PowerWalker Battery Pack for VFI 1000RT LCD - Manual (Page 40)

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11.3 USB port
The UPS can communicate with a USB-compliant computer by using
HID-compatible power management software. To establish communication
between the UPS and a computer, connect the USB cable that comes with the
UPS to the USB port on the UPS. Connect the other end of the USB cable to
the USB port on a computer.
11.4 Installing a Serial Network Management Card (optional)
Each UPS has one available communication bay, which supports the optional
Serial Network Management Card. After you install a Serial Network
Management Card, you can connect an environmental monitoring probe to
the UPS.
Note: You do not have to shut down the UPS before you install a
communication card.
To install the Network Management Card, complete the following steps:
1. Locate the UPS communication bay.
2. Remove the two screws that secure the communication bay cover to the
UPS and save the screws.
3. Insert the Serial Network Management Card into the slot on the UPS.
4. Secure the Serial Network Management Card to the UPS with both
screws.
For more information about the Serial Network Management Card, see the
Serial Network Management Card User's Guide.
11.5 Dry Contact port
The UPS incorporates build-in single programmable relay output with
potential free contact for remote alarm indication: Dry out port; And
incorporates single signal input: Dry in port. See figure in the UPS rear
panel for the locations of the ports.
The relay output can be configured by protocol command setting, the
default output contact is “Summary Alarm”; The signal input to control UPS
On/Off status does not need to be configured, its function is the same as
one button to control UPS On/Off status.
Note: The relay output contact must not be connected to any utility
connected circuits. Reinforced insulation to the utility is required. The relay
output contact has a maximum rating of 30Vac/1A and 60Vdc/2A normal
values.