Sendon UPS-500 dumb cable
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Sendon UPS-500 dumb cable

pinout

Part# M2501. Should work with RUPS for DOS/Windows software

9 pin D-SUB male
9 pin D-SUB male connector  to the UPS
UPS
Signal Name
DB-9 Male
(UPS end)
DB-9 Female
(PC end)
PC
Signal Name
AC Fail28CTS, connected by R 1k8 to pin 7(RTS)
Batt Low51DCD, connected by R 1k8 to pin 8 (CTS). Connected by R 1k8 to pin 7(RTS)
Shutdown6R=10k, 4DTR
Common4,73TxD

9 pin D-SUB female
9 pin D-SUB female connector  to the computer

Source:www.pinouts.ru


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