Agilent 34937A-34939A
General Purpose
Switch Modules
User’s Guide
Agilent Technologies, Inc.
Printed in Malaysia
Edition 1
June 2008 E0608
*34980-90037*
34980-90037
Agilent Technologies
Notices
© Agilent Technologies, Inc. 2008
No part of this manual may be reproduced
in any form or by any means (including
electronic storage and retrieval or translation into a foreign language) without prior
agreement and written consent from
Agilent Technologies, Inc. as governed
by United States and international copyright laws.
Manual Part Number
34980-90037
Edition
First Edition, June 2008
Printed in Malaysia
Agilent Technologies, Inc.
3501 Stevens Creek Blvd
Santa Clara, CA 95052 USA
Microsoft® and Windows® are U.S. registered trademarks of Microsoft Corporation.
Software Revision
This guide is valid for the firmware that
was installed in the instrument at the time
of manufacture. However, upgrading the
firmware may add or change product
features. For the latest firmware and
documentation, go to the product page at:
www.agilent.com/find/34980A
Warranty
The material contained in this document is provided “as is,” and is subject to being changed, without notice,
in future editions. Further, to the maximum extent permitted by applicable
law, Agilent disclaims all warranties,
either express or implied, with regard
to this manual and any information
contained herein, including but not
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Documentation).
Safety Notices
CAUTION
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.
WARNING
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.
ii Agilent 34937A-34939A General Purpose Switch Modules User’s Guide
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. Agilent 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.
Do Not Modify the Instrument
Do not install substitute parts or perform
any unauthorized modification to the product. Return the product to an Agilent 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.
Safety Symbols
Alternating current
Frame or chassis
terminal
Standby supply. Unit is
not completely
disconnected from ac
mains when switch is off
Caution, risk of electric
shock
Caution, refer to
accompanying description
Waste Electrical and Electronic
Equipment (WEEE) Directive
2002/96/EC
This product complies with the WEEE
Directive (2002/96/EC) marking requirement. The affixed product label (see above)
indicates that you must not discard this
electrical/electronic product in domestic
household waste.
Product Category: With reference to the
equipment types in the WEEE directive
Annex 1, this product is classified as a
“Monitoring and Control instrumentation”
product.
To return unwanted products, contact
your local Agilent office, or go to
www.agilent.com/environment/product
for more information.
Technical Support
If you have questions about your shipment,
or if you need information about warranty,
service, or technical support, contact
Agilent Technologies:
In the United States: (800) 829-4444
In Europe: 31 20 547 2111
In Japan: 0120-421-345
Or go to www.agilent.com/find/assist
for information on contacting Agilent in
your country of specific location. You can
also contact your Agilent Technologies
Representative.
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.
Agilent 34937A-34939A General Purpose Switch Modules User’s Guide iii
The Declaration of Conformity (DoC) for the 34980A mainframe
instrument can be found on page iii in the 34980A Mainframe User’s
Guide. That DoC applies to the 34980A mainframe and all available
plug- in modules.
iv Agilent 34937A-34939A General Purpose Switch Modules User’s Guide
Contents
General Purpose Switch Modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
Operating Considerations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
Electrical Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
Temperature Sensor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
Switching Reactive Loads. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
Hardware Power-Fail Jumper. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
34937A, 34938A and 34939A SCPI Programming Examples. . . . . . . . . . . . . . . . . . . . . . . . .4
Opening and Closing Channels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
Reading Jumper State and System Identity. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
Reading Cycle Count and Resetting Modules to Power-On State . . . . . . . . . . . . . . . . .5
34937A 32-Channel GP Switch Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
34937A Simplified Schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
34937A D-Sub Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
34937T Terminal Block . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
34938A 20-Channel High-Current GP Switch Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
34938A Simplified Schematic. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
34938A D-Sub Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
34938T Terminal Block . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
34939A 64-Channel High-Density Form-A GP Switch Module . . . . . . . . . . . . . . . . . . . . . .12
34939A Simplified Schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
34939A D-Sub Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
34939T Terminal Block . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
Agilent 34937A-34939A General Purpose Switch Modules User’s Guide v
vi Agilent 34937A-34939A General Purpose Switch Modules User’s Guide
General Purpose Switch Modules
This User’s Guide covers the following two plug- in modules for the Agilent
34980A Multifunction Switch/Measure Unit:
34937A 28-channel Form C and 4-channel Form A
34938A 28-channel 5-amp Form A
34939A 64-Channel High-Density Form A
• The 34937A provides independent control of 32 relays, including:
• Twenty- eight Form C relays, each rated for 1 A at 60 W per channel
• Four Form A (SPST) relays, each rated for 5 A at 150 W per
channel.
