Keysight 34931A-34933A
Matrix Modules
User’s Guide
Notices
CAUTION
WARNING
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© Keysight Technologies 2008-2019
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Manual Part Number
34980-90031
Edition
Edition 3, July 1, 2019
Printed in:
Printed in Malaysia
Published by:
Keysight Technologies
Bayan Lepas Free Industrial Zone,
11900 Penang, Malaysia
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Safety Information
A CAUTION notice denotes a hazard. It
calls attention to an operating
procedure, practice, or the like that, if
not correctly performed or adhered to,
could result in damage to the product
or loss of important data. Do not
proceed beyond a CAUTION notice
until the indicated conditions are fully
understood and met.
A WARNING notice denotes a hazard. It
calls attention to an operating
procedure, practice, or the like that, if
not correctly performed or adhered to,
could result in personal injury or death.
Do not proceed beyond a WARNING
notice until the indicated conditions are
fully understood and met.
2 Keysight 34931A-34933A User’s Guide
Safety Symbols
The following symbols on the instrument and in the documentation indicate
precautions which must be taken to maintain safe operation of the instrument.
Alternating current (AC) Caution, risk of electric shock
Frame or chassis (ground) terminal
Standby supply. Unit is not completely
disconnected from ac mains when
switch is off
Caution, risk of danger (refer to this
manual for specific Warning or Caution
information)
Keysight 34931A-34933A User’s Guide 3
Additional Safety Notices
The following general safety precautions must be observed during all phases of
operation of this instrument. Failure to comply with these precautions or with
specific warnings or instructions elsewhere in this manual violates safety
standards of design, manufacture, and intended use of the instrument. Keysight
Technologies assumes no liability of the customer’s failure to comply with the
requirements.
General
Do not use this products in any manner not specified by the manufacturer. The
protective features of this product may be impaired if it is used in a manner not
specified in the operation instructions.
Before Applying Power
Verify that all safety precautions are taken. Make all connections to the unit before
applying power.
Ground the Instrument
This product is provided with protective earth terminals. To minimize shock
hazard, the instrument must be connected to the ac power mains through a
grounded power cable, with the ground wire firmly connected to an electrical
ground (safety ground) at the power outlet. Any interruption of the protective
(grounding) conductor or disconnection of the protective earth terminal will cause
a potential shock hazard that could result in personal injury.
Do Not Operate in an Explosive Atmosphere
Do not operate the instrument in the presence of flammable gases or fumes.
4 Keysight 34931A-34933A User’s Guide
Do Not Remove the Instrument Cover
Only qualified, service-trained personal who are aware of the hazards involved
should remove instrument covers. Always disconnect the power cable and any
external circuits before removing the instrument cover.
Do Not Modify the Instrument
Do not install substitute parts or perform any unauthorized modification to the
product. Return the product to an Keysight Sales and Service Office for service
and repair to ensure that safety features are maintained.
In Case of Damage
Instruments that appear damaged or defective should be made inoperative and
secured against unintended operation until they can be repaired by qualified
service personnel.
Keysight 34931A-34933A User’s Guide 5
Waste Electrical and Electronic Equipment (WEEE) Directive 2002/ 96/EC
This instrument complies with the WEEE Directive (2002/96/EC) marking
requirement. This affixed product label indicates that you must not discard this
electrical or electronic product in domestic household waste.
Product category:
With reference to the equipment types in the WEEE directive Annex 1, this
instrument is classified as a “Monitoring and Control Instrument” product.
The affixed product label is as shown below.
Do not dispose in domestic household waste.
To return this unwanted instrument, contact your nearest Keysight Service Center,
or visit http://about.keysight.com/en/companyinfo/environment/takeback.shtml
for more information.
Sales and Technical Support
To contact Keysight for sales and technical support, refer to the support links on
the following Keysight websites:
– www.keysight.com/find/34980a
(product-specific information and support, software and
documentation updates)
– www.keysight.com/find/assist
(worldwide contact information for repair and service)
6 Keysight 34931A-34933A User’s Guide
Table of Contents
Safety Symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
Additional Safety Notices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
Before Applying Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
Ground the Instrument . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
Do Not Operate in an Explosive Atmosphere . . . . . . . . . . . . . . . . . . .4
Do Not Remove the Instrument Cover . . . . . . . . . . . . . . . . . . . . . . . .5
Do Not Modify the Instrument . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
In Case of Damage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
Waste Electrical and Electronic Equipment (WEEE) Directive 2002/96/
EC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Product category: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Sales and Technical Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Matrix Modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
Operating Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
SCPI Programming Examples for the Matrix Modules . . . . . . . . . . . . . .11
Linking Multiple Matrix Modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
34931A Dual 4x8 Armature Matrix . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
34931A Simplified Schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
34931A D-Sub Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19
34931T Terminal Block . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21
34932A Dual 4x16 Armature Matrix . . . . . . . . . . . . . . . . . . . . . . . . . . .23
34932A Simplified Schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24
34932A D-Sub Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25
34932T Terminal Block . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27
34933A Dual/Quad 4x8 Reed Matrix . . . . . . . . . . . . . . . . . . . . . . . . . . .28
34933A Simplified Schematic for Two-Wire Mode . . . . . . . . . . . . .30
34933A D-Sub Connectors for Two-Wire Mode . . . . . . . . . . . . . . . .31
34933T-001 Terminal Block for Two-Wire Mode . . . . . . . . . . . . . . .33
34933A Simplified Schematic for One-Wire Mode . . . . . . . . . . . . .35
Keysight 34931A-34933A User’s Guide 7
34933A D-Sub Connectors for One-Wire Mode . . . . . . . . . . . . . . . 36
34933T-002 Terminal Block for One-Wire Mode . . . . . . . . . . . . . . . 38
8 Keysight 34931A-34933A User’s Guide
Matrix Modules
This User’s Guide covers the following three plug-in modules for the Keysight
34980A Multifunction Switch/Measure Unit:
34931A Dual 4x8 armature matrix
34932A Dual 4x16 armature matrix
34933A Dual/Quad 4x8 reed matrix
The 34931A has two (dual) matrices of latching armature switches.
