Agilent Technologies Switch 34937A User Manual

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  
 
Additional Safety Notices  
The following general safety precautions  
must be observed during all phases of oper-  
ation 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 com-  
ply with the requirements.  
Do Not Modify the Instrument  
Waste Electrical and Electronic  
Equipment (WEEE) Directive  
2002/96/EC  
Do not install substitute parts or perform  
any unauthorized modification to the prod-  
uct. 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 defec-  
tive should be made inoperative and  
secured against unintended operation until  
they can be repaired by qualified service  
personnel.  
General  
This product complies with the WEEE  
Directive (2002/96/EC) marking require-  
ment. The affixed product label (see above)  
indicates that you must not discard this  
electrical/electronic product in domestic  
household waste.  
Do not use this products in any manner not  
specified by the manufacturer. The protec-  
tive features of this product may be  
impaired if it is used in a manner not speci-  
fied in the operation instructions.  
Safety Symbols  
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.  
Alternating current  
Before Applying Power  
Verify that all safety precautions are taken.  
Make all connections to the unit before  
applying power.  
Frame or chassis  
terminal  
To return unwanted products, contact  
your local Agilent office, or go to  
for more information.  
Ground the Instrument  
Standby supply. Unit is  
not completely  
disconnected from ac  
mains when switch is off  
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 con-  
nected to an electrical ground (safety  
ground) at the power outlet. Any interrup-  
tion of the protective (grounding) conduc-  
tor or disconnection of the protective earth  
terminal will cause a potential shock haz-  
ard that could result in personal injury.  
Technical Support  
If you have questions about your shipment,  
or if you need information about warranty,  
service, or technical support, contact  
Agilent Technologies:  
Caution, risk of electric  
shock  
Caution, refer to  
accompanying description  
In the United States: (800) 829-4444  
In Europe: 31 20 547 2111  
In Japan: 0120-421-345  
Do Not Operate in an Explosive  
Atmosphere  
for information on contacting Agilent in  
your country of specific location. You can  
also contact your Agilent Technologies  
Representative.  
Do not operate the instrument in the pres-  
ence of flammable gases or fumes.  
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 exter-  
nal 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  
 
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  
General Purpose Switch Modules  
This User’s Guide covers the following two plug-in modules for the Agilent  
34980A Multifunction Switch/Measure Unit:  
34937A  
34938A  
34939A  
28-channel Form C and 4-channel Form A  
28-channel 5-amp Form A  
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.  
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.  
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.  
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.  
Temperature 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 oC threshold is reached. It  
is up to the user to determine what, if any, action should be taken.  
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).  
Before changing the position of the jumper, remove external  
connections from the module. Wait five to ten seconds to allow the  
WARNING  
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
1
2
3
Ope  
n
2
Maintain  
U205  
3
Power Down State  
U301  
C301  
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  
A temperature sensor on these modules triggers system interrupts  
NOTE  
when high-carry current-induced heat on the modules reaches a  
threshold of 70 oC. See description of the “HOT” annunciator on  
page 2.  
34937A Simplified Schematic  
NC  
NO  
Channel 001  
(1A Form C)  
NO  
Channel 029  
(5A Form A)  
COM  
COM  
NC  
NO  
Channel 028  
(1A Form C)  
NO  
Channel 032  
(5A Form A)  
COM  
COM  
6
Agilent 34937A-34939A General Purpose Switch Modules User’s Guide  
 
       
34937A 32-Channel GP Switch Module  
34937A D-Sub Connectors  
Bank 1  
Bank 2  
Bank 1  
For orientation, the D-sub connector end  
of the module is facing you.  