• The 34938A, for power switching applications, offers 20 Form A relays,
each rated for 5 A at 150 W per channel.
• The 34939A provides independent control of 64 Form- A relays, each
rated for 1 A at 60 W per channel.
General Purpose Switch Modules
All three modules utilize armature- latching relays.
You can use these general- purpose switches in your 34980A mainframe for
device actuation, digital output, signal routing, or — combined with other
switch modules — to create flexible switching topologies. You can close
multiple channels at the same time. These modules do not connect to the
34980A’s analog buses.
Agilent 34937A-34939A General Purpose Switch Modules User’s Guide 1
Operating Considerations.
Operating Considerations.
WARNING
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 GP modules.
Te mperature Sensor
A temperature sensor on these modules triggers system interrupts when
high- carry current- induced heat on the modules is excessive and sets the
HOT annunciator on the front panel. This over-temperature situation
generates an SRQ event when the factory- set 70
is up to the user to determine what, if any, action should be taken.
Do not connect either the 34937A, 34938A or 34939A module
directly to a mains power outlet. If it is necessary to switch a mains
voltage or any circuit where a large inductive load may be
switched, you must add signal conditioning elements to reduce the
potential transients before they reach the module or the Analog
Buses.
o
C threshold is reached. It
Switching Reactive Loads
Reactive loads (those that include significant inductance or capacitance)
can cause voltage spikes or current spikes during switching operations.
The general purpose modules are designed for switching reactive loads.
The optional 34937T and 34938T terminal blocks have solder pads for
adding snubber circuits for the 5 A relays to reduce the reactive
transients. See the drawings on page 8 and page 11 for the locations of
snubber circuit pads and installation information about a snubber circuit.
Hardware Power-Fail Jumper
A hardware jumper on the 34937A and 34938A modules allows you to
define the power- failure states for the modules’ 5 A latching relays.
Depending on the position of the jumper, the 5 A relays will either open
or maintain state when system power failure occurs.
On the 34939A module, a hardware jumper allows you to define the
power- failure state affecting all 64 of the module’s 1 A latching relays.
Depending on the position of the jumper, these relays will either open or
maintain state when system power failure occurs.
2 Agilent 34937A-34939A General Purpose Switch Modules User’s Guide
Operating Considerations.
The jumpers are positionable across pins 1–2 (“Open” position) or across
pins 2–3 (“Maintain” position). When shipped from the factory, the
power- fail jumper is in the Maintain position (i.e. all relays maintain their
present state when power fails).
WARNING
Before changing the position of the jumper, remove external
connections from the module. Wait five to ten seconds to allow the
module’s internal capacitors to discharge.
After a five- to ten-second delay, remove the sheet metal cover from the
module and move the position of the jumper mounted on the module. See
the figure below for the jumper’s location on the module.
1
O
p
e
n
P
o
w
1
2
2
M
a
n
i
t
n
a
3
3
e
r
D
o
S
w
n
t
i
t
a
e
5
0
2
U
1
U
0
3
1
C
0
3
Agilent 34937A-34939A General Purpose Switch Modules User’s Guide 3
34937A, 34938A and 34939A SCPI Programming Examples
34937A, 34938A and 34939A SCPI Programming Examples
The programming examples below provide you with SCPI command
examples to use for actions specific to the general purpose switch
modules.
The slot and channel addressing scheme used in these examples follow the
form sccc where s is the mainframe slot number (1 through 8) and ccc is
the channel number.
For complete information on the SCPI commands used to program the
34980A, and for example programs, refer to the Agilent 34980A
Programmer’s Reference contained on the 34980A Product Reference CD.
Opening and Closing Channels
Example: Closing and opening channels The first two commands close
channel 3 for a module in slot 2, then channel 5 for that module.
