DB25 connector:

1- ch 9
2- ch 0 SZ
3- ch 2
4- ch 3
5 - ch 7
6- RS-232 out
7- ch 10
8- ch 12
9- ch 15
10- ch 17
11- RS-232 out
12- COMMON GROUND
13- +5 volts out (power a cell)
14- ch 1
15- ch 5
16- ch 8
17- ch 6
18- ch 4
19- ch 11
20- ch 13
21- ch 16
22 -ch 14
23- Output lopp of input power +5 to 15 volts
24- COMMON GROUND
25- Input of +12 volts to power timer

I would like to know the actual output (electrical pulse) from pin #2 (channel 0 - start). Does it deliver a positive (ex. from 0volts to + 5 volts) or negative pulse (ex. from + 5 volts to 0 volts) when the gate opens? What is the voltage delivered ? 1 volt? 5 volts ? ...

Thanks in advance,

RL