Tektronix Series 3700A Switch,Control Cards Reference manual

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www.tek.com/keithley

Series 3700A Switch and Control Cards

Reference Manual

3700AS-909-01 Rev. C / July 2016

*P3700AS-909-01C*

3700AS-909-01

A Greater Measure of Condence

A Tektr onix Company

Series 3700A

Switch and Control Cards

Reference Man ual

Cleveland, Ohio, U.S.A.

Any unauthorized reproduction, photocopy, or use of the information herein, in whole or in part,

without the prior written approval of Keithley Instruments is strictly prohibited.

All Keithley Instruments product names are trademarks or registered trademarks of Keithley Instruments. Other brand names are trademarks or registered trademarks of their respective

holders.

Document number: 3700AS-909-01 Rev. C / July 2016

Safety precaut ions

The following safety precautions should be observed before using this product and any associated instrumentation. Although some instruments and accessories would norma lly be used with nonhazardous voltages, there are situations where hazardous conditions may be present.

This product is intended for use by qualified personnel who recognize shock hazards and are familiar with the safety precautions required to avoid possible injury. Read and follow all installation, operation, and maintenance information carefully before using the product. Refer to the user documentation for complete product specifications.

If the product is used in a manner not specified, the protection provided by the product warranty may be impaired. The types of product users are:

Responsible body is the individual or group responsible for the use and maintenance of equipment, for ensuring that the equipment is operated within its specifications and operating limits, and for ensuring that operators are adequately trained.

Operators use the product for its intended function. They must be trained in electrical safety procedures and proper use of the instrument. They must be protected from electric shock and contact with hazardous live circuits.

Maintenance personnel perform routine procedures on the product to keep it operating properly, for example, setting the line voltage or replacing consumable materials. Maintenance procedures are described in the user documentation. The procedures explicitly state if the operator may perform them. Otherwise, they should be performed only by service personnel.

Service personnel are trained to work on live circuits, perform safe installations, and repair products. Only properly trained service personnel may perform installation and service procedures.

Keithley Instruments products are designed for use with electrical signals that are measurement, control, and data I/O connections, with low transient overvoltages, and must not be directly connected to mains voltage or to voltage sources with high transient overvoltages. Measurement Category II (as referenced in IEC 60664) connections require protection for high transient overvoltages often associated with local AC mains connections. Certain Keithley measuring instruments may be connected to mains. These instruments will be marked as category II or higher.

Unless explicitly allowed in the specifications, operating manual, and instrument labels, do not connect any instrument to mains. Exercise extreme caution when a shock hazard is present. Lethal voltage may be present on cable connector jacks or test

fixtures. The American National Standards Institute (ANSI) states that a shock hazard exists when voltage levels greater than 30 V RMS, 42.4 V peak, or 60 VDC are present. A good safety practice is to expect that hazardous voltage is present in any unknown circuit before measuring.

Operators of this product must be protected from electric shock at all times. The responsible body must ensure that operators are prevented access and/or insulated from every connection point. In some cases, connections must be exposed to potential human contact. Product operators in these circumstances must be trained to protect themselves from the risk of electric shock. If the circuit is capable of operating at or above 1000 V, no conductive part of the circuit may be exposed.

Do not connect switching cards directly to unlimited power circuits. They are intended to be used with impedance-limited sources. NEVER connect switching cards directly to AC mains. When connecting sources to switching cards, install protective devices to limit fault current and voltage to the card.

Before operating an instrument, ensure that the line cord is connected to a properly-grounded power receptacle. Inspect the connecting cables, test leads, and jumpers for possible wear, cracks, or breaks before each use.

When installing equipment where access to the main power cord is restricted, such as rack mounting, a separate main input power disconnect device must be provided in close proximity to the equipment and within easy reach of the operator.

For maximum safety, do not touch the product, test cables, or any other instruments while power is applied to the circuit under test. ALWAYS remove power from the entire test system and discharge any capacitors before: connecting or disconnecting cables or jumpers, installing or removing switching cards, or making internal changes, such as installing or removing jumpers.