The last command opens both channel 3 and channel 5.
ROUTe:CLOSe (@2003)
ROUTe:CLOSe (@2005)
ROUTe:OPEN (@2003,2005)
Example: Querying channels for open or closed state The following command
returns a 1 (true) or 0 (false) state of channel 016 for a module in slot 3.
ROUTe:CLOSe (@3016)
ROUTe:CLOSe? (@3016) !Returns a 1
ROUTe:OPEN? (@3016) !Returns a 0
Reading Jumper State and System Identity
Example: Querying the power-failure state of 5 A relays The following command
returns the position of the power- fail jumper, either “MAIN” (all relays
maintain their present state when power fails) or “OPEN” (all relays open
when power fails) for a module in slot 4. If this command is sent to a
module other than the 34937A or 34938A, “NONE” is returned (no error is
generated). In particular, the position of the power-fail jumper on the
34939A module cannot be queried using this commmand.
SYSTem:MODule:PFAil:JUMPer:AMP5? 4
Example: Querying the system for module identify (all modules) The following
command returns the identify of the module installed in slot 7.
SYSTem:CTYPe? 7
4 Agilent 34937A-34939A General Purpose Switch Modules User’s Guide
34937A, 34938A and 34939A SCPI Programming Examples
Reading Cycle Count and Resetting Modules to Power-On State
Example: Reading the cycle count for a relay (all switch modules) The following
command returns the relay cycle count on channel 7 and channel 16 for a
module in slot 1.
DIAGnostic:RELay:CYCLes? (@1007,1016)
Example: Clearing the cycle count for a relay (all switch modules) The following
command resets the relay cycle count on channels 7 and 16 for a module
in slot 1.
DIAGnostic:RELay:CYCLes:CLEar (@1007,1016)
Example: Resetting Module(s) to power-on state (all modules) The following
command resets a module in slot 4 to its power- on state.
SYSTem:CPON 4
Agilent 34937A-34939A General Purpose Switch Modules User’s Guide 5
34937A 32-Channel GP Switch Module
34937A 32-Channel GP Switch Module
The 34937A general- purpose switch module provides independent control
of:
• Twenty-eight Form C (SPDT) latching relays rated at 1 A
• Four Form A (SPST) latching relays rated at 5 A. You can set the
power- failure state for these 5 A relays (see “Hardware Power- Fail
Jumper” on page 2).
NOTE
34937A Simplified Schematic
NC
NO
COM
NC
NO
COM
Channel 001
(1A Form C)
Channel 028
(1A Form C)
A temperature sensor on these modules triggers system interrupts
when high-carry current-induced heat on the modules reaches a
threshold of 70
o
C. See description of the “HOT” annunciator on
page 2.
NO
Channel 029
(5A Form A)
COM
NO
Channel 032
(5A Form A)
COM
6 Agilent 34937A-34939A General Purpose Switch Modules User’s Guide
34937A 32-Channel GP Switch Module
34937A D-Sub Connectors
Bank 1
For orientation, the D-sub connector end
Bank 1
Bank 2
of the module is facing you.
