JOVYTEC PE / PME
100000004673
- 12 -
5.1.9
RS-232 interface
The RS-232 interface adds further functions.
If, for example, the card slot is occupied (SNMP adapter etc.), the RS-232 interface may be used to output
external signals like those of a relay card. The 3 possible signals are listed in the table below (PIN 6 to 9).
Type: SUB-D9 socket
Pin no.
Signal name
Signal direction (in relation to UPS)
Function
2
TxD
Output
Transmit data
3
RxD
Input
Receive data
5
Common
----
Reference potential
6
Output
Grid failure signal
8
Output
Battery discharged signal
9
Output
12 VDC voltage
5.1.10 Interface (optional)
Remove this panel to slot in a relay card or an SNMP adapter.