Do not touch any object that could provide a current path to the common side of the circuit under test or power line (earth) ground. Always make measurements with dry hands while standing on a dry, insulated surface capable of withstanding the voltage being measured.

For safety, instruments and accessories must be used in accordance with the operating instructions. If the instruments or accessories are used in a manner not specified in the operating instructions, the protection provided by the equipment may be impaired.

Do not exceed the maximum signal levels of the instruments and accessories. Maximum signal levels are defined in the specifications and operating information and shown on the instrument panels, test fixture panels, and switching cards.

When fuses are used in a product, replace with the same type and rating for continued protection against fire hazard. Chassis connections must only be used as shield connections for measuring circuits, NOT as protective earth (safety ground)

connections. If you are using a test fixture, keep the lid closed while power is applied to the device under test. Safe operation requires the use

of a lid interlock.

screw is present, connect it to protective earth (safety ground) using the wire recommended in the user documentation.

If a

The symbol on an instrument means caution, risk of danger. The user must refer to the operating instructions located in the user documentation in all cases where the symbol is mark ed on the instru ment .

The

symbol on an instrument means caution, risk of electr ic shock. Use standard safety precautions to avoid personal

contact with these voltages.

The

symbol on an instrument shows that the surface may be hot. Avoid personal contact to prevent burns.

symbol indicates a connection terminal to the equipment frame.

If this symbol is on a product, it indicates that mercury is present in the display lamp. Please note that the lamp must be properly disposed of according to federal, state, and local laws.

The WARNING heading in the user documentation explains dangers that might result in personal injury or death. Always read the associated information very carefully before performing the indicated procedure.

The CAUTION heading in the user documentation explains h az ards that coul d dama ge the instr ume nt. Such dam age may invalidate the warranty.

Instrumentation and accessories shall not be connected to humans. Before performing any maintenance, disconnect the line cord and all test cables. To maintain protection from electric shock and fire, replacement components in mains circu its — inc lud ing the power

transformer, test leads, and input jacks — must be purchased from Keithley Instruments. Standard fuses with applicable national safety approvals may be used if the rating and type are the same. The detachable mains power cord provided with the instrument may only be replaced with a similarly rated power cord. Other components that are not safety-related may be purchased from other suppliers as long as they are equivalent to the original component (note that selected parts should be purchased only through Keithley Instruments to maintain accuracy and functionality of the product). If you are unsure about the applicability of a replacement component, call a Keithley Instruments office for information.

Unless otherwise noted in product-specific literature, Keithley instruments are designed to operate indoors only, in the following environment: Altitude at or below 2,000 m (6,562 ft); temperature 0 °C to 50 °C (32 °F to 122 °F) ; and pollution degree 1 or 2.

To clean an instrument, use a damp cloth or mild, water-based cleaner. Clean the exterior of the instrument only. Do not apply cleaner directly to the instrument or allow liquids to enter or spill on the instrument. Products that consist of a circuit board with no case or chassis (e.g., a data acquisition board for installation into a computer) should never require cleaning if handled according to instructions. If the board becomes contaminated and operation is affected, the board should be returned to the factory for proper cleanin g/s er v icing.

Safety precaution revision as of March 2016.

Introduction ............................................................................................................... 1-1

Contact information .............................................................................................................. 1-1

Safety precautions for connections ...................................................................................... 1-1

Series 3700A documentation ............................................................................................... 1-2

Series 3700A cards general operation .................................................................... 2-1

Available cards ..................................................................................................................... 2-1

Card installation ................................................................................................................... 2-2

Verifying card installation .......................................................................................................... 2-3

Connection safety ................................................................................................................ 2-3

Pseudocards ........................................................................................................................ 2-4

Installed pseudocards ............................................................................................................... 2-4

Series 3700A cards power usage ............................................................................ 3-1

Maximum power usage with Series 3700A cards ................................................................ 3-1