4NO 1NO
4CReserved 11C 7C 3C 12C 8C 1C 13C 9C 5C
24
23
39 40
25 26
41
13NO 9NO 5NO 2NO 14NO 10NO 30NO 30C
14C 10C 6C GND
27 28
13NCGND 11NO 11NC 7NC 3NC 12NC 8NC 4NC 1NC 9NC 5NC 2NC
43 44 45
42
2C
29 30 31 32
14NC 10NC 6NC 6NO
47 48 49
46
35
19 20
36 37
3NO
21 22
38
29NO 29C 7NO 12NO 8NO
1 2 3 4 5 6 7 8 9 1011121314151617
18
34
NC
33
50
Channel Pin Channel Pin Channel Pin Channel Pins Channel Pins Channel Pin
1 NC 42 4 NC 41 7 NC 37 10 NC 48 13 NC 43 30 NO 15
1 Common 25 4 Common 24 7 Common 20 10 Common 31 13 Common 26 30 Common 16
1 NO 8 4 NO 7 7 NO 3 10 NO 14 13 NO 9 Reserved 18
2 NC 46 5 NC 45 8 NC 40 11 NC 36 14 NC 47 GND 33
2 Common 29 5 Common 28 8 Common 23 11 Common 19 14 Common 30 GND 34
2 NO 12 5 NO 11 8 NO 6 11 NO 35 14 NO 13 No Connect 17
3 NC 38 6 NC 49 9 NC 44 12 NC 39 29 NO 1
3 Common 21 6 Common 32 9 Common 27 12 Common 22 29 Common 2
3 NO 4 6 NO 50 9 NO 10 12 NO 5
Bank 2
31NO 31C 21NO
1 2 3 4 5 6 7 89 1011121314151617
18
19 20
34
35
36 37
17NO
26NO 22NO
21 22
38
27NO 23NO
15NO
18NO
18CReserved 25C 21C 17C 26C 22C 15C 27C 23C 19C 16C 28C 24C 20C GND
24
23
39 40
25 26
27NCGND 25NO 25NC 21NC 17NC 26NC 22NC 18NC 15NC 23NC 19NC 16NC
41
42
16NO 28NO 24NO 32NO 32C
19NO
27 28
43 44 45
29 30 31 32
28NC
46
24NC 20NC
47 48 49
Channel Pin Channel Pin Channel Pin Channel Pins Channel Pins Channel Pin
15 NC 42 18 NC 41 21 NC 37 24 NC 48 27 NC 43 32 NO 15
15 Common 25 18 Common 24 21 Common 20 24 Common 31 27 Common 26 32 Common 16
15 NO 8 18 NO 7 21 NO 3 24 NO 14 27 NO 9 Reserved 18
16 NC 46 19 NC 45 22 NC 40 25 NC 36 28 NC 47 GND 33
16 Common 29 19 Common 28 22 Common 23 25 Common 19 28 Common 30 GND 34
16 NO 12 19 NO 11 22 NO 6 25 NO 35 28 NO 13 No Connect 17
17 NC 38 20 NC 49 23 NC 44 26 NC 39 31 NO 1
17 Common 21 20 Common 32 23 Common 27 26 Common 22 31 Common 2
17 NO 4 20 NO 50 23 NO 10 26 NO 5
NC
50-Pin D-Sub
Male Connector
33
20NO
50
Agilent 34937A-34939A General Purpose Switch Modules User’s Guide 7
34937A 32-Channel GP Switch Module
34937T Terminal Block
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.
The 34980A Product Reference CD (shipped with the instrument) contains
a 34937T Wiring Log for you to document your wiring configuration for
this module. You can open the wiring log file in Microsoft
Adobe
®
Acrobat® format.
®
Excel® or
i
e
S
i
W
2
1
:
r
z
e
i
c
p
T
G
W
0
A
8
A
W
l
y
a
a
x
M
G
Pads for user-supplied snubber
circuity to alleviate reactive
transients. The circuits may
consist of resistors, capacitors,
varistors, or other elements as
needed to reduce the switching
voltage and current transients
inherent in reactive circuits.
8 Agilent 34937A-34939A General Purpose Switch Modules User’s Guide
34938A 20-Channel High-Current GP Switch Module
34938A 20-Channel High-Current GP Switch Module
The 34938A high- current GP switch module provides twenty 5 A Form A
(SPST) relays for general purpose switching needs. You can set the
power- failure state for these 5 A relays (see “Hardware Power- Fail
Jumper” on page 2).
NOTE
34938A Simplified Schematic
NO
COM
NO
COM
A temperature sensor on these modules triggers system interrupts
when high-carry current-induced heat on the modules reaches a
threshold of 70
page 2.
