9 pin D-SUB male connector
|4||Common (same as 7)|
|6||RS-232 level shutdown|
|7||Common (same as 4)|
|8||Ground level shutdown (A500 and above, reserved on <A500)|
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.
9 pin D-SUB female connector