4NO 1NO  
NC  
17  
29NO 29C 7NO 3NO 12NO 8NO  
13NO 9NO 5NO 2NO 14NO 10NO 30NO 30C  
1
2
3
4
5
6
7
8
9
10  
11  
12  
13  
14  
15  
16  
Reserved 11C 7C 3C  
12C 8C  
4C  
24  
1C  
25  
13C 9C  
5C  
28  
2C  
29  
14C 10C 6C GND  
18  
21  
22  
27  
30  
31  
32  
19  
20  
23  
26  
33  
14NC 10NC 6NC 6NO  
GND 11NO 11NC 7NC 3NC 12NC 8NC 4NC 1NC 13NC 9NC 5NC 2NC  
41  
34  
38  
43  
44  
45  
47  
48  
49  
35  
39  
40  
42  
46  
36  
37  
50  
Channel  
Pin  
Channel  
Pin  
41  
Channel  
Pin  
Channel  
Pins Channel  
48 13 NC  
13 Common 26  
Pins Channel  
Pin  
1 NC  
42  
4 NC  
7 NC  
37  
10 NC  
43 30 NO  
15  
1 Common 25  
4 Common 24  
7 Common 20  
10 Common 31  
30 Common 16  
1 NO  
2 NC  
8
4 NO  
5 NC  
7
7 NO  
8 NC  
3
10 NO  
11 NC  
14  
36  
13 NO  
14 NC  
9
Reserved  
GND  
18  
33  
34  
46  
45  
40  
47  
2 Common 29  
5 Common 28  
8 Common 23  
11 Common 19  
14 Common 30  
GND  
2 NO  
3 NC  
12  
38  
5 NO  
6 NC  
11  
49  
8 NO  
9 NC  
6
11 NO  
12 NC  
35  
39  
14 NO  
29 NO  
13  
1
No Connect 17  
44  
3 Common 21  
6 Common 32  
6 NO 50  
9 Common 27  
9 NO 10  
12 Common 22  
29 Common 2  
3 NO  
4
12 NO  
5
Bank 2  
NC  
17  
31NO 31C 21NO  
26NO 22NO  
27NO 23NO  
16NO 28NO 24NO 32NO 32C  
17NO  
15NO  
8
19NO  
11  
18NO  
50-Pin D-Sub  
1
2
3
4
5
6
7
9
10  
12  
13  
14  
15  
16  
Male Connector  
Reserved 25C 21C 17C  
26C 22C 18C 15C 27C 23C 19C 16C 28C 24C 20C GND  
18  
21  
22  
24  
27  
28  
29  
30  
31  
32  
19  
20  
23  
25  
26  
33  
20NO  
50  
GND 25NO 25NC 21NC 17NC 26NC 22NC 18NC 15NC 27NC 23NC 19NC 16NC 28NC 24NC 20NC  
41  
34  
38  
43  
44  
45  
47  
48  
49  
35  
39  
40  
42  
46  
36  
37  
Channel  
Pin  
Channel  
Pin  
41  
Channel  
Pin  
Channel  
Pins Channel  
48 27 NC  
Pins Channel  
Pin  
15 NC  
42  
18 NC  
21 NC  
37  
24 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  
16 NC  
8
18 NO  
19 NC  
7
21 NO  
22 NC  
3
24 NO  
25 NC  
14  
36  
27 NO  
28 NC  
9
Reserved  
GND  
18  
33  
34  
46  
45  
40  
47  
16 Common 29  
19 Common 28  
22 Common 23  
25 Common 19  
28 Common 30  
GND  
16 NO  
17 NC  
12  
38  
19 NO  
20 NC  
11  
49  
22 NO  
23 NC  
6
25 NO  
26 NC  
35  
39  
28 NO  
31 NO  
13  
1
No Connect 17  
44  
17 Common 21  
17 NO  
20 Common 32  
20 NO 50  
23 Common 27  
23 NO 10  
26 Common 22  
26 NO  
31 Common 2  
4
5
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® Excel® or  
Adobe® Acrobat® format.  
Wire Size:  
20 AWG Typical  
18 AWG Max  
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  
A temperature sensor on these modules triggers system interrupts  
NOTE  
when high-carry current-induced heat on the modules reaches a  
threshold of 70 oC. See description of the “HOT” annunciator on  
page 2.  
34938A Simplified Schematic  
NO  
Channel 001  
(5A Form A)  
COM  
NO  
Channel 020  
(5A Form A)  
COM  
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  
Bank 2  
For orientation, the D-sub connector  
end of the module is facing you.  
