Keysight 34921A-34925A User’s Guide 61
Bank 2
74
34
35
36 37
38
39 40
41
42
43 44 45
46
47 48 49
50
18
19 20
21 22
23
24
25 26
27 28
29 30 31 32
33
GND515271726364555675765960
NC NC NC NC
Reserved 61 62 53 54 73 65 66 57 58 77 78 69 70 Interlock 2
1 2 3 4 5 6 7 8 9 1011121314151617
Interlock 241 42 43 44 45 46
COM
2H
COM
2L
47 48 67 68 49 50 79 80
50-Pin D-Sub
Male Connector
Description Pin Description Pin Description Pin Description Pin Description Pin
411513561197137COM2 H 7
422523662207238COM2 L8
433532163397323Interlock 217
444542264407424Interlock 233
455554165257543Reserved 18
466564266267644GND34
479572767117729No Connect47
48 10 58 28 68 12 78 30 No Connect 48
49 13 59 45 69 31 79 15 No Connect 49
50 14 60 46 70 32 80 16 No Connect 50
As a safety feature, interlock 2 pins (17 and 33) on Bank 2 must be shorted to
enable the Bank 2 Analog Bus relays to close. The optional 34925T-002 (for
1-wire) terminal block shorts these pins for you. This feature protects
inadvertent routing of high voltages from the Analog Buses to the D-sub
connector of the module.
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