Each matrix is organized in a 4-row by 8-column configuration.
The 34932A has two (dual) matrices of latching armature switches.
Each matrix is organized in a 4-row by 16-column configuration.
The 34933A has non-latching reed switches, which you can configure for:
– differential (2-wire) mode, which has two (dual) matrices.
Each matrix is organized in a 4-row by 8-column configuration.
– single-ended (1-wire) mode, which has four (quad) matrices.
Each matrix is organized in a 4-row by 8-column configuration.
These matrix switch modules offer a convenient way for you to connect multiple
instruments to multiple points on your device under test. For a lower cost and
better specification alternative, you can connect both matrix and multiplexer
(MUX) modules.
Keysight 34931A-34933A User’s Guide 9
Operating Considerations
NOTE
Connection to Voltage Sources
Although flexible, it is possible to connect more than one source at the same time
with a matrix. Make sure that dangerous or unwanted conditions are not created
by these connections.
Safety Interlock
300V signals. The matrix modules have a hardware Safety Interlock feature that
automatically opens the Analog Bus relays when the associated interlock pins on
the D-sub connectors (faceplate) lose continuity. This prevents signals on the
Analog Buses from being present on the D-sub connector pins. Optional terminal
blocks available from Keysight automatically provide continuity for these
interlock pins. If cables are used, you must provide continuity for the interlock
pins in your DUT assembly. See the pinout information later in this manual for
the location of interlock pins on each module.
The matrix modules have Analog Bus relays on Bank 2 only. Therefore, the
interlock pins are present on only the Bank 2 D-sub connectors.
Normally, if you attempt to connect to the Analog Buses without
a terminal block or cable connected, an error is generated. The
SYSTem:ABUS:INTerlock:SIMulate command allows you to temporarily
disable errors generated by the Safety Interlock feature and enables the
simulation mode. Although Safety Interlock errors are suppressed in this mode,
the actual Analog Bus relays affected by the Safety Interlock are disabled as
long as no terminal block or cable is connected to the module.
The Analog Buses of the 34980A are capable of carrying
Electrical Considerations
See the Introduction to the Plug In Modules chapter of the 34980A Mainframe
User’s Guide for detailed environmental operating conditions for the 34980A
mainframe and its installed modules. That guidance sets maximum per channel
current and power ratings at rated voltage for pollution degree 1 (dry) and
pollution degree 2 (possible condensation) conditions, for each of the matrix
modules.
10 Keysight 34931A-34933A User’s Guide
SCPI Programming Examples for the Matrix Modules
The programming examples below provide you with SCPI command examples to
use for actions specific to the matrix switch modules.
The slot and channel addressing scheme used in these examples follow the
general form sccc where s is the mainframe slot number (1 through 8) and ccc is
the three-digit channel number. Channel numbers for the matrix modules are
derived as follows:
Two-wire mode:
34933A (2-wire mode) are derived from the crosspoint or intersection of rows and
columns, columns having two digits. See the example below.
Displayed Channel Means This...
5304 A 34931A, 34932A, 34933A (2-wire mode)
One-wire mode:
derived from a specific matrix number and the crosspoint or intersection of rows
and columns on that matrix. See the example below.
Displayed Channel Means This...
2437 A 34933A matrix module in 1-wire mode is
The channel numbers for the 34931A, 34932A, and the
matrix module is in slot 5, crosspoint is row
3, column 4. It might be easy to remember
this channel configuration as “srcc” (slot,
row, column, column)
The channel numbers for the 34933A (in 1-wire mode) are
in slot 2, matrix of interest is 4, crosspoint is
row 3, column 7. It might be easy to
remember this channel configuration as
“smrc” (slot, matrix, row, column)
For information on specific configurations, refer to the simplified schematics for
the matrix modules on page 18, page 24, page 30 and page 35.
Keysight 34931A-34933A User’s Guide 11
For complete information on the SCPI commands used to program the 34980A,
NOTE
NOTE
refer to the Keysight 34980A Programmer’s Reference which can be downloaded
from www.keysight.com/find/34980A.
Opening and Closing Channels
Example: Closing and opening matrix channels (34931A, 34932A, and
34933A in two-wire mode)
311 and 312 through 315 of a 34932A matrix module in 2-wire mode. This module
is in slot 3. The channel number represents the matrix crosspoint of a row (one
digit) and a column (two digits). For example, channel 311 represents crosspoint
at row 3 and column 11 on a 34932A module.
ROUTe:CLOSe (@3311,3312:3315)
ROUTe:OPEN (@3311,3312:3315)
The following commands close and open channels
Example: Closing and opening matrix channels (34933A in one-wire
mode)
315 of the 34933A module in 1-wire mode. The module is in slot 4. The channel
number represents the matrix and the matrix crosspoint of a row (one digit) and a
column (one digit). For example, channel 311 represents the crosspoint on matrix
3 at row 1, column 1 on a 34933A module in 1-wire mode.
ROUTe:CLOSe (@3311,3312:3315)
ROUTe:OPEN (@3311,3312:3315)
The following commands close and open channels 311 and 312 through
Although the previous two examples show the same channel numbers, the
channels are derived differently as determined by a module’s configuration
mode. See page 11 for channel number derivation.
Example: Closing and opening Analog Bus relays
connects the Analog Buses to Matrix 2 for a module (in 2-wire mode) in slot 3.
ROUTe:CLOSe (@3921,3922,3923,3924)
ROUTe:OPEN (@3921,3922,3923,3924)
For matrix modules in 2-wire mode, only Matrix 2 connects to the the Analog
Buses. For the 34933A in 1-wire mode, only Matrix 3 and Matrix 4 connect to the
Analog Buses.
12 Keysight 34931A-34933A User’s Guide
The following command
The Analog Bus relays (numbered s921, s922, s923, etc.) on the matrix modules
NOTE
are ignored if they are included in a range of channels. An error will be generated
if an Analog Bus relay is specified as the first or last channel in a range of
channels. For example, the following command closes all valid channels between
channel 304 and channel 615 (slot 2). In addition, this command closes Analog
Bus relay 911 on the module in slot 1 (Bank 1). Note that although the specified
range of channels includes the other Analog Bus relays, they are ignored and are
not closed by this command.
