The Model 7505TDIN is a 50 contact terminal board with DIN hardware . It is compatible with models 626, 421, 425, and 7421.

Analog I/O Model 626	Digital I/O Models 421, 425, 626, 7421
Number	Function	Number	Function	Number	Function
1	Shield	2	Ground	1	I/O 24
3	-AD 0	4	+AD 0	3	I/O 23
5	-AD 1	6	+AD 1	5	I/O 22
7	-AD 2	8	+AD 2	7	I/O 21
8	-AD 3	10	+AD 3	9	I/O 20
11	-AD 4	12	+AD 4	11	I/O 19
13	-AD 5	14	+AD 5	13	I/O 18
15	-AD 6	16	+AD 6	15	I/O 17
17	-AD 7	18	+AD 7	17	I/O 16
19	Ground	20	Ground	19	I/O 15
21	-AD 8	22	+AD 8	21	I/O 14
23	-AD 9	24	+AD 9	23	I/O 13
25	-AD 10	26	+AD 10	25	I/O 12
27	-AD 11	28		27	I/O 11
29	-AD 12	30	+AD 12	29	I/O 10
31	-AD 13	32	+AD 13	31	I/O 9
33	-AD 14	34	+AD 14	33	I/O 8
35	-AD 15	36	+AD 15	35	I/O 7
37	Ground	38	Ground	37	I/O 6
39	Ground	40	Ground	39	I/O 5
41	DAC Sense 0	42	DAC 0	41	I/O 4
43	DAC Sense 1	44	DAC 1	43	I/O 3
45	DAC Sense 2	46	DAC 2	45	I/O 2
47	DAC Sense 3	48	DAC 3	47	I/O 1
				49	5V
49	Ground	50	Shield	Even terminals are at 5V return

Prices

Model 7505TDIN	50 contact terminal board with DIN hardware	Qty. 1 $79	Qty. 2-9  $72
Model 7501C	1/2 meter, 50 conductor flat cable	Qty. 1 $17	Qty. 2-9  $15
Model 7501C1	1.0 meter, 50 conductor flat cable	Qty. 1$ 30	Qty. 2-9 $27