o
C. See description of the “HOT” annunciator on
Channel 001
(5A Form A)
Channel 020
(5A Form A)
Agilent 34937A-34939A General Purpose Switch Modules User’s Guide 9
34938A 20-Channel High-Current GP Switch Module
34938A D-Sub Connectors
Bank 1
6NO 6C 1NO 1C 7NO 7C
1 2 3 4 5 6 7 89 1011121314151617
Reserved
1NO 1C 7NO 7C 2NO
18
19 20
34
35
36 37
Channel Pin Channel Pin Channel Pin Channel Pins Channel Pins
1NO 3 3NO 25 5NO 31 7NO 37 9NO 43
1Common 4 3Common 26 5Common 32 7Common 38 9Common 44
1NO 19 4NO 13 6NO 1 8NO 39 10NO 47
1Common 20 4Common 14 6Common 2 8Common 40 10Common 48
2NO 7 4NO 29 6NO 35 8NO 41 10NO 49
2Common 8 4Common 30 6Common 36 8Common 42 10Common 50
2NO 23 4NO 45 7NO 5 9NO 11 Reserved 18
2Common 24 4Common 46 7Common 6 9Common 12 GND 33
3NO 9 5NO 15 7NO 21 9NO 27 GND 34
3Common 10 5Common 16 7Common 22 9Common 28 No Connect 17
21 22
38
2NO
23
39 40
3NO 3C 9NO 9C 4NO 4C 5NO 5C
2C
3NO
2C
24
3C 9NO 9C 4NO 4C 5NO 5C GND
41
25 26
42
27 28
9NOGND 6NO 6C 7NO 7C 8NO 8C 8NO 8C 9C 4NO 4C
43 44 45
29 30 31 32
46
Bank 1
Bank 2
For orientation, the D-sub connector
end of the module is facing you.
NC
50-Pin D-Sub
Male Connector
33
10NO 10C 10NO 10C
47 48 49
50
Bank 2
16NO 16C 11NO 11C 17NO 17C
1 2 3 4 5 6 7 8 9 1011121314151617
18
19 20
34
35
21 22
36 37
12NO
23
38
39 40
Channel Pin Channel Pin Channel Pin Channel Pins Channel Pins
11NO 3 13NO 25 15NO 31 17NO 37 19NO 43
11Common 4 13Common 26 15Common 32 17Common 38 19Common 44
11NO 19 14NO 13 16NO 1 18NO 39 20NO 47
11Common 20 14Common 14 16Common 2 18Common 40 20Common 48
12NO 7 14NO 29 16NO 35 18NO 41 20NO 49
12Common 8 14Common 30 16Common 36 18Common 42 20Common 50
12NO 23 14NO 45 17NO 5 19NO 11 Reserved 18
12Common 24 14Common 46 17Common 6 19Common 12 GND 33
13NO 9 15NO 15 17NO 21 19NO 27 GND 34
13Common 10 15Common 16 17Common 22 19Common 28 No Connect 17
13NO 13C 19NO 19C 14NO 14C 15NO 15C
12C
13NO
12CReserved 11NO 11C 17NO 17C 12NO
24
13C 19NO 19C 14NO 14C 15NO 15C GND
41
25 26
42
27 28
19NOGND 16NO 16C 17NO 17C 18NO 18C 18NO 18C 19C 14NO 14C
43 44 45
29 30 31 32
46
20NO 20C 20NO 20C
47 48 49
NC
50-Pin D-Sub
Male Connector
33
50
10 Agilent 34937A-34939A General Purpose Switch Modules User’s Guide
34938T Terminal Block
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.
The 34980A Product Reference CD (shipped with the instrument) contains
a 34938T Wiring Log for you to document your wiring configuration for
this module. You can open the wiring log file in Microsoft
Adobe
®
Acrobat
®
format.
34938A 20-Channel High-Current GP Switch Module
®
Excel® or
S
i
z
:
e
e
i
W
r
i
c
p
l
a
0
T
G
2
A
W
y
x
8
1
a
M
G
A
W
Pads for user-supplied snubber circuity to
alleviate reactive transients. The circuits may
consist of resistors, capacitors, varistors,
or other elements as needed to reduce the
switching voltage and current transients
inherent in reactive circuits.
Agilent 34937A-34939A General Purpose Switch Modules User’s Guide 11
34939A 64-Channel High-Density Form-A GP Switch Module
34939A 64-Channel High-Density Form-A GP Switch Module
The 34939A high- density GP switch module provides sixty- four 1 A Form
A (SPST) relays for general purpose switching needs. You can set the
power- failure state for these relays (see “Hardware Power- Fail Jumper” on
page 2).