ROUTe:CLOSe (@2304:2615,1911)
Example: Querying channels for open or close state
command returns a 1 (true) or 0 (false) state of channel 204 for a module in slot 3.
ROUTe:CLOSe (@3204)
ROUTe:CLOSe? (@3204) !Returns a 1
ROUTe:OPEN? (@3204) !Returns a 0
The following
Configuring a Module
Example: Configuring the 34933A module for 2-wire or 1-wire mode
following command configures a matrix module in slot 4 for 1-wire measurements.
Because you can configure only the 34933A (and the 34923A and 34925A MUX
modules) for either 2-wire or 1-wire mode, an error is generated if you send this
command to a slot that does not contain one of those three modules. If you are
using terminal blocks with the 34933A module, be sure to use the corresponding
2-wire or 1-wire terminal block.
SYSTem:MODule:WIRE:MODE WIRE1,4
When using a command to configure the system, the new configuration does not
take effect until you cycle power on the 34980A.
Example: Querying the system for module Identify
returns the identity of the module installed in slot 7.
SYSTem:CTYPe? 7
The following command
The
Keysight 34931A-34933A User’s Guide 13
NOTE
For the 34933A matrix module, the query response may include a suffix to
indicate a 1-wire configuration. For example, the response for the 34933A will be
either "34933A" (differential mode) or "34933A-1W" (single-ended mode).
Reading Cycle Count and Resetting Modules to Power-On State
Example: Reading the cycle count for a relay
returns the cycle count on channels 304 and 308 for a matrix module in slot 3.
DIAGnostic:RELay:CYCLes? (@3304,3308)
Example: Resetting module(s) to power-on state
resets a module in slot 4 to its power-on state.
SYSTem:CPON 4
The following command
The following command
14 Keysight 34931A-34933A User’s Guide
Linking Multiple Matrix Modules
You can link multiple matrix modules to form a larger matrix. The drawings on
page 16 show examples of two-module connections through rows and columns.
Wiring Multiple 34931A or 34932A Modules
With a 34931A you can combine two matrices to form 8x8 (connecting columns)
or 4x16 (connecting rows) configurations. Using two 34932A matrices on a
34932A module, you can create 16x8 (connecting columns) or 4x32 (connecting
rows) configurations.
You can connect rows in separate modules using external wiring. Or, using Bank 2
matrices, you can connect through the mainframe Analog Buses. For a clear idea
of how matrices are arranged and their connections to the Analog Buses, see the
simplified schematics on page 18 (34931A) and page 24 (34932A).
You must use external wiring whenever you connect:
– Rows in Matrix 1 of separate modules
– Rows in Matrix 1 to rows in Matrix 2 on the same or separate modules
– Columns of two matrices on the same or separate modules
You can expand upon these two-module configurations and add up to eight
modules to design your own large matrices. From a programming standpoint,
each matrix module operates as an independent module regardless of the
external connections. When linking modules, the channel numbering scheme
remains the same as for single modules.
Wiring Multiple 34933A Modules
You can connect matrices on the 34933A module in a similar fashion to the
34931A. However, the presence of in-rush resistors on the Analog Buses and
columns require additional consideration, and you must take care when linking
multiple 34933A matrix modules. See the simplified schematics on page 30 and
page 35.
Keysight 34931A-34933A User’s Guide 15
1
2
3
4
1
2
3
4
123 n*n - 1
123 n*n - 1
*n can be 8 or 16
8 or 16 Columns
8 Rows
Module 1
Module 2
Increase number of
rows by connecting
through columns
1
2
3
4
1
2
3
4
123 n*n - 1123 n*n - 1
Analog
Buses
4 Rows
*n can be 8 or 16
Module 1 Module 2
16 or 32 Columns
Increase number of
columns by connecting
through rows
16 Keysight 34931A-34933A User’s Guide
34931A Dual 4x8 Armature Matrix
NOTE
The 34931A dual 4x8 armature matrix contains two matrices, each with 32 2-wire
crosspoint latching armature relays organized in a 4-row by 8-column
configuration. Every row and column are made up of two wires each, a high (H)
and a low (L). Each crosspoint relay has a unique channel number representing
the row and column that intersects to create the crosspoint. For example, channel
304 represent the crosspoint connection between row 3 and column 4 (all
columns consisting of two digits; in this case the digits are 04). See the simplified
schematic on page 18.
You can connect any combination of inputs and outputs at the same time.
However, only Matrix 2 in this module connects to the Analog Buses. By closing
channels 921 and 922 you can connect rows 5 and 6 respectively to the internal
DMM of the 34980A mainframe for voltage and resistance measurements. You
can connect multiple matrix modules externally and/or through the Analog Buses
for applications that require large matrices. For information on linking multiple
matrices, refer to page 15 of this manual.
When the DMM is scanning, it controls ABus1 and ABus2 relays, which are on
Matrix 2. Therefore, consider this behavior when you are connecting matrices.
When the power is off, matrix relays maintain state, and Analog Bus relays open.
Keysight 34931A-34933A User’s Guide 17
34931A Simplified Schematic
ABus1
DMM
(MEAS)
ABus2
DMM
(SENS)
ABus3
ABus4
922
923
924
921
HLHLHLHLHLHLHLHL
L
L
L
L
H
H
H
H
H
H
H
L
L
L
L
HHL
L
H HHHHHHHLLLLLLLL
L
L
L
L
H
H
H
Matrix 1
Matrix 2
Analog Buses
Row 1
Row 2
Row 3
Row 4
Row 5
Row 6
Row 7
Row 8
Col 1 Col 2 Col 3 Col 4 Col 5 Col 6 Col 7 Col 8
Col 1 Col 2 Col 3 Col 4 Col 5 Col 6 Col 7 Col 8
NOTE: Matrix 1 and Matrix 2 are
electrically separate from one another.