Power budgeting and calculation .............................................................................................. 3-2

Power budgeting examples ....................................................................................................... 3-3

Hardware interlocks ............................................................................................................. 3-7

Engaging hardware interlocks ................................................................................................... 3-8

Interlock status .......................................................................................................................... 3-8

Interlock pin numbers ................................................................................................................ 3-9

Model 3720 multiplexer card .................................................................................... 4-1

Model 3720 dual 1 × 30 multiplexer card ............................................................................. 4-1

Introduction to the Model 3720 dual 1 × 30 multiplexer card ..................................................... 4-1

Available accessories: Model 3720 ........................................................................................... 4-2

Connection information: Model 3720 ......................................................................................... 4-2

Schematics: Model 3720 ........................................................................................................... 4-3

Model 3721 multiplexer card .................................................................................... 5-1

Model dual 1 × 20 multiplexer card ...................................................................................... 5-1

Introduction to the Model 3721 dual 1 × 20 multiplexer card ..................................................... 5-1

Available accessories: Model 3721 ........................................................................................... 5-2

Model 3721-ST accessory board channel list............................................................................ 5-2

Connection information: Model 3721 ......................................................................................... 5-3

Schematics: Model 3721 ........................................................................................................... 5-4

Amps channel fuse replacement procedure .............................................................................. 5-6

Model 3721: AMPS channels fuse replacement........................................................................ 5-8

Model 3722 high-density multiplexer card .............................................................. 6-1

Model 3722 dual 1 × 48 high-density multiplexer card ........................................................ 6-1

Introduction to the Model 3722 card .......................................................................................... 6-1

Available accessories: Model 3722 ........................................................................................... 6-2

Connection information: Model 3722 ......................................................................................... 6-2

Table of Contents

Reference Manual

Series 3700A Switch and Control Cards

Schematics: Model 3722 ........................................................................................................... 6-3

Model 3723 high-speed reed relay multiplexer card ............................................... 7-1

Model 3723 dual 1 × 30 high-speed multiplexer card .......................................................... 7-1

Introduction to the Model 3723 card .......................................................................................... 7-1

Available accessories: Model 3723 ........................................................................................... 7-2

Connection information: Model 3723 ......................................................................................... 7-2

Schematics: Model 3723 ........................................................................................................... 7-4

Model 3724 FET multiplexer card ............................................................................ 8-1

Model 3724 dual 1 × 30 FET multiplexer card ..................................................................... 8-1

Introduction to the Model 3724 card .......................................................................................... 8-1

Available accessories: Model 3724 ........................................................................................... 8-2

Connection information: Model 3724 ......................................................................................... 8-2

Schematics: Model 3724 ........................................................................................................... 8-3

Model 3730 high-density matrix card ...................................................................... 9-1

Model 3730 6 × 16 high-density matrix card ........................................................................ 9-1

Introduction to the Model 3730 card .......................................................................................... 9-1

Available accessories: Model 3730 ........................................................................................... 9-2

Connection information: Model 3730 ......................................................................................... 9-2

Schematics: Model 3730 ........................................................................................................... 9-3

Model 3731 high-speed reed relay matrix card ..................................................... 10-1

Model 3731 6 × 16 high-speed reed matrix card ............................................................... 10-1

Introduction to the Model 3731 card ........................................................................................ 10-1

Available accessories: Model 3731 ......................................................................................... 10-2

Connection information: Model 3731 ....................................................................................... 10-2

Schematics: Model 3731 ......................................................................................................... 10-3

Model 3732 quad 4 × 28 reed relay matrix card .................................................... 11-1

Introduction ........................................................................................................................ 11-1

Additional features .................................................................................................................. 11-2

Accessories for Model 3732 ............................................................................................... 11-2

Maximum power usage with Model 3732 cards ................................................................. 11-2

Measurement considerations ............................................................................................. 11-2

Channel specifiers .............................................................................................................. 11-3

Channel types .................................................................................................................... 11-3