NOTE
34939A Simplified Schematic
NO
COM
NO
COM
A temperature sensor on these modules triggers system interrupts
when high-carry current-induced heat on the modules reaches a
threshold of 70
page 2.
o
C. See description of the “HOT” annunciator on
Channel 001
(1A Form A)
Channel 064
(1A Form A)
12 Agilent 34937A-34939A General Purpose Switch Modules User’s Guide
34939A D-Sub Connectors
34939A 64-Channel High-Density Form-A GP Switch Module
Bank 1
Bank 2
Bank 1
For orientation, the D-sub connector
end of the module is facing you.
1 2 3 4 5 6 7 8 9 1011121314151617
21
22 23
40
41
42 43
NC 1C 1NO 2C 2NO NC NC NC
60
61 62
24 25
63 64
26
27
28 29
44
45 46
65
48
47
66
67 68
30 31
49 50 51
GND 32C 32NO
Res.
69 70
32 33 34 35
52
NC NC NC NC
NC
71 72 73 74
53 54 55
27C4C 4NO 7C 7NO 10C 10NO 16NO 18C 18NO 21C 21NO 24C 24NO16C13C 13NO 27NO 30NO30C
36
56
75
18
28C3C 3NO 6C 6NO 9C 9NO 15NO 19C 19NO 22C 22NO 25C 25NO15C12C 12NO 28NO NC
37
29C5C 5NO 8C 8NO 11C 11NO 17NO 20C 20NO 23C 23NO 26C 26NO17C14C 14NO 29NO NCNC
57 5958
76
19
38
39
31C 31NO
77 78
20
78-Pin D-Sub
Male Connector
Channel Pin Description Pin Description Pin Description Pin Description Pin Description Pin
1 NO 62 8 NO 44 15 NO 30 22 NO 34 29 NO 58 No Connect 67
1 Common 61 8 Common 43 15 Common 29 22 Common 33 29 Common 57 No Connect 70
2 NO 64 9 NO 26 16 NO 10 23 NO 54 30 NO 20 No Connect 71
2 Common 63 9 Common 25 16 Common 9 23 Common 53 30 Common 19 No Connect 72
3 NO 22 10 NO 6 17 NO 50 24 NO 16 31 NO 78 No Connect 73
3 Common 21 10 Common 5 17 Common 49 24 Common 15 31 Common 77 No Connect 74
4 NO 2 11 NO 46 18 NO 12 25 NO 36 32 NO 76
Chassis GND 68
4 Common 1 11 Common 45 18 Common 11 25 Common 35 32 Common 75 Reserved 69
5 NO 42 12 NO 28 19 NO 32 26 NO 56 No Connect 39
5 Common 41 12 Common 27 19 Common 31 26 Common 55 No Connect 40
6 NO 24 13 NO 8 20 NO 52 27 NO 18 No Connect 59
6 Common 23 13 Common 7 20 Common 51 27 Common 17 No Connect 60
7 NO 4 14 NO 48 21 NO 14 28 NO 38 No Connect 65
7 Common 3 14 Common 47 21 Common 13 28 Common 37 No Connect 66
Agilent 34937A-34939A General Purpose Switch Modules User’s Guide 13
34939A 64-Channel High-Density Form-A GP Switch Module
r
Bank 2
Bank 1
Bank 2
For orientation, the D-sub connector
end of the module is facing you.
