232 RS485 RDRTU-2 8 DIs 2 AI-mA Total (W)
3.3 0.02 0.02 0.22 0.24 0.8 4.6
In the example given, S4W remote terminal unit consumes 4.6 W; the battery life is therefore 28.8 hours.
(
∗
)
: Only available in countries where 869MHz frequency is allowed, check with country’s regulations.