SDU Series Instruction Manual • 11
English version
8.0 PIN-Out Configuration for DB9 Connector
Female Connector PIN No.
RS-232 Signal
Open Collector Signal
1
---
---
2
TX
---
3
RD
Remote shutdown
*
4
DTR (+12 V)
---
5
GND
GND
6
---
Ac failure
7
RTS (-12 V)
---
8
---
Battery low
9
TX
---
DTR = Data terminal ready
RTS = Request to send
RD = Transmitted data
GND = Signal Ground
TX = Received data
*
When a remote shutdown signal is applied for one second, the UPS will shut down in three minutes.
9.0 Battery Backup Times
SDU 500, SDU 500-5
SDU 850, SDU 850-5
VA/Watts
500/300
850/510
Battery
YUASA NP7-12
YUASA REW45-12
Load Level
Backup Time (Minutes)
Backup Time (Minutes)
10%
130
80
20%
55
37
30%
36
20
40%
23
13
50%
18
10
60%
13
7
70%
10
5
80%
9
4
90%
6
3
100%
5
2.5