Bank 1  
NC  
17  
6NO 6C 1NO 1C 7NO 7C  
3NO 3C 9NO 9C 4NO 4C 5NO 5C  
2NO 2C  
50-Pin D-Sub  
1
2
3
4
5
6
7
8
9
10  
11  
12  
13  
14  
15  
16  
Male Connector  
Reserved  
18  
1NO 1C 7NO 7C 2NO  
2C 3NO 3C 9NO 9C 4NO  
4C 5NO 5C GND  
21  
22  
24  
27  
28  
29  
30  
31  
32  
19  
20  
23  
25  
26  
33  
10NO 10C 10NO 10C  
9C 4NO 4C  
GND 6NO 6C 7NO 7C 8NO 8C 8NO 8C 9NO  
41  
34  
38  
43  
44  
45  
47  
48  
49  
35  
39  
40  
42  
46  
36  
37  
50  
Channel  
1NO  
Pin  
Channel  
Pin  
Channel  
Pin  
Channel  
Pins Channel  
37 9NO  
Pins  
3
3NO  
25  
5NO  
31  
7NO  
43  
1Common  
1NO  
4
3Common 26  
4NO 13  
4Common 14  
4NO 29  
4Common 30  
4NO 45  
4Common 46  
5NO 15  
5Common 16  
5Common 32  
7Common 38  
8NO 39  
8Common 40  
8NO 41  
8Common 42  
9NO 11  
9Common 12  
9NO 27  
9Common 28  
9Common 44  
10NO 47  
10Common 48  
10NO 49  
10Common 50  
19  
6NO  
1
1Common 20  
6Common  
6NO  
2
2NO  
7
35  
2Common  
2NO  
8
6Common 36  
23  
7NO  
5
Reserved  
GND  
18  
33  
34  
2Common 24  
3NO  
3Common 10  
7Common  
7NO  
6
9
21  
GND  
7Common 22  
No Connect 17  
Bank 2  
NC  
17  
16NO 16C 11NO 11C 17NO 17C  
13NO 13C 19NO 19C 14NO 14C 15NO 15C  
12NO 12C  
50-Pin D-Sub  
1
2
3
4
5
6
7
8
9
10  
11  
12  
13  
14  
15  
16  
Male Connector  
Reserved 11NO 11C 17NO 17C 12NO 12C 13NO 13C 19NO 19C 14NO 14C 15NO 15C GND  
18  
21  
22  
24  
27  
28  
29  
30  
31  
32  
19  
20  
23  
25  
26  
33  
20NO 20C 20NO 20C  
GND 16NO 16C 17NO 17C 18NO 18C 18NO 18C 19NO 19C 14NO 14C  
41  
34  
38  
43  
44  
45  
47  
48  
49  
35  
39  
40  
42  
46  
36  
37  
50  
Channel  
11NO  
Pin  
Channel  
Pin  
25  
Channel  
Pin  
Channel  
Pins Channel  
37 19NO  
Pins  
3
13NO  
15NO  
31  
17NO  
43  
11Common  
11NO  
4
13Common 26  
14NO 13  
14Common 14  
14NO 29  
14Common 30  
14NO 45  
14Common 46  
15NO 15  
15Common 16  
15Common 32  
17Common 38  
18NO 39  
18Common 40  
18NO 41  
18Common 42  
19NO 11  
19Common 12  
19NO 27  
19Common 28  
19Common 44  
20NO 47  
20Common 48  
20NO 49  
20Common 50  
19  
16NO  
1
11Common 20  
16Common  
16NO  
2
12NO  
7
35  
12Common  
12NO  
8
16Common 36  
23  
17NO  
5
Reserved  
GND  
18  
33  
34  
12Common 24  
13NO  
13Common 10  
17Common  
17NO  
6
9
21  
GND  
17Common 22  
No Connect 17  
10  
Agilent 34937A-34939A General Purpose Switch Modules User’s Guide  
 
     
34938A 20-Channel High-Current GP Switch Module  
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® Excel® or  
Adobe® Acrobat® format.  
Wire Size:  
20 AWG Typical  
18 AWG Max  
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  
A temperature sensor on these modules triggers system interrupts  
NOTE  
when high-carry current-induced heat on the modules reaches a  
threshold of 70 oC. See description of the “HOT” annunciator on  
page 2.  