NOTE:
Matrix Relays: Armature latching
Analog Bus Relays: Armature non-latching
NOTE: Three-digit channel numbers
are derived from the intersection of
the rows and columns, columns
having two digits. The intersection
shown here represents Channel 304
(Row 3, Column 4)
18 Keysight 34931A-34933A User’s Guide
34931A D-Sub Connectors
For orientation, the D-sub connector
end of the module is facing you.
Matrix 1 Matrix 2
1 2 3 4 5 6 7 8 9 1011121314151617
NC
C4H C4L
NC NC
R4H R4L
C5H C5L
NC NC NC NC
C7H C7L
NC NC
18
19 20
21 22
23
24
25 26
27 28
29 30 31 32
33
C2L
NC NC NC NC NC
C2H
NC NC
R2H R2L C8H C8L
NC NC
GND
NCNC
C3H C3L C1H C1L R3H R3L C6H C6L
NC NC NC
NC NC
R1H R1L
34
35
36 37
38
39 40
41
42
43 44 45
46
47 48 49
50
NOTE: In this diagram and
the table below, R represents
“row,” and C represents
“column.”
50-Pin D-Sub Male
Connector
Matrix 1
Description Pin Description Pin Description Pin
R1H 49 C2H 23 C7H 13
R1L 50 C2L 24 C7L 14
R2H 27 C3H 35 C8H 29
R2L 28 C3L 36 C8L 30
R3H 39 C4H 1 GND 33
R3L 40 C4L 2 No Connect pins:
R4H 5 C5H 7
R4L 6 C5L 8
C1H 37 C6H 41
C1L 38 C6L 42
Keysight 34931A-34933A User’s Guide 19
3-4, 9-12, 15-22, 25-26, 31-32, 34,
and 43-48.
Matrix 2
34
35
36 37
38
39 40
41
42
43 44 45
46
47 48 49
50
NCNC
C3H C3L C1H C1L R7H R7L C6H C6L
NC NC NC
NC NC
R5H R5L
1 2 3 4 5 6 7 8 9 1011121314151617
Interlock
C4H C4L
NC NC
R8H R8L
C5H C5L
NC NC NC NC
C7H C7L
NC NC
18
19 20
21 22
23
24
25 26
27 28
29 30 31 32
33
C2L
NC NC NC NC NC
C2H
NC NC
R6H R6L C8H C8L
NC NC
Interlock
NOTE: In this diagram and
the table below, R
represents “row,” and C
represents “column.”
50-Pin D-Sub
Male Connector
WARNING
Description Pin Description Pin Description Pin
R5H 49 C2H 23 C7H 13
R5L 50 C2L 24 C7L 14
R6H 27 C3H 35 C8H 29
R6L 28 C3L 36 C8L 30
R7H 39 C4H 1 Interlock 17
R7L 40 C4L 2 Interlock 33
R8H 5 C5H 7 No Connect pins: 3-4, 9-12, 15-16.
R8L 6 C5L 8
C1H 37 C6H 41
C1L 38 C6L 42
18-22, 25-26, 31-32, 34, 43-48
As a safety feature, interlock pins (17 and 33) must be shorted to enable the
Analog Bus relays, which are on Matrix 2, to close. The optional 34931T
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.
20 Keysight 34931A-34933A User’s Guide
34931T Terminal Block
NOTE
This terminal block with screw-type connections is labeled with the model number
and the abbreviated module name. In addition, space is available on the label for
you to write the slot number.
All modules that connect to the internal DMM are interlock protected. This
means that when an installed module is exposed (no terminal block or cable is
connected), the Analog Bus relays, which are on Matrix 2, are open and
disconnected from the Analog Buses. See page 10 for further information.
Keysight 34931A-34933A User’s Guide 21
NOTE
On the 34931T terminal block, only two sets of screw terminals are for use with
When using the 34931T terminal block, be sure to
wire your connections to the two sets of screw
terminals closest to the 50-pin D-sub connectors.
Although columns are numbered the same on
Matrix 1 and Matrix 2, they are electrically
separate from one another (e.g., Col C8).
W
i
r
e
S
i
z
e
:
2
0
A
W
G
T
y
p
i
c
a
l
1
8
A
W
G
M
a
x
the 34931A module. See the following drawing.
22 Keysight 34931A-34933A User’s Guide
34932A Dual 4x16 Armature Matrix
NOTE
The 34932A dual 4x16 armature matrix contains two matrices, each with 64
2-wire crosspoint latching armature relays organized in a 4-row by 16-column
configuration. Every row and column are made up of two wires each, a high (H)
and a low (L). Each crosspoint relay has a unique channel number representing
the row and column that intersect to create the crosspoint. For example, channel
315 represents the crosspoint connection between row 3 and column 15 (all
columns consisting of two digits; in this case the digits are 15). See the simplified
schematic on page 24.
You can connect any combination of inputs and outputs at the same time.
However, only Matrix 2 in this module connects to the Analog Buses. By closing
channels 921 and 922 you can connect rows 5 and 6 respectively to the internal
DMM of the 34980A mainframe for voltage and resistance measurements. You
can connect multiple matrix modules externally and/or through the Analog Buses
for applications that require large matrices. For information on linking multiple
matrix modules, refer to page 15 of this manual.
When the DMM is scanning, it controls ABus1 and ABus2 relays, which are on
Matrix 2. Therefore, consider this behavior when you are connecting matrices.
When the power is off, matrix relays maintain state, and Analog Bus relays open.
Keysight 34931A-34933A User’s Guide 23
34932A Simplified Schematic
ABus1
DMM
(MEAS)
ABus2
DMM
(SENS)
ABus3
ABus4
922
923
924
921
HLHLHLHL HLHL
L
L
L
L
H
H
H
H
H
H
H
L
L
L
L
HHHH HHLLLLLL
L
L
L
L
H
H
H
Col 1 Col 2 Col 3 Col 4 Col 15 Col 16
Col 1 Col 2 Col 3 Col 4 Col 15 Col 16
Row 1
Row 2
Row 3
Row 4
Row 5
Row 6
Row 7
Row 8
Matrix 1
Matrix 2
Analog Buses
HHL
L
NOTE: Matrix 1 and Matrix 2 are
electrically separate from one another.
