20
Installation instructions
Installation and Programming manual
7.6
Connecting the batteries
The enclosure provides housing for two 12V lead batteries: 7 Ah for the SPS24040 model and 17 Ah for the
SPS24140 model. The two batteries must be connected in series, in such way as to supply 24 V.
Using the battery connection wire, connect the two batteries together then connect the batteries to the
power-supply module using the respective wire (included):
Figure 12 - Connecting the batteries
1. Connect the connection wire [A] to the two batteries.
2. Connect the wire [B] to the batteries.
Attention:
Ensure that cable polarity is correct.
3. Connect the battery wire connector [C] to the power-supply module.
Attention:
Ensure 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 battery-test circuit checks the efficiency of the batteries by simulating load current demand at 10
minute intervals. If the batteries fail to meet the load demand, the power supply station will signal a
Batt.discon.
fault.
Additionally, the efficiency of the batteries is gauged by the value of their internal resistance (in
compliance with EN54-4:1997/A2). If this resistance reaches 2 Ohm, the power supply station will signal
a “
Batt.inef.
” fault.
• Battery test
The battery-test circuit monitors the battery status (efficiency and charge) continuously. The battery-test
circuit can detect anomalies such as:
- A high charge voltage (“
Overload.
”). This is signaled when the battery charge reaches 30V (the test
will not be carried out during mains failure conditions).
- A low charge voltage (“
Underload.
”). This is signaled when the battery charge drops below 25V (the
test will not be carried out during mains failure conditions).
- In the event of mains failure, the power supply station will still monitor the battery voltage
continuously. If the voltage drops below 22.8 V, the power supply station will generate a “
Low batt.
”
event. The event will end when the voltage restores to 24.6 V.
A
B
B
C
A
D