34939A Simplified Schematic  
NO  
Channel 001  
(1A Form A)  
COM  
NO  
Channel 064  
(1A Form A)  
COM  
12  
Agilent 34937A-34939A General Purpose Switch Modules User’s Guide  
 
       
34939A 64-Channel High-Density Form-A GP Switch Module  
34939A D-Sub Connectors  
Bank 1  
Bank 2  
Bank 1  
For orientation, the D-sub connector  
end of the module is facing you.  
4C 4NO 7C 7NO 10C 10NO 13C 13NO 16C 16NO 18C 18NO 21C 21NO 24C 24NO 27C 27NO 30C 30NO  
20  
1
2
3
4
5
6
7
8
9
10  
11  
12  
13  
14  
15  
16  
17  
18  
19  
78-Pin D-Sub  
Male Connector  
3C 3NO 6C 6NO 9C 9NO 12C 12NO 15C 15NO 19C 19NO 22C 22NO 25C 25NO 28C 28NO NC  
26  
38  
21  
24  
25  
27  
30  
31  
37  
32  
33  
34  
35  
39  
22  
23  
28  
29  
36  
NC 5C 5NO 8C 8NO 11C 11NO 14C 14NO 17C 17NO 20C 20NO 23C 23NO 26C 26NO 29C 29NO NC  
40  
41  
44  
45  
46  
48  
49  
50  
51  
52  
53  
54  
55  
57  
58  
59  
42  
43  
47  
56  
NC 1C 1NO 2C 2NO NC NC NC GND  
32C 32NO  
31C 31NO  
Res. NC NC NC NC NC  
60  
63  
64  
66  
69  
70  
71  
72  
73  
74  
77  
78  
61  
62  
65  
67  
68  
75  
76  
Channel  
Pin  
62  
Description Pin  
8 NO 44  
8 Common 43  
9 NO 26  
9 Common 25  
10 NO  
10 Common 5  
Description Pin  
15 NO 30  
15 Common 29  
16 NO 10  
16 Common 9  
Description Pin  
22 NO 34  
22 Common 33  
23 NO 54  
23 Common 53  
24 NO 16  
24 Common 15  
25 NO 36  
25 Common 35  
26 NO 56  
26 Common 55  
27 NO 18  
27 Common 17  
28 NO 38  
28 Common 37  
Description Pin  
29 NO 58  
29 Common 57  
30 NO 20  
30 Common 19  
31 NO 78  
31 Common 77  
32 NO 76  
Description Pin  
1 NO  
No Connect 67  
No Connect 70  
No Connect 71  
No Connect 72  
No Connect 73  
No Connect 74  
Chassis GND 68  
1 Common 61  
2 NO 64  
2 Common 63  
3 NO 22  
3 Common 21  
6
17 NO  
50  
17 Common 49  
4 NO  
2
11 NO  
46  
18 NO  
18 Common 11  
19 NO 32  
19 Common 31  
20 NO 52  
20 Common 51  
21 NO 14  
21 Common 13  
12  
4 Common  
5 NO  
1
11 Common 45  
32 Common 75  
No Connect 39  
No Connect 40  
No Connect 59  
No Connect 60  
No Connect 65  
No Connect 66  
Reserved  
69  
42  
12 NO  
12 Common 27  
13 NO  
13 Common 7  
28  
5 Common 41  
6 NO 24  
6 Common 23  
8
7 NO  
4
3
14 NO  
48  
7 Common  
14 Common 47  
Agilent 34937A-34939A General Purpose Switch Modules User’s Guide  
13  
 
   
34939A 64-Channel High-Density Form-A GP Switch Module  
Bank 2  
Bank 1  
Bank 2  
For orientation, the D-sub connector  
end of the module is facing you.  
