P2 Pinout
Pin |
Function |
18 |
+5V |
23 |
-nc- |
25 |
-nc- |
27 |
-nc- |
22 |
Blue left TTL |
30 |
Blue right TTL |
16 |
Cable sense input |
6 |
GND |
7 |
GND (Serial) |
26 |
Green left TTL |
34 |
Green right TTL |
21 |
P3-2 (usb) |
19 |
P3-3 (usb) |
13 |
Pin 1 analog |
15 |
Pin 10 analog |
11 |
Pin 12 analog |
12 |
Pin 4 analog |
8 |
Pin 5 analog |
10 |
Pin 6 analog |
14 |
Pin 7 analog |
17 |
Pin 9 analog |
20 |
Q4 gate |
28 |
Red left TTL |
36 |
Red right TTL |
5 |
Serial CTS |
9 |
Serial RTS |
3 |
Serial Rx |
1 |
Serial Tx |
29 |
Trigger out TTL (U21 Port E.2) |
31 |
U26-2 (spare TTL out) |
2 |
USB opto+ |
4 |
USB opto- |
33 |
White left TTL |
35 |
White right TTL |
24 |
Yellow left TTL |
32 |
Yellow right TTL |
Note: The analog signals listed above are not active by default. They can be activated internally by adding 1206 SMT resistors in eight places (one for each signal). This is done this way to protect the internal circuitry from damage that could result if an external connection is made to this port which drives the pin as an input. (Only high impedance inputs should be connected to the analog pins.)