Keithley 7709, User Manual, Page: 13 / 33

10
D-shell connectors
Figure 8 shows the pin numbers for the Model 7709 rear panel connectors. The 50-pin D-shell is used for DUT and external
source connections. The 25-pin D-shell is used to daisy-chain the matrix rows of two or more Model 7709s. Terminal
identification for the female connector pins are contained in
Table 1 .
Figure 8
Rear view – Model 7709 D-shell pinouts
Table 1
D-shell pin identification
50-pin D-shell
(DB-50)
25-pin D-shell
(DB-25)
Pin
Matrix
terminal Pin
Matrix
terminal Pin
Matrix
terminal
1 Row 1 Hi 25 Col 2 Lo 1 Row 1 Hi
2 Row 2 Lo 26 Col 3 Hi 2 Row 2 Hi
3 — 27 Col 4 Lo 3 Row 3 Hi
4 Row 4 Lo 28 Col 5 Hi 4 —
5 — 29 Col 6 Lo 5 Row 4 Hi
6 Row 6 Lo 30 Col 7 Hi 6 Row 5 Hi
7 — 31 Col 8 Lo 7 —
8 Col 1 Lo 32, 33 — 8 Row 6 Hi
9 — 34 Row 1 Lo 9-13 —
10 Col 3 Lo 35 Row 3 Hi 14 Row 1 Lo
11 — 36 — 15 Row 2 Lo
12 Col 5 Lo 37 Row 5 Hi 16 Row 3 Lo
13 — 38-40 — 17 —
14 Col 7 Lo 41 Col 2 Hi 18 Row 4 Lo
15-17 — 42 — 19 Row 5 Lo
18 Row 2 Hi 43 Col 4 Hi 20 —
19 Row 3 Lo 44 — 21 Row 6 Lo
20 Row 4 Hi 45 Col 6 Hi 22-25 —
21 Row 5 Lo 46 —
22 Row 6 Hi 47 Col 8 Hi
23 — 48-50 —
24 Col 1 Hi
1
17
18
34 50
33
13 1
14 25
50-Pin D-Shell Connector (Female)
25-Pin D-Shell Connector (Female)