PowerWalker VFI 10000TCP 3_1 - Manual (Page 63)

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9. Communication Port
9.1 RS232&USB Interface
RS232&USB interface is for the monitoring software and firmware
update. There is only one option can work in the same time and same
product.
1) The following is the pin assignment and description of DB-9
connector.
2) The USB port is compliance with USB 1.1 protocol for its
communication software.
9.2 Intelligent Slot
This series is equipped with two intelligent slot for Webpower
(optional accessory) or other optional card to achieve remote
management of the UPS through internet / intranet. Please contact
your local distributor for further information.
9.3 AS400 Interface (Option)
Except for the communication protocol as mentioned above, this series
UPS has AS400 card (an optional accessory) for AS400 communication
protocol. Please contact your local distributor for details. The following
is the pin assignment and description of DB-9 connector in AS400 card.
Pin # Description I/O
2 TXD Output
3 RXD Input
5 GND Input