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Section 400: Communication
FERRUPS is capable of full-duplex communication, so it can communicate with a computer, a Local Area
Network, or a multi-user computer system. If your system comes with UPS monitoring and automatic shutdown
software, FERRUPS can communicate with that software. If your system does not have software, you can use the
CheckUPS II Suite power management software included with your FERRUPS. CheckUPS II does an orderly
automatic shutdown of protected equipment and the UPS when there is a long power outage. CheckUPS II also
provides UPS monitoring and control from your computer. For more information, see the CheckUPS instructions
and the online CheckUPS manuals.
If you do not plan to use CheckUPS II or your own UPS monitoring software, you can still set up RS232
communication with your UPS and use commands and parameters to control UPS operation. Section 401
explains how to connect a terminal or computer to the FERRUPS’ communication port to communicate with
FERRUPS. Section 402 describes the commands that you can enter from a terminal or computer.
Section 403 describes the other functions that you can access through the RS232 port: remote monitoring and
remote shutdown.
The diagram below shows the functions of the pins at the FERRUPS communication port.
Pin Description
2 Transmit Data (In).
3 Receive Data (Out).
4 Request to Send. To enable hardware handshaking on these
pins, call your local Best Power office.
5 Clear to Send.
6 +12V Level (0.01 amp) when UPS is operating.
7 Signal Ground.
11 Contact opens when on inverter. These relay contacts are rated at 25V AC/DC
and 250 mA. (Later models may have
equivalently rated DC solid state switches.)
See Section 403.
12 Contact closes when on inverter.
13 Common Inverter Signal Contact.
14 +12V, 0.5 amp (500 VA-3.1 kVA) or 0.3 amp (4.3-18 kVA). Do not use for setting
logic levels.
18 +12V Level (0.01 amp) when UPS is operating.
20 AS/400 Option.
21 Remote Shutdown.
23 Contact closes on alarm. These relay contacts are rated at 25 V AC/
DC, 250 mA. (Later models may have
equivalently rated DC solid state switches.)
Pins 23 and 25 change status when UPS is
turned off. See Section 403.
24 Common Alarm Signal Contact.
25 Contact opens on alarm.
Note that pins 2-5 and 7 are for RS232 communication, pins 11-13 and 23-25 are for remote monitoring, and pin
21 (used with 6 or 18) is for remote shutdown. The sections below will tell you more about how to take
advantage of these features. Pin 20 is for option use only.