PowerWalker VFI 6000T LCD - Manual (Page 55)

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9. Communication Port
9.1 USB Interface
The USB port is compliance with USB 1.1 protocol for its communication
software.
9.2 Dry contact Interface
This series UPS has independent dry contact interface. Please contact
your local distributor for details. The following is the pin assignment and
description of DB-9 connector.
Pin # Description I/O Pin # Description I/O
1 UPS Fail Output 6 Bypass Output
2 Summary Alarm Output 7 Battery Low Output
3 GND Input 8 UPS ON Output
4 Remote Shutdown Input 9 Line Loss Output
5 Common Input
9.3 RS-232 Interface
（ （ （ （
optional
） ） ） ）
The RS-232 port is available for UPS monitoring, control, and firmware
updates.
The cable pins for the RS-232 communication port are identified in the
following illustration.