58C 58NO 61C 61NO 52C 52NO 55C 55NO 46C 46NO 48C 48NO 39C 39NO 42C 42NO 33C 33NO 36C 36NO  
20  
1
2
3
4
5
6
7
8
9
10  
11  
12  
13  
14  
15  
16  
17  
18  
19  
78-Pin D-Sub  
57C 57NO 60C 60NO 51C 51NO 54C 54NO 45C 45NO 49C 49NO 40C 40NO 43C 43NO 34C 34NO NC  
Male Connector  
38  
26  
21  
24  
25  
27  
30  
31  
37  
32  
33  
34  
35  
39  
22  
23  
28  
29  
36  
NC 59C 59NO 62C 62NO 53C 53NO 56C 56NO 47C 47NO 50C 50NO 41C 41NO 44C 44NO 35C 35NO NC  
40  
44  
49  
50  
51  
53  
54  
55  
57  
58  
59  
41  
45  
46  
48  
52  
42  
43  
47  
56  
NC 63C 63NO 64C 64NO NC NC NC GND Res. NC  
38C 38NO  
37C 37NO  
NC NC NC NC  
60  
63  
64  
66  
69  
70  
71  
72  
73  
74  
77  
78  
61  
62  
65  
67  
68  
75  
76  
Channel  
Pin  
18  
Description Pin  
40 NO 34  
40 Common 33  
41 NO 54  
41 Common 53  
42 NO 16  
42 Common 15  
43 NO 36  
43 Common 35  
44 NO 56  
44 Common 55  
45 NO 30  
45 Common 29  
46 NO 10  
46 Common 9  
Description Pin  
47 NO 50  
47 Common 49  
48 NO 12  
48 Common 11  
49 NO 32  
49 Common 31  
50 NO 52  
50 Common 51  
51 NO 26  
51 Common 25  
52 NO  
52 Common 5  
Description Pin  
54 NO 28  
54 Common 27  
55 NO  
55 Common 7  
Description Pin  
61 NO  
61 Common 3  
Description Pin  
33 NO  
4
No Connect 67  
No Connect 70  
No Connect 71  
No Connect 72  
No Connect 73  
No Connect 74  
Chassis GND 68  
33 Common 17  
34 NO 38  
34 Common 37  
35 NO 58  
35 Common 57  
36 NO 20  
36 Common 19  
37 NO 78  
37 Common 77  
38 NO 76  
38 Common 75  
39 NO 14  
39 Common 13  
8
62 NO  
44  
62 Common 43  
56 NO  
48  
63 NO  
63 Common 61  
64 NO 64  
62  
56 Common 47  
57 NO  
57 Common 21  
58 NO  
58 Common 1  
22  
64 Common 63  
No Connect 39  
No Connect 40  
No Connect 59  
No Connect 60  
No Connect 65  
No Connect 66  
Reserved  
69  
2
6
59 NO  
42  
59 Common 41  
53 NO  
46  
60 NO  
24  
53 Common 45  
60 Common 23  
14  
Agilent 34937A-34939A General Purpose Switch Modules User’s Guide  
 
34939A 64-Channel High-Density Form-A GP Switch Module  
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® Excel® or  
Adobe® Acrobat® format.  
33  
34  
35  
36  
37  
38  
1
2
3
4
5
6
C NO C NO C NO C NO C NO C NO  
C NO  
C NO  
C NO C NO C NO C NO  
C NO C NO C NO C NO C NO C NO  
C NO C NO C NO C NO C NO C NO  
39  
40  
41  
42  
43  
44  
7
8
9
10  
11  
12  
45  
46  
47  
48  
49  
50  
Wire Size:  
20 AWG Typical  
18 AWG Max  
13  
C NO  
14  
C NO  
15  
16  
17  
18  
C NO C NO C NO C NO C NO C NO  
C NO C NO C NO C NO  
C NO C NO C NO C NO C NO C NO  
C NO C NO C NO C NO C NO C NO  
52  
51  
57  
53  
59  
54  
55  
56  
19  
20  
21  
22  
23  
24  
58  
60  
61  
62  
26  
25  
27  
28  
29  
30  
C NO C NO C NO C NO C NO C NO  
C NO C NO  
C NO  
C NO  
32  
C NO  
C NO  
31  
C NO C NO C NO C NO  
63  
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  
W
34929A  
warranty, ii  
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  
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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