34921A D-Sub Connectors - Keysight Technologies 34922A User Manual

Low Frequency Multiplexer Modules

34921A D-Sub Connectors

Bank1
*TSIL = Temperature
Sensor Interface Line.
Provides thermocouple
reference sensor serial
output line to the
mainframe processor.
Desc
1H
1L
2H
2L
3H
3L
4H
4L
5H
5L
18
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34921A 40-Channel Armature Multiplexer with Low Thermal Offset
COM COM
1H 1L 2H 2L 3H 3L 1H 1L
1 2 3 4 5 6 7 8
TSIL* 11H 11L 7H 7L 17H 17L
18 19 20 21 22 23 24
GND 6H 6L 16H 16L 12H 12L 8H
41
34 35 36 37 38 39 40
Pin Desc Pin
1 6H 35
2 6L 36
3 7H 21
4 7L 22
5 8H 41
6 8L 42
9 9H 27
10 9L 28
13 10H 45
14 10L 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 34921T 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.
Keysight 34921A-34925A Low Frequency Multiplexer Modules User's Guide
For orientation, the D-sub
connector end of the module is
4H 4L 14H 14L 5H 5L 20H 20L
9 10 11 12 13 14 15
13H 13L 9H 9L 19H 19L 15H 15L Interlock 1
25 26 27 28 29 30 31 32
AMP AMP
8L 18H 18L 10H 10L 41L 41I
42 43 44 45 46 47 48
Desc Pin Desc
11H 19 16H
11L 20 16L
12H 39 17H
12L 40 17L
13H 25 18H
13L 26 18L
14H 11 19H
14L 12 19L
15H 31 20H
15L 32 20L
Bank 1
Bank 2
Interlock1
50-Pin D-Sub
16 17
Male Connector
33
AMP AMP
42L 42I
49 50
Pin Desc Pin
37 COM1 H 7
38 COM1 L 8
23 Interlock 1 17
24 Interlock 1 33
43 GND 34
44 TSIL* 18
29 AMP 41L 47
30 AMP 41I 48
15 AMP 42L 49
16 AMP 42I 50