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P2 Pinout

Pin FunctionSorted ascending
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.)
Topic revision: r2 - 28 Feb 2023, BenDugan
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