Channel and backplane notation ....................................................................................... 11-3

Configuration and connection choice s overv iew ..................................................................... 11-6

Screw terminal assemblies...................................................................................................... 11-7

Direct wiring .......................................................................................................................... 11-10

Hardware interlocks .............................................................................................................. 11-10

Channel specifiers ................................................................................................................. 11-11

Card configurations .......................................................................................................... 11-13

Single-pole configurations ..................................................................................................... 11-13

Model 3732 2-pole operation ........................................................................................... 11-34

Series 3700A

Switch and Control Cards Reference Manual Table

of Contents

Two-pole configurations ........................................................................................................ 11-34

Cross-card expansion ...................................................................................................... 11-47

Cross-card expansion examples ........................................................................................... 11-47

Using the Model 3732 with a digital multimet er ............................................................... 11-48

External wiring connection method ....................................................................................... 11-48

Programmatic connection met hod ......................................................................................... 11-48

Alternative jumper connection method .................................................................................. 11-48

Using the Series 3700A front panel with the Model 3732 card ........................................ 11-49

Pseudocard support for the Model 3732 .......................................................................... 11-49

Using remote commands from a remote interface ........................................................... 11-50

New remote commands ........................................................................................................ 11-50

Model 3740 general purpose card ......................................................................... 12-1

Model 3740 32-channel isolated switch card ..................................................................... 12-1

Introduction to the Model 3740 card ........................................................................................ 12-1

Available accessories: Model 3740 ......................................................................................... 12-2

Connection information: Model 3740 ....................................................................................... 12-2

Schematics: Model 3740 ......................................................................................................... 12-3

Model 3750 multifunction control card .................................................................. 13-1

Model 3750 multifunction I/O card ..................................................................................... 13-1

Introduction to the Model 3750 Card ....................................................................................... 13-1

Available accessories: Model 3750 ......................................................................................... 13-2

Connection information: Model 3750 ....................................................................................... 13-2

Schematics: Model 3750 ......................................................................................................... 13-3

Model 3750 additional information ..................................................................................... 13-4

Digital I/O ................................................................................................................................ 13-4

Counter/totalizer ...................................................................................................................... 13-8

Analog output ........................................................................................................................ 13-10

Using match counts ............................................................................................................... 13-18

Latching values ..................................................................................................................... 13-19

Power consumption implicatio ns ........................................................................................... 13-20

Series 3700 cards connection logs ......................................................................... A-1

Series 3700 cards connection logs ...................................................................................... A-2

Model 3720 connection log ....................................................................................................... A-2

Model 3721 connection log ....................................................................................................... A-4

Model 3722 connection log ....................................................................................................... A-6

Model 3723 connection logs...................................................................................................... A-9

Model 3724 connection log ..................................................................................................... A-15

Model 3730 connection log ..................................................................................................... A-18

Model 3732 connection logs.................................................................................................... A-19

Model 3740 connection log ..................................................................................................... A-46

Model 3750 connection log ..................................................................................................... A-48

Index .................................................................................................................... Index-1

Series 3700A documentation ................................................... 1-2

In this section:

Contact information .................................................................. 1-1

Safety precautions for connections .......................................... 1-1

Contact information

If you have any questions after you review the information in this documentation, please contact your local Keithley Instruments office, sales partner, or distributor. You can also call the corporate headquarters of Keithley Instruments (toll-free inside the U.S. and Canada only) at 1-800-935-5595, or from outside the U.S. at +1-440-248-0400. For worldwide contact numbers, visit the

Instruments website (http://www.tek.com/keithley).

Section 1

Introduction

Keithley

Safety precautions for conn ect i ons

Connection information for switching cards is intended for qualified service personnel. Do not attempt to connect DUT or external circuitry to a switching card unless qualified to do so.

To prevent electric shock that could result in serious injury or death, comply with these safety precautions:

Before making or breaking any connections to the switching card, make sure the Series 3700A is turned off and power is removed from all external circuitry.