NOTE: Three-digit channel numbers are
derived from the intersection of the rows
and columns, columns having two digits.
The intersection shown here represents
Channel 315 (Row 3, Column 15).
NOTE:
Matrix Relays: Armature latching
Analog Bus Relays: Armature non-latching
24 Keysight 34931A-34933A User’s Guide
34932A D-Sub Connectors
For orientation, the D-sub connector
end of the module is facing you.
Matrix 1
Matrix 2
NOTE: In this diagram
and the table below, R
represents “row,” and C
represents “column.”
50-Pin D-Sub
Male Connector
C12H
1 2 3 4 5 6 7 8 9 1011121314151617
NC
C4H C4L C12L R4H R4L
C5H C5L
C13H C13L
NC NC
C7H C7L C15H C15L
18
19 20
21 22
23
24
25 26
27 28
29 30 31 32
33
C2L
NC
C11H C11L C9H C9L C2H
C14H
C14L
R2H R2L C8H C8L
NC NC
GND
34
35
36 37
38
39 40
41
42
43 44 45
46
47 48 49
50
NCNC
C3H C3L C1H C1L R3H R3L C6H C6L C10H C10L
NC
C16H C16L R1H R1L
Matrix 1
Description Pin Description Pin Description Pin Description Pin Description Pin
R1H 49 C2H 23 C7H 13 C12H 3 GND 33
R1L 50 C2L 24 C7L 14 C12L 4 No Connect pins:
R2H 27 C3H 35 C8H 29 C13H 9
R2L 28 C3L 36 C8L 30 C13L 10
R3H 39 C4H 1 C9H 21 C14H 25
11-12, 17-18, 31-32,
34, and 45-46
R3L 40 C4L 2 C9L 22 C14L 26
R4H 5 C5H 7 C10H 43 C15H 15
R4L 6 C5L 8 C10L 44 C15L 16
C1H 37 C6H 41 C11H 19 C16H 47
C1L 38 C6L 42 C11L 20 C16L 48
Keysight 34931A-34933A User’s Guide 25
Matrix 2
NOTE: In this diagram
and the table below, R
represents “row,” and C
represents “column.”
50-Pin D-Sub
Male Connector
1 2 3 4 5 6 7 8 9 1011121314151617
InterlockC4H C4L C12H C12L R8H R8L
C5H C5L
C13H C13L
NC NC
C7H C7L C15H C15L
34
35
36 37
38
39 40
41
42
43 44 45
46
47 48 49
50
NC
NC C3H C3L C1H C1L R7H R7L C6H C6L C10H C10L
NC
C16H C16L R5H R5L
18
19 20
21 22
23
24
25 26
27 28
29 30 31 32
33
C2L
NC
C11H C11L C9H C9L C2H
C14H
C14L
R6H
R6L C8H C8L
NC NC
Interlock
WARNING
Description Pin Description Pin Description Pin Description Pin Description Pin
R5H 49 C2H 23 C7H 13 C12H 3 Interlock 17
R5L 50 C2L 24 C7L 14 C12L 4 Interlock 33
R6H 27 C3H 35 C8H 29 C13H 9 No connect pins:
R6L 28 C3L 36 C8L 30 C13L 10
R7H 39 C4H 1 C9H 21 C14H 25
R7L 40 C4L 2 C9L 22 C14L 26
R8H 5 C5H 7 C10H 43 C15H 15
R8L 6 C5L 8 C10L 44 C15L 16
C1H 37 C6H 41 C11H 19 C16H 47
C1L 38 C6L 42 C11L 20 C16L 48
11-12, 18, 31-32, 34,
and 45-46.
As a safety feature, interlock pins (17 and 33) must be shorted to enable the
Analog Bus relays, which are on Matrix 2, to close. The optional 34932T
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.
26 Keysight 34931A-34933A User’s Guide
34932T Terminal Block
NOTE
Although they have
separate
screw-type
connectors, rows
labeled the same
on a matrix are
electrically
connected.
Therefore, you can
wire the
same-matrix rows
in two locations.
Although columns are numbered the same on
Matrix 1 and Matrix 2, they are electrically
separate from one another (e.g., Col C13).
W
i
r
e
S
i
z
e
:
2
0
A
W
G
T
y
p
i
c
a
l
1
8
A
W
G
M
a
x
This terminal block with screw-type connections is labeled with the model number
and the abbreviated module name. In addition, space is available on the label for
you to write the slot number.
All modules that connect to the internal DMM are interlock protected. This
means that when an installed module is exposed (no terminal block or cable is
connected), the Analog Bus relays, which are on Matrix 2, are open and
disconnected from the Analog Buses. See page 10 for further information.
Keysight 34931A-34933A User’s Guide 27
34933A Dual/Quad 4x8 Reed Matrix
Using program commands or the front panel of the 34980A, you can configure the
34933A dual/quad 4x8 reed matrix module for differential (2-wire) mode or
single-ended (1-wire) mode.
The 34933A module contains 100 Ω in-rush resistors that are used to protect the
reed relays from reactive loads. If you have applications where in-rush resistors
interfere with measurements, connections are provided on the terminal blocks for
you to bypass the in-rush resistors that are located on the columns. See the
simplified schematics on page 30 and page 35. However, if you choose to bypass
the in-rush resistors, the life of the reed relays that you bypass may be degraded.
Two-Wire Mode
To physically configure the module for 2-wire mode, use the 34933T-001 terminal
block, or a compatible standard or custom cable. If using a standard or custom
cable, make sure you connect interlock pins 17 and 33 on the Matrix 2 D-sub
connector. Refer to the pinout drawing and table on page 32.
In 2-wire mode, the 34933A module contains two matrices, each with 32 2-wire
crosspoint non-latching reed relays organized in a 4-row by 8-column
configuration. Every row and column are made up of two wires each, a high (H)
and a low (L). Each crosspoint relay has a unique channel number representing
the row and column that intersect to create the crosspoint. For example, channel
308 represents the crosspoint connection between row 3 and column 08 (all
columns consisting of two digits; in this case the digits are 08). See the simplified
schematic on page 30.
