Card connector types and pinouts

This series uses card edge connectors all over the place.

Cable end connectors

Most extension cards that have a cable will have a 2x24 pin card edge to connect the cables to. Cable connectors on these connectors must be placed with the cable exit to the RIGHT:

The edge connector needed for this has the following specs:

Contacts: 48 total, arranged as two rows of 24
Pitch: 0.156 inch (3.96 mm)
Type: dual-readout card-edge / edge-card connector, one position keyed as a polarizing slot
Mating part: an EDAC 305-series (or Sullins equivalent) 48-position 0.156" edge connector

and can be found here: https://eu.mouser.com/en/ProductDetail/587-305-048-500-202. The product spec is here.

The pinout for the connector, as seen from the card, is as follows:

The component side of the board houses pin numbers 1..24
The back side of the board houses A..BB

Looking at an example board like this:

cableconnector layout

the pinout is, from top to bottom of that image:

Component pin	Bottom pin
1	A
2	B
3	C
4	D
5	E
6	F
7	H
8	J
9	K
10	L
11	M
12	N
13	P
14	R
15	S
16	T
17	U
18	V
19	W
20	X
21	Y
22	Z
23	AA
24	BB

Component pin	Bottom pin
1	A
2	B
3	C
4	D
5	E
6	F
7	H
8	J
9	K
10	L
11	M
12	N
13	P
14	R
15	S
16	T
17	U
18	V
19	W
20	X
21	Y
22	Z
23	AA
24	BB

Component pin	Bottom pin
1	A
2	B
3	C
4	D
5	E
6	F
7	H
8	J
9	K
10	L
11	M
12	N
13	P
14	R
15	S
16	T
17	U
18	V
19	W
20	X
21	Y
22	Z
23	AA
24	BB

Component pin	Bottom pin
1	A
2	B
3	C
4	D
5	E
6	F
7	H
8	J
9	K
10	L
11	M
12	N
13	P
14	R
15	S
16	T
17	U
18	V
19	W
20	X
21	Y
22	Z
23	AA
24	BB