IV306E Rev. 004 Siel S.p.A.
Page 25 of 37 + 12 Tables, 14 F FR
Issued date: 2014-03-24
Insulation between the various contacts is only effective for voltages below 48Vac (60Vdc); in no
way can these contacts be used to switch the line voltage.
Connection of the EPO circuit
The UPS is equipped with an electronic device able to stop at the same time operation of the Rectifier,
the Inverter and the Static Switch, thereby interrupting power to the load in case of an emergency.
This device must be remotely activated by an emergency pushbutton; to restore normal operation, hold
down the appropriate pushbutton on the customer interface board.
It is important to be very careful to prevent the EPO circuit leads from running close to the power
cables.
The entire EPO circuit is without hazardous voltages and is metalically separated from the
internal voltages of the UPS; care must nevertheless be taken because this circuit stops the entire UPS
with consequent load supply loss!
Connection of the battery room temperature sensor (optional)
The connection leads of the temperature sensor must be connected as follows:
Sensor negative terminal: Terminal 1 of M4 (Figure 6)
Sensor positive terminal: Terminal 2 of M4 (Figure 6)
To carry out the connection it is necessary to push the white lever of the terminal block with a
screwdriver, introduce the stripped cable, and then release the lever.
It is important to pay attention to the sensor polarity: if this is connected wrongly it could become
damaged, and it would have no compensation effect on the recharge voltage.
This sensor can be used only if the battery cabinet is located close to the UPS.
In the event of the battery compartment being positioned a long way from the UPS or a separate
battery room being used, ask Siel S.p.A. for the optional optic fibre temperature sensor; with this
sensor a distance of over 50 m can be reached between battery room and UPS.
For other connections, refer to the "Remote signalling systems" section.