You can connect any combination of inputs and outputs at the same time.
However, only Matrix 2 in 2-wire mode of this module connects to the Analog
Buses. By closing channels 921 and 922 you can connect rows 5 and 6
respectively to the internal DMM of the 34980A mainframe for voltage and
resistance measurements.
In 2-wire mode, you can close no more than 20 channels simultaneously due to
power dissipation. However, note that Analog Bus relays count half as much as
channel relays in that total. For example, with one Analog Bus relay closed, you
can close up to a maximum of 19 channel relays. If you try to close more than the
allowed number of channels, you will receive an error message.
28 Keysight 34931A-34933A User’s Guide
One-Wire Mode
To physically configure the module in 1-wire mode, use the 34933T-002 terminal
block, or a compatible standard or custom cable. If using a standard or custom
cable, make sure you connect interlock pins 17 and 33 on the Matrix 2 D-sub
connector. Refer to the pinout drawing and table on page 37.
In 1-wire mode, the 34933A module contains four matrices (1 through 4), each
with 32 1-wire crosspoint non-latching reed relays organized in a 4-row by
8-column configuration. Every row and column has one wire each. Each
crosspoint relay has a unique channel number representing the matrix, and the
single-wire row and column that intersect to make the crosspoint. For example,
channel 218 represents Matrix 2, row 1 and column 8. See the simplified
schematic on page 35.
In 1-wire mode, you can close no more than 40 channels simultaneously due to
power dissipation. For example, with one Analog Bus relay closed you can close
up to a maximum of 39 channel relays. If you try to close more than the allowed
number of channels, you will receive an error message.
You can connect any combination of inputs and outputs at the same time.
However, only Matrix 3 and Matrix 4 in 1-wire mode of this module connect to the
Analog Buses. By closing channels 921 and 922 you can connect rows 1 and rows
2 respectively to the internal DMM of the 34980A mainframe for voltage and
resistance measurements.
You can connect multiple matrix modules externally and/or through the Analog
Buses for applications that require large matrices. For information on linking
multiple matrix modules, refer to page 15 of this manual.
When the power is off, matrix relays and Analog Bus relays open.
Keysight 34931A-34933A User’s Guide 29
C2L
C2L
bypass
L
C8L
bypass
L
C8LC2H
C2H
bypass
H
H
L
L
L
L
H
H
H
C1H
C1H
bypassHC1L
C1L
bypass
L
C8H
C8H
bypass
H
C1L
C1L
bypass
L
C8H
C8H
bypass
H
C2L
C2L
bypass
L
C8L
bypass
L
C8L
H
L
L
L
L
H
H
H
C1H
C1H
bypass
H
C2H
C2H
bypass
H
H
H
L
L
Matrix 1
Matrix 2
Col 1H Col 1L Col 2H Col 2L Col 8H Col 8L
Col 1H Col 1L Col 2H Col 2L Col 8H Col 8L
Row 1
Row 2
Row 3
Row 4
Row 5
Row 6
Row 7
Row 8
ABus1
DMM
(MEAS)
ABus2
DMM
(SENS)
ABus3
ABus4
922
923
924
921
H
H
H
H
L
L
L
L
Analog Buses
NOTE: Three-digit channel numbers are derived from the
intersection of the rows and columns, columns having two
digits. The intersection shown here represents Channel
308 (Row 3, Column 8).
NOTE: Although columns are
numbered the same on Matrix 1
and Matrix 2, they are electrically
separate from one another.
NOTE: All series resistors shown
are 100
Ω.
NOTE:
Matrix Relays: Reed non-latching
Analog Bus Relays: Armature
non-latching
34933A Simplified Schematic for Two-Wire Mode
30 Keysight 34931A-34933A User’s Guide
34933A D-Sub Connectors for Two-Wire Mode
For orientation, the D-sub connector
end of the module is facing you.
Matrix 1
Matrix 2
NOTE:
– In this diagram and the
table below, R represents
“row,” and C represents
“column.”
– Bypass” means to bypass
the 100Ω in-rush resistor
that protects the reed
relays.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17
18
19 20
21 22
23
24
25 26
27 28
29 30 31 32
33
34
35
36 37
38
39 40
41
42
43 44 45
46
47 48 49
50
NC
C4H C4L R4H R4L
C5H C5L
NC NC
C7H C7L
C4H
bypass
C4L
bypass
C5H
bypass
C5L
bypass
C7H
bypass
C7L
bypass
C2L
NC
C2H R2H R2L C8H C8L
NC NC
GND
C3H
bypass
C1L
bypass
C1H
bypass
C3L
bypass
C6L
bypass
C6H
bypass
C6L
NC
C3HC3LC1HC1LR3HR3LC6H
NC
R1H R1L
NC
C2H
bypass
C2L
bypass
C8H
bypass
C8L
bypass
50-Pin D-Sub Male Connector
Matrix 1
Description Pin Description Pin Description Pin Description Pin Description Pin Description Pin
R1H 49 C1H 37 C5H 7 C1H bypass 21 C5H bypass 9 GND 33
R1L 50 C1L 38 C5L 8 C1L bypass 22 C5L bypass 10 No Connect pins:
R2H 27 C2H 23 C6H 41 C2H bypass 43 C6H bypass 25
R2L 28 C2L 24 C6L 42 C2L bypass 44 C6L bypass 26
R3H 39 C3H 35 C7H 13 C3H bypass 19 C7H bypass 15
11-12, 17-18,
31-32, 34, and
45-46
R3L 40 C3L 36 C7L 14 C3L bypass 20 C7L bypass 16
R4H 5 C4H 1 C8H 29 C4H bypass 3 C8H bypass 47
R4L 6 C4L 2 C8L 30 C4L bypass 4 C8L bypass 48
Keysight 34931A-34933A User’s Guide 31
Matrix 2
NOTE:
– In this diagram and the
table below, R represents
“row,” and C represents
“column.”
– “Bypass” means to
bypass the 100Ω in-rush
resistor that protects the
reed relays.
