40 Keysight 34921A-34925A User’s Guide
Bank 2
As a safety feature, interlock 1 pins (17 and 33) on Bank 1 must be shorted to
enable the Bank 1 Analog Bus relays to close. The optional 34923T-002 (for
1-wire) shorts these pins for you. This feature protects inadvertent routing of
high voltages from the Analog Bus to the D-sub connector of the module.
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
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
Reserved
50-Pin D-Sub
Male Connector
Description Pin Description Pin Description Pin Description Pin Description Pin
411513561197137COM2 H7
422523662207238COM2 L 8
433532163397323Interlock 217
444542264407424Interlock 233
455554165257543GND34
466564266267644Reserved 18
479572767117729Reserved47
48 10 58 28 68 12 78 30 Reserved 48
49 13 59 45 69 31 79 15 Reserved 49
50 14 60 46 70 32 80 16 Reserved 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 34923T-002 (for
1-wire) 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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