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Low Frequency Multiplexer Modules
34923A D-Sub Connectors for One-Wire Mode
Bank 1
Reserved
GND
Desc
1
2
3
4
5
6
7
8
9
10
36
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COM
COM
1
2
3
4
5
6
1H
1L
1
2
3
4
5
6
7
8
21
22
13
14
33
34
18
21
22
24
19
20
23
11
12
31
32
23
24
15
34
35
38
39
40
41
36
37
Pin
Desc
Pin
1
11
35
2
12
36
3
13
21
4
14
22
5
15
41
6
16
42
9
17
27
10
18
28
13
19
45
14
20
46
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.
Keysight 34921A-34925A Low Frequency Multiplexer Modules User's Guide
34923A 40/80-Channel Reed Multiplexer
For orientation, the D-sub connector
end of the module is facing you.
7
8
27
28
9
10
39
9
10
11
12
13
14
15
25
26
17
18
37
38
29
30 Interlock 1
27
28
25
26
29
30
31
32
Reserved
16
35
36
19
20
42
43
44
45
46
47
48
Desc
Pin
Desc
21
19
31
22
20
31
23
39
33
24
40
34
25
25
35
26
26
36
27
11
37
28
12
38
29
31
39
30
32
40
Bank 1
Bank 2
40
Interlock1
50-Pin D-Sub
16
17
Male Connector
33
49
50
Pin
Desc
Pin
37
COM1 H
7
38
COM1 L
8
23
Interlock
17
1
24
Interlock
33
1
43
GND
34
44
Reserved
18
29
Reserved
47
30
Reserved
48
15
Reserved
49
16
Reserved
50
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