Minuteman UPS

From HwB



9 PIN D-SUB ??? at the UPS.

Pin Description
1 Unused
2 Battery power
3 Unused
4 Common (same as 7)
5 Low battery
6 RS-232 level shutdown
7 Common (same as 4)
8 Ground level shutdown (A500 and above, reserved on <A500)
9 Reserved

Pins 2 and 5 are connected to Common when they are true.
On pin 6, an rs-232 high level (>9V) will shutdown, when running off the battery.
On pin 8, shorting to ground will shutdown.