22
Installation instructions
Power supply stations
Figure 14 - Connecting the batteries
1. Connect the connection wire [A] to the two batteries.
2. Connect the wire [B] to the batteries.
Attention:
Be sure that cable polarity is correct.
3. Connect the terminal [C] of the battery wire to the proper connector of the power-supply unit (
Figure 9
- Switching power supply, [C]
).
Attention:
Be sure that connector polarity is correct.
The batteries are the secondary power supply of the system. The power supply station monitors the battery
status (efficiency and charge). The battery-test circuit of the power supply station operates as follows:
• Efficiency test
The station tests the battery efficiency every 10 minutes. If their internal resistance is over the allowed
limit, the event will be indicated “
Batt.fault
” on the display, according to the amendment EN54-
4:1997/A2.
• Battery level test
The battery-test circuit monitors the battery status (efficiency and charge) continuously.
In the event of mains failure, the power supply station will still monitor the battery voltage continuously.
If the voltage drops below 22.8V, the power supply station will generate a “
Low batt.
” event. The event
will end when the voltage restores to 24.6V.
• Deep discharge shutdown
If a mains failure event lasts for a long period, causing the battery voltage to drop below 18V, the power
supply station will shutdown the batteries in order to avoid permanent damage.
B
B
A
A
C
D
C
D
SPS24060G
power supply
C
D
SPS24160G
power supply
