Rack mount Series UPS (1~3kVA) User ‘s Manual
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Table 2-1 Corresponding relations of pins for the RS232 serial ports of this series UPS
and those of general PC
:
Communication RS232 Interface for UPS General RS232 Interface
9 (3) 2 (Receive)
6 (2) 3 (Deliver)
7 (5) 5 (Ground)
Dry contact communication port pins definitions as Figure 2-9, signal definitions
as Table 2-2.
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Fig 2-9 Dry contact pins definition
Table 2-2 UPS Dry contact communication signal definitions
Status Dry contact signal description
Battery normal P1-P2 close, P2 –P3 open
Battery fault P1-P2 open, P2 –P3 close
Main normal P4-P5 close, P5 –P6 open
Main fault P4-P5 open, P5 –P6 close
UPS normal P7-P8 close, P8 –P9 open
UPS fault P7-P8 open, P8 –P9 close
Note: The normal status indicates that relay pulls, and the fault status indicates
that relay releases.
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