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5.2.4. Terminals for EPO (emergency power off).
The UPSs have two terminals for the installation of an external
•
emergency power off (EPO) output button.
The device is dispatched from the factory with its EPO circuit
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set to closed (NC) by default. In other words, the UPS will cut
the output power supply, emergency power off, when the
circuit is opened:
Either by removing the female connector from the
ˆ
socket where it is inserted. This connector has a cable
connected as a jumper that closes the circuit (see Fig.
10-A).
Or by pressing the button external to the device belonging
ˆ
to the user installed between the terminals of the
connector (see Fig. 10-B). The connection on the button
must be in the normally closed contact (NC), so it will open
the circuit when activated.
The reverse functionality can be selected through the
communications software and control panel.
Except for specific cases, we advise against this type of
connection in view of the purpose of the EPO button, since it
will not act upon an emergency request if either of the two
cables that run from the button to the UPS is accidentally cut.
By contrast, this anomaly would immediately be detected in a
closed EPO circuit, with the inconvenience of an unexpected
cut in the powering of the loads, but a guarantee of effective
emergency functionality.
To recover the normal operating state of the UPS, it is neces-
•
sary to insert the connector with the jumper in its receptacle
or deactivate the EPO button. The device will be operationa.
A
Fig. 12. Connector for external EPO.
5.2.5. Communication port.
5.2.5.1. RS232 and USB port.
The communications line -COM- constitutes a very low
•
voltage safety circuit. To preserve the quality must be
installed separately from other lines carrying dangerous
voltages (power distribution line).
The RS232 and USB interfaces are useful for the monitoring
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software and updating the firmware.
It is not possible to use both the RS232 and USB ports at the
•
same time.
The DB9 connector supplies the RS232 signals and the
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normally open (NO) potential-free contacts using optocouplers.
The maximum voltage and current applicable to these contacts
is 30V DC and 1A.
Also, there is a «Shutdown» input that allows turning off the
inverter, when a voltage between 10 a 12 V is applied for 1
52
B
second at this input.
The RS232 port consists of the transmission of serial data in
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such a way that a large amount of information can be sent
through a communication cable with only 3 wires.
The USB port is compatible with the USB 1.1 protocol for com-
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munication software.
Pin #
Description
1
End of backup
2
TXD for RS232
3
RXD for RS232
4
GND for shutdown
5
GND for RS232
6
Common relays
7
Shutdown order
8
Low battery
9
Mains fault
Tab. 5. Pinout of DB9 connector, RS232.
5
1
9
6
Fig. 13. DB9 connectors for RS232 and USB.
5.2.6. Smart slot for the integration of an
electronic communication unit.
Optional electronic communication units include:
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Interface to relays to terminals, not programmable.
ˆ
SNMP adapter.
ˆ
Modbus RS485 adapter.
ˆ
The corresponding documentation is supplied with each
•
option. Read it before starting installation.
Installation.
Remove the protective cover from the device's slot.
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Take the corresponding electronic unit and insert it into the
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reserved slot. Make sure that it is properly connected, for
which it is necessary to overcome the resistance caused in the
connector located in the slot.
Make the necessary connections in the terminal block or
•
connectors available according to each case.
For more information, contact our
•
distributor.
Input / Output
Output
Output
Input
Earth
Earth
-
Input
Output
Output
2
1
3
4
T.S.S.
or our nearest
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