18
19 20
21 22
23
24
25 26
27 28
29 30 31 32
33
C2L
NC
C2H R6H R6L C8H C8L
NC NC
Interlock
C3H
bypass
C1L
bypass
C1H
bypass
C3L
bypass
C6L
bypass
C6H
bypass
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17
Interlock
C4H C4L R8H R8L
C5H C5L
NC NC
C7H C7L
C4H
bypass
C4L
bypass
C5H
bypass
C5L
bypass
C7H
bypass
C7L
bypass
34
35
36 37
38
39 40
41
42
43 44 45
46
47 48 49
50
C6L
NC
C3H C3L C1H C1L R7H R7L C6H
NC
R5H R5L
NC
C2H
bypass
C2L
bypass
C8H
bypass
C8L
bypass
50-Pin D-Sub Male Connector
WARNING
Description Pin Description Pin Description Pin Description Pin Description Pin
R5H 49 C2H 23 C7H 13 C4H bypass 3 Interlock 17
R5L 50 C2L 24 C7L 14 C4L bypass 4 Interlock 33
R6H 27 C3H 35 C8H 29 C5H bypass 9 No Connect pins:
R6L 28 C3L 36 C8L 30 C5L bypass 10
R7H 39 C4H 1 C1H bypass 21 C6H bypass 25
R7L 40 C4L 2 C1L bypass 22 C6L bypass 26
R8H 5 C5H 7 C2H bypass 43 C7H bypass 15
R8L 6 C5L 8 C2L bypass 44 C7L bypass 16
C1H 37 C6H 41 C3H bypass 19 C8H bypass 47
11-12, 18, 31-32, 34,
and 45-46
C1L 38 C6L 42 C3L bypass 20 C8L bypass 48
As a safety feature, interlock pins (17 and 33) must be shorted to enable the
Analog Bus relays, which are on Matrix 2, to close. The optional 34933T-001
(for 2-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.
32 Keysight 34931A-34933A User’s Guide
34933T-001 Terminal Block for Two-Wire Mode
NOTE
NOTE
This terminal block with screw-type connections is labeled with the model number
and the abbreviated module name. In addition, space is available on the label for
you to write the slot number.
All modules that connect to the internal DMM are interlock protected. This
means that when an installed module is exposed (no terminal block or cable is
connected), the Analog Bus relays, which are on Matrix 2, are open and
disconnected from the Analog Buses. See page 10 for further information.
If you are using an Keysight terminal block to connect your DUT to this module
be sure to use the 34933T-001 terminal block that corresponds to the 2-wire
configuration mode. Note that an error will not be generated if you have installed
a terminal block that doesn't match the present module configuration.
Keysight 34931A-34933A User’s Guide 33
Although columns are numbered
the same on Matrix 1 and Matrix 2,
they are electrically separate from
one another (e.g., Col C2).
COLUMN
W
i
r
e
S
i
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e
:
2
0
A
W
G
T
y
p
i
c
a
l
1
8
A
W
G
M
a
x
When using the 34933T terminal block for 2-wire mode, access is provided to the
bypass columns through the columns labeled C9 through C16. Follow this wiring
convention shown in the table below for both matrices.
Terminal marked... Connects to... Terminal marked... Connects to...
C9H C1Hbypass C13H C5H bypass
C9L C1L bypass C13L C5L bypass
C10H C2H bypass C14H C6H bypass
C10L C2L bypass C14L C6L bypass
C11H C3H bypass C15H C7H bypass
C11L C3L bypass C15L CC7L bypass
C12H C4H bypass C16H C8H bypass
C12L C4L bypass C16L C8L bypass
34 Keysight 34931A-34933A User’s Guide
H
H
H
H
ABus1
DMM
(MEAS)
921
ABus2
DMM
(SENS)
922
ABus3
923
ABus4
924
H
H
L
L
H
H
L
L
H
H
H
H
2C2L
2C2
bypass 2C8
2C8
bypass2C1
2C1
bypass
L
L
H
H
1C2
1C2
bypass 1C8
1C8
bypass1C1
1C1
bypass
3C2
3C2
bypass 3C8
3C8
bypass3C1
3C1
bypass
4C2
4C2
bypass 4C8
4C8
bypass4C1
4C1
bypass
Matrix 1
Matrix 3
Matrix 4
Matrix 2
Row 1
Row 2
Row 3
Row 4
Row 1
Row 2
Row 3
Row 4
Row 1
Row 2
Row 3
Row 4
Row 1
Row 2
Row 3
Row 4
Analog Buses
Row 1
Row 1
Row 2
Row 2
Row 3
Row 3
Row 4
Row 4
L
L
L
L
L
L
L
L
NOTE:
Matrix Relays: Reed non-latching
Analog Bus Relays: Armature non-latching
NOTE: Although rows are numbered the
same across the matrices, they are
electrically separate from one another.
Channel 218
(Matrix 2, Row 1, Column 8)
NOTE: All series resistors shown are 100Ω.
NOTE: Three-digit
channel numbers are
derived from a specific
matrix number and the
intersection of rows and
columns on that matrix.
The channel shown here
is 132 (Matrix 1, Row 3,
Column 2.)
34933A Simplified Schematic for One-Wire Mode
Keysight 34931A-34933A User’s Guide 35
34933A D-Sub Connectors for One-Wire Mode
For orientation, the D-sub connector
end of the module is facing you.
