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134 34980A User’s Guide
4 Low Frequency Multiplexer Switch Modules
34925A D-Sub Connectors for One-Wired Mode
Bank 1
Bank 2
For orientation, the D-sub connector
end of the module is facing you.
Bank 1
Bank 2
34
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
GND111231322324151635361920
NC NC NC NC
Reserved 21 22 13 14 33 25 26 17 18 37 38 29 30 Interlock 1
12 3 4 5 6 7 891011121314151617
Interlock11 23456
COM
1H
COM
1L
7 8 27289 103940
Description Pin Description Pin Description Pin Description Pin Description Pin
1 1 11 35 21 19 31 37 COM1 H 7
2 2 12 36 22 20 32 38 COM1 L 8
3 3 13 21 23 39 33 23 Interlock 1 17
4 4 14 22 24 40 34 24 Interlock 1 33
5 5 15 41 25 25 35 43 Reserved 18
6 6 16 42 26 26 36 44 GND 34
7 9 17 27 27 11 37 29 No Connect 47
8 1018 2828 1238 30No Connect48
9 1319 4529 3139 15No Connect49
10 14 20 46 30 32 40 16 No Connect 50
WARNING:: 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 34925T-002 (for
1-wire) terminal block
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.
WARNING
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
12 3 4 5 6 7 891011121314151617
Interlock 241 42 43 44 45 46
COM
2H
COM
2L
47 48 67 68 49 50 79 80
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
WARNING:: 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
WARNING