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9 pin D-SUB female connector layout
Разъем 9 pin D-SUB female
Best Power Fortress Rackmount 750 VA, 1050 VA, 1425 VA, 1800 VA, and 2250 VA communication port pinouts

DB-9 Pinouts

Pin
Number
Pin
Name
Description
1 RS232 Receive Data Receives incoming RS232 communication data.
2 RS232 Transmit Data Sends outgoing RS232 communication data.
3 Normally Open On-Battery Contact A normally open contact that closes 15 seconds (pulls to Common) after the UPS switches to battery power.
4 Signal Ground (Common) The signal ground for all signal pins.
5 Normally Open Low-Battery-Alarm Contact A normally open contact that closes (pulls to Common) during a Low Battery Alarm.
6 Plug and Play Sense for Windows 95 --
7 Remote Shutdown Connecting this pin to Common for at least 5 seconds, while the UPS is operating on battery, shuts the UPS off after 120 seconds.
8 Normally Closed On-Battery Contact A normally closed contact that opens (releases from Common) after the UPS switches to battery power.

Contacts consist of open collector circuits capable of switching up to +30 VDC, 6 mA resistive load.

Note1: for connection of this UPSes to the computer, using the proprietary closed software Best Power CheckUPS II Suite, is necessary the cable INT-0001  for smart signalling (CheckUPS II Advanced), or the cable INT-0051 for voltage signalling (CheckUPS II Basic).

Note2: for additional information how to connect this UPSes to the computer, using the open source software, please look APCUPSD Voltage Signalling Simple-Custom Cable for Best Power Fortress Rackmount 750 VA, 1050 VA, 1425 VA, 1800 VA, and 2250 VA.

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Источник(и) этой и дополнительной информации: http://lit.powerware.com/ll_download.asp?file=m_fortressrackmount_user_jan99.pdf , http://www.bomara.com/Best/checkups_spec2_eu.htm
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