Matrices 3 & 4Matrices 1 & 2
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17
NC
1C4 2C 4 1R 4 2R4
1C5 2C5
NC NC
1C7 2C7
1C4
bypass
2C4
bypass
1C5
bypass
2C5
bypass
1C7
bypass
2C7
bypass
18
19 20
21 22
23
24
25 26
27 28
29 30 31 32
33
2C2
NC
1C2 1R2 2R2 1C8 2 C8
NC NC
GND
1C3
bypass
2C1
bypass
1C1
bypass
2C3
bypass
2C6
bypass
1C6
bypass
34
35
36 37
38
39 40
41
42
43 44 45
46
47 48 49
50
2C6
NC
1C3 2C3 1C1 2C1 1R3 2R3 1C6
NC
1R1 2R1
NC
1C2
bypass
2C2
bypass
1C8
bypass
2C8
bypass
50-Pin D-Sub
Male Connector
NOTE
Matrices 1 and 2
Description Pin Description Pin Description Pin Description Pin Description Pin
1R1 49 1C2 23 1C7 13 1C4 bypass 3 GND 33
1R2 27 2C2 24 2C7 14 2C4 bypass 4 No connect pins:
1R3 39 1C3 35 1C8 29 1C5 bypass 9
1R4 5 2C3 36 2C8 30 2C5 bypass 10
11-12, 17-18, 31-32,
34, and 45-46
2R1 50 1C4 1 1C1 bypass 21 1C6 bypass 25
2R2 28 2C4 2 2C1 bypass 22 2C6 bypass 26
2R3 40 1C5 7 1C2 bypass 43 1C7 bypass 15
2R4 6 2C5 8 2C2 bypass 44 2C7 bypass 16
1C1 37 1C6 41 1C3 bypass 19 1C8 bypass 47
2C1 38 2C6 42 2C3 bypass 20 2C8 bypass 48
Conventions for these drawings and tables as they relate to pinout information:
– 2R4 means Matrix 2, Row 4.
– 1C5 means Matrix 1, Column 5
– 4C2 bypass means: Matrix 4, Column 2, and the connection bypasses the
100Ω in-rush resistor that protects the reed relays
36 Keysight 34931A-34933A User’s Guide
Matrices 3 and 4
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17
18
19 20
21 22
23
24
25 26
27 28
29 30 31 32
33
34
35
36 37
38
39 40
41
42
43 44 45
46
47 48 49
50
Interlock
3C4 4C4 3R4 4R4
3C5 4C5
NC NC
3C7 4C7
3C4
bypass
4C4
bypass
3C5
bypass
4C5
bypass
3C7
bypass
4C7
bypass
4C2
NC
3C2 3R2 4R2 3C8 4C8
NC NC
Interlock
3C3
bypass
4C1
bypass
3C1
bypass
4C3
bypass
4C6
bypass
3C6
bypass
4C6
NC
3C3 4C3 3C1 4C1 3R3 4R3 3C6
NC
3R1 4R1
NC
3C2
bypass
4C2
bypass
3C8
bypass
4C8
bypass
50-Pin D-Sub
Male Connector
WARNING
Description Pin Description Pin Description Pin Description Pin Description Pin
3R1 49 3C2 23 3C7 13 3C4 bypass 3 Interlock 17
3R2 27 4C2 24 4C7 14 4C4 bypass 4 Interlock 33
3R3 39 3C3 35 3C8 29 3C5 bypass 9 No connect pins:
3R4 5 4C3 36 4C8 30 4C5 bypass 10
4R1 50 3C4 1 3C1 bypass 21 3C6 bypass 25
4R2 28 4C4 2 4C1 bypass 22 4C6 bypass 26
4R3 40 3C5 7 3C2 bypass 43 3C7 bypass 15
4R4 6 4C5 8 4C2 bypass 44 4C7 bypass 16
3C1 37 3C6 41 3C3 bypass 19 3C8 bypass 47
4C1 38 4C6 42 4C3 bypass 20 4C8 bypass 48
11-12, 18, 31-32, 34,
and 45-46
As a safety feature, interlock pins (17 and 33) must be shorted to enable the
Analog Bus relays, which are on Matrix 2, to close. The optional 34933T-002
(for 1-wire) terminal block shorts these pins for you. This safety feature
protects inadvertent routing of high voltages from the Analog Buses to the
D-sub connector of the module.
Keysight 34931A-34933A User’s Guide 37
34933T-002 Terminal Block for One-Wire Mode
NOTE
NOTE
NOTE: Analog Bus
connections are
on Matrix 3 and
Matrix 4.
W
i
r
e
S
i
z
e
:
2
0
A
W
G
T
y
p
i
c
a
l
1
8
A
W
G
M
a
x
This terminal block with screw-type connections is labeled with the model number
and the abbreviated module name. In addition, space is available on the label for
you to write the slot number.
All modules that connect to the internal DMM are interlock protected. This
means that when an installed module is exposed (no terminal block or cable is
connected), the Analog Bus relays and current channels are open and
disconnected from the Analog Buses. See page 10 for further information.
If you are using an Keysight terminal block to connect your DUT to this module
be sure to use the 34933T-002 terminal block that corresponds to the 1-wire
configuration mode. Note that an error will not be generated if you have installed
a terminal block that doesn't match the present module configuration.
38 Keysight 34931A-34933A User’s Guide
Index
Numerics
34931A
channel numbering
connector pinouts
description
linking multiple modules
programming examples
simplified schematic
terminal block
wiring log
34932A
channel numbering
connector pinouts
description
linking multiple modules
programming examples
simplified schematic
terminal block
wiring log
34933A
channel numbering
connector pinouts
description
linking multiple modules
programming examples
simplified schematic
terminal block
wiring log
,
17
,
,
21
,
23
,
,
27
,
28
, 33,
, 33,
,
,
19
,
21
,
,
25
,
27
,
, 31,
, 30,
38
38
11
11
11
,
,
,
,
18
,
24
,
36
O
operating considerations, 10
P
pinouts
15
11
34931A
34932A
34933A
,
19
,
25
, 31,
S
safety notices, 4
15
11
15
11
35
36
C
connector pinouts
34931A
34932A
34933A
,
19
,
25
, 31,
36
D
D-sub pinouts
34931A
34932A
34933A
Keysight 34931A-34933A User’s Guide 39
,
19
,
25
, 31,
36
THIS PAGE HAS BEEN INTENTIONALLY LEFT BLANK.
40 Keysight 34931A-34933A User’s Guide
This information is subject to change
without notice. Always refer to the
Keysight website for the latest
revision.
© Keysight Technologies 2008-2019
Edition 3, July 1, 2019
Printed in Malaysia
*34980-90031*
34980-90031
www.keysight.com
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