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Before designing cables, Opal-RT recommends using the guideline: Simulator EMC cable recommendations
HDB44 Connector Pinout
As explained in OP8940 Hardware Interface, both HDB44 connectors J1 and J2 share the same pin-out
8940 Pin | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 |
Signal Name | CH0 | CH2 | CH4 | GND | CH8 | CH10 | CH12 | GND | CH16 | CH18 | CH20 | GND | CH24 | CH26 | CH28 |
  | |||||||||||||||
Pin | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 |
Signal Name | CH1 | CH3 | CH5 | GND | CH9 | CH11 | CH13 | GND | CH17 | CH19 | CH21 | GND | CH25 | CH27 | CH29 |
| |||||||||||||||
Pin | 31 | 32 | 33 | 34 | 35 | 36 | 37 | 38 | 39 | 40 | 41 | 42 | 43 | 44 |
|
Signal Name | CH7 | CH6 | GND | GND | CH15 | CH14 | GND | GND | CH23 | CH22 | GND | GND | CH31 | CH30 |
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XJ2 Connector Pinout
  | XJ2 Signal | OP8940 | XJ2 Pin | XJ2 Signal | OP8940 | XJ2 Pin |
|---|---|---|---|---|---|---|
P0.0 | CH0 | a1 | P2.0 | CH16 | a7 | |
P0.1 | CH1 | b1 | P2.1 | CH17 | b7 | |
P0.2 | CH2 | d1 | P2.2 | CH18 | d7 | |
P0.3 | CH3 | e1 | P2.3 | CH19 | e7 | |
P0.4 | CH4 | a2 | P2.4 | CH20 | a8 | |
P0.5 | CH5 | b2 | P2.5 | CH21 | b8 | |
P0.6 | CH6 | d2 | P2.6 | CH22 | d8 | |
P0.7 | CH7 | e2 | P2.7 | CH23 | e8 | |
GND | GND | a3 | GND | GND | a9 | |
GND | GND | b3 | GND | GND | b9 | |
GND | GND | c3 | GND | GND | c9 | |
GND | GND | d3 | GND | GND | d9 | |
GND | GND | e3 | GND | GND | e9 | |
P1.0 | CH8 | a4 | P3.0 | CH24 | a10 | |
P1.1 | CH9 | b4 | P3.1 | CH25 | b10 | |
P1.2 | CH10 | d4 | P3.2 | CH26 | d10 | |
P1.3 | CH11 | e4 | P3.3 | CH27 | e10 | |
P1.4 | CH12 | a5 | P3.4 | CH28 | a11 | |
P1.5 | CH13 | b5 | P3.5 | CH29 | b11 | |
P1.6 | CH14 | d5 | P3.6 | CH30 | d11 | |
P1.7 | CH15 | e5 | P3.7 | CH31 | e11 | |
GND | GND | a6 | GND | GND | a20 | |
GND | GND | b6 | GND | GND | b20 | |
GND | GND | c6 | GND | GND | c20 | |
GND | GND | d6 | GND | GND | d20 | |
GND | GND | e6 | GND | GND | e20 | |
GND | GND | a17 | GND | GND | a23 | |
GND | GND | b17 | GND | GND | b23 | |
GND | GND | c17 | GND | GND | c23 | |
GND | GND | d17 | GND | GND | d23 | |
GND | GND | e17 | GND | GND | e23 |
XJ3 connector pinout
XJ3 connector   | Molex connector (on standard RTI)   | XJ3 pin | OP8910 |
|---|---|---|---|
H | VBus_A | ||
G | GND | ||
F | VBus_B | ||
E | GND | ||
D | VUser_1 | ||
C | GND | ||
B | VUser_2 | ||
A | GND |
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