1 2 3 4 5 6 7 8 91011121314151617
21
22 23
40
41
42 43
NC 63C 63NO 64C 64NO NC NC NC GND Res. NC 38C 38NO
60
61 62
24 25
44
63 64
26
45 46
65
27
28 29
48
47
66
67 68
30 31
49 50 51
69 70
32 33 34 35
53 54 55
52
NC NC NC NC 37C 37NO
71 72 73 74
33C58C 58NO 61C 61NO 52C 52NO 46NO 48C 48NO 39C 39NO 42C 42NO46C55C 55NO 33NO 36NO36C
36
56
75
18
34C57C 57NO 60C 60NO 51C 51NO 45NO 49C 49NO 40C 40NO 43C 43NO45C54C 54NO 34NO NC
37
35C59C 59NO 62C 62NO 53C 53NO 47NO 50C 50NO 41C 41NO 44C 44NO47C56C 56NO 35NO NCNC
57 5958
76
19
38
77 78
20
78-Pin D-Sub
Male Connecto
39
Channel Pin Description Pin Description Pin Description Pin Description Pin Description Pin
33 NO 18 40 NO 34 47 NO 50 54 NO 28 61 NO 4 No Connect 67
33 Common 17 40 Common 33 47 Common 49 54 Common 27 61 Common 3 No Connect 70
34 NO 38 41 NO 54 48 NO 12 55 NO 8 62 NO 44 No Connect 71
34 Common 37 41 Common 53 48 Common 11 55 Common 7 62 Common 43 No Connect 72
35 NO 58 42 NO 16 49 NO 32 56 NO 48 63 NO 62 No Connect 73
35 Common 57 42 Common 15 49 Common 31 56 Common 47 63 Common 61 No Connect 74
36 NO 20 43 NO 36 50 NO 52 57 NO 22 64 NO 64
Chassis GND 68
36 Common 19 43 Common 35 50 Common 51 57 Common 21 64 Common 63 Reserved 69
37 NO 78 44 NO 56 51 NO 26 58 NO 2 No Connect 39
37 Common 77 44 Common 55 51 Common 25 58 Common 1 No Connect 40
38 NO 76 45 NO 30 52 NO 6 59 NO 42 No Connect 59
38 Common 75 45 Common 29 52 Common 5 59 Common 41 No Connect 60
39 NO 14 46 NO 10 53 NO 46 60 NO 24 No Connect 65
39 Common 13 46 Common 9 53 Common 45 60 Common 23 No Connect 66
14 Agilent 34937A-34939A General Purpose Switch Modules User’s Guide
34939T Terminal Block
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.
The 34980A Product Reference CD (shipped with the instrument) contains
a 34939T Wiring Log for you to document your wiring configuration for
this module. You can open the wiring log file in Microsoft
Adobe
®
Acrobat
2
1
C NO
C NO
C NO
C NO
8
7
®
format.
3456
C NO C NO C NO C NO
C NO C NO C NO C NO
9101112
34939A 64-Channel High-Density Form-A GP Switch Module
®
Excel® or
34
33
C NO
C NO
39
35 36 37 38
C NO
C NO C NO C NO C NO
C NO
C NO C NO C NO C NO
40
41 42 43 44
46
e
i
i
W
2
1
:
S
z
r
e
i
T
c
p
G
l
y
a
0
A
W
8
G
A
W
x
a
M
13
C NO
C NO
19
25
C NO
C NO
31
14
15 16 17 18
C NO
C NO C NO C NO C NO
C NO
C NO C NO C NO C NO
20
21 22 23 24
26
27 28 29 30
C NO
C NO C NO C NO C NO
C NO
32
45
C NO
C NO
51
57
C NO
C NO
63
47 48 49 50
C NO
C NO C NO C NO C NO
C NO
C NO C NO C NO C NO
52
53 54 55 56
58
59 60 61 62
C NO
C NO C NO C NO C NO
C NO
64
Agilent 34937A-34939A General Purpose Switch Modules User’s Guide 15
34939A 64-Channel High-Density Form-A GP Switch Module
16 Agilent 34937A-34939A General Purpose Switch Modules User’s Guide
Index
Index
Numerics
34929A
pinouts, 13
34937A
connector pinouts, 7
description, 1, 6
simplified schematic, 6
snubber circuitry, 8
terminal block, 8
wiring log, 8
34938A
connector pinouts, 10
description, 1, 9
simplified schematic, 9
snubber circuitry, 11
terminal block, 11
wiring log, 11
34939A
connector pinouts, 13
description, 1, 12
simplified schematic, 12
terminal block, 15
wiring log, 15
C
connector pinouts
34937A, 7
34938A, 10
34939A, 13
W
warranty, ii
D
D-sub pinouts
34937A, 7
34938A, 10
34939A, 13
J
jumper, 2
P
pinouts
34937A, 7
34938A, 10
34939A, 13
power-fail jumper, 2
programming examples, 4
T
temperature sensor, 2
Agilent 34937A-34939A General Purpose Switch Modules User’s Guide 17
Index
18 Agilent 34937A-34939A General Purpose Switch Modules User’s Guide
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