Keysight Technologies 34921A User Manual page 27

As a safety feature, interlock 1 pins (39 and 59) on Bank 1 must be shorted to
WARNING
enable the Bank 1 Analog Bus relays to close. The optional 34922T terminal
blocks short these pins for you. This feature protects inad vertent routing of
high voltages from the Analog Buses to the D-sub connector of the module.
Bank 2
41H 41L 36H 36L
1 2 3 4
51H 51L 46H
21 22 23
GND 61H 61L 56H
40
41 42 43
GND 67H 67L
60 61 62
Description Pin Description
36H 3 43H
36L 4 43L
37H 7 44H
37L 8 44L
38H 11 45H
38L 12 45L
39H 15 46H
39L 16 46L
40H 19 47H
40L 20 47L
Keysight 34921A-34925A User's Guide
COM COM
42H 42L 37H 37L 2H 2L
5 6 7 8 9 10
46L 52H 52L 47H 47L 43H
24 25 26 27 28 29
56L 57H 57L 62H 62L 48H
44 47 49
45 46 48
66H 66L 68H 68L 53H 53L
63 64 65 66 67 68
Pin Description
29 50H
30 50L
13 51H
14 51L
17 52H
18 52L
23 53H
24 53L
27 54H
28 54L
38H 38L 44H 44L 39H 39L
11 12 13 14 15 16
43L 69H 69L 54H 54L 49H
30 31 32 33 34 35
48L 63H 63L 59H 59L 64H
50 51 53 54 55
52
58H 58L 70H 70L 65H 65L
69 70 71 72 73 74
Pin Description
57 57H 45
58 57L 46
21 58H 69
22 58L 70
25 59H 53
26 59L 54
67 60H 75
68 60L 76
33 61H 41
34 61L 42
Bank 1
For orientation, the D-sub connector
end of the module is facing you.
45H 45L 40H 40L
20
17 18 19
49L 55H 55L Interlock 2
37 38 39
36
64L 50H 50L Interlock 2
56 57 58 59
60H 60L
NC NC
77 78
75 76
Pin Description Pin
64H 55
64L 56
65H 73
65L 74
66H 63
66L 64
67H 61
67L 62
68H 65
68L 66
Bank 2
78-Pin D-Sub
Male Connector
Description Pin
COM2 H 9
COM2 L 10
Interlock 2 39
Interlock 2 59
GND 40
GND 60
No Connect 77
No Connect 78
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