ONEAC Sinergy UPS User Manual
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6.2 Optional Interface COM B
The optional interface COM can be equipped with various interface cards. The designation beside the plug
then depends on the type of interface card.
In the following the function of the interface signals for version COM B is described. The optional interface
COM B provides potential-free signalling contacts and a shutdown input and an insulated auxiliary supply.
Fig. 28:
Simplified Schematic of Interface Connections
Table 5. Interface COM A
Pin Number
Condition
SGN at pin 5
This connection point serves as a reference for all signals.
RXD at pin 2 and TXD at pin 3
In conforms standard RS232 configuration.
INV SHUTDOWN at pin 2
This input (pin 2: High 5V...+12V, t
≥
1 second, pin 5: 0V) enables the control
processor to switch off the UPS in the event of a mains failure. After the mains has
been reestablished, the UPS starts again independent of this signal status.
BATTERY LOW at pin 1
This output goes low, when the battery can supply current for approximately 3 more
minutes at nominal load.
AC FAIL at pin 9 and
AC FAIL at pin 6
Pin 9 goes low and pin 6 goes high for mains voltage failure at the UPS input for a
minimum of 10 seconds or when the mains voltage moves beyond the tolerance
band. The signal is reset 850 ms after the mains have been reestablished.
BYPASS ACTIVE at pin 7
This signal goes low after switching over to bypass, blocking the inverter and the
energy being supplied by the mains
SUM ALARM at pin 8
This output is low, when one of the alarms “BATTERY LOW”, “AC FAIL” or “BYPASS
ACTIVE” is given.
