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P2 Pinout

Pin Function
1 Serial Tx
2 USB opto+
3 Serial Rx
4 USB opto-
5 Serial CTS
6 GND
7 GND (Serial)
8 Pin 5 analog
9 Serial RTS
10 Pin 6 analog
11 Pin 12 analog
12 Pin 4 analog
13 Pin 1 analog
14 Pin 7 analog
15 Pin 10 analog
16 Cable sense input
17 Pin 9 analog
18 +5V
19 P3-3 (usb)
20 Q4 gate
21 P3-2 (usb)
22 Blue left TTL
23 -nc-
24 Yellow left TTL
25 -nc-
26 Green left TTL
27 -nc-
28 Red left TTL
29 Trigger out TTL (U21 Port E.2)
30 Blue right TTL
31 U26-2 (spare TTL out)
32 Yellow right TTL
33 White left TTL
34 Green right TTL
35 White right TTL
36 Red 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.)
Topic revision: r2 - 28 Feb 2023, BenDugan
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