Do not connect signals that will exceed the maximum specifications of any installed switching card.

If both the rear analog backplane connector of the Series 3700A and the switching card terminals are connected at the same time, the test lead insulation must be rated to the highest voltage that is connected. For example, if 300V is connected to the analog backplane connector, the test lead insulation for the switching card must also be rated for 300V.

Section

Reference Manual

3700AS-903-01

Series 3700A System Switch/Multimeter

Hardware and software requirements, 3700AS-900-01

Series 3700A System Switch/Multimeter

Information about scanning, reading,

3700AS-901-01

Series 3700A System Switch/Multimeter Reference Manual

Information about controlling the Series 3700A from a remote interface

PA-949

Series 3700A Cables and Connector

Information about the different cables and

PA-955

Series 3700A Screw Terminal

Contains handling and installation

PA-1021

Model 3732 Quad 4 × 28 Reed Relay

Contains card-specific safety precautions,

1: Introduction Series 3700A Switch and Control Cards

Dangerous arcs of an explosive nature in a high-energy circuit can cause severe personal injury or death if contacted. If the multimeter is connected to a high-energy circuit when set to a current range, low resistance range, or any other low-impedance range, the circuit is virtually shorted. Dangerous arcing can result (even when the multimeter is set to a voltage range) if the minimum voltage spacing is reduced in the external connections. For details about how to safely make high energy measurements, see High-energy circuit safety precautions in the

Series 3700A Reference Manual

Electrotechnical Commission (IEC) Standard IEC 664, the Series 3700A is Installation Category I and must not be connected to mains.

Series 3700A documentation

Complete documentation for the Series 3700A System Switch/Multimeter instruments is available for download from the Keithley Downloads web page list of available documentation for the Series 3700A.

Document number

Document name Content description

. As described in the International

(http://www.tek.com/downloads). The following is a

Quick Start Guide

User's Manual

Kits Installation Instructions

Assemblies Installation Instructions

Matrix Card Connection Information

switching card installation instructions, and a brief description of front-panel and remote interface operation

writing, and controlling channels

connector kits that are used on the Series 3700A cards.

instructions for Series 3700A screw terminal assemblies

list of features and accessories, connection information, and measurement considerations

1-2 3700AS-909-01 Rev. C / July 2016

Pseudocards ............................................................................ 2-4

Model 3720 dual 1 × 30 multiplexer card (on page 4-1)

Offers two independent banks of 1 × 30 two-pole including temperature measurements.

Model 3721 dual 1 × 20 multiplexer card (on page 5-1)

Offers two independent banks of 1 × 20 two-pole including temperature measurements.

Model 3722 dual 1 × 48 high density multiplexer card (on page 6-

Offers two independent banks of 1 × 48 two-pole high channel count.

Model 3723 dual 1 × 30 high speed reed relay multiplexer card (on

Offers two independent banks of high speed 1 × 30 scanning applications.

Model 3724 dual 1 × 30 FET multiplexer card (on page 8-1)

Provides two independent banks of solid-state

measurement applications, including temperature.

Two-pole, 6 × 16 column matrix card; can connect combination of 16 DUTs.

Model 3732 quad 4 × 28 ultra-high density reed relay matrix card

Ultra-high density matrix card; comprised of four

applications.

Model 3740 general purpose card (on page 12-1)

Offers 28 general-purpose form C channels; ideal for routing power or other control devices.

Model 3750 multifunction control card (on page 13-1)

Offers control and monitoring of your automated

variety of system control applications.

In this section:

Available cards ......................................................................... 2-1

Card installation ....................................................................... 2-2

Connection safety .................................................................... 2-3

Available cards

The next table shows a list of available cards for the Series 3700A System Switch/Multimeter.

Name Description

Section 2

Series 3700A cards general operation

page 7-1)

Model 3730 6 × 16 high density matrix card (on page 9-1)

Model 3731 6 × 16 high speed reed relay matrix card (on page 10-

