Interfaces
Linear Plus Series UPS User Instruction Manual
27
Serial Interface COM 3
The 9-pole SUB-D connector (pin contacts) contains RS232 compatible signals.
NOTE:
The interface COM 3 is electrically isolated from primary UPS circuits.
Fig. 16: Serial Interface RS232
Interface Slot COM
The interface slot COM can be fitted with various optional interface cards.
Optional interface cards include:
• SNMP-adapter (ManageUPS
NET
) for connecting the UPS to a network,
• Isolated contacts card.
Installation instructions are included with each card.
Table 12. RS232 Pins
Pin 2
RxD (receive RS232 compatible signals)
Pin 3
TxD (transmit RS232 compatible signals)
Pin 4
not used
Pin 7
not used
Pin 8
not used
Pin 1
not used
Pin 9
not used
Pin 6
not used
Pin 5
SGN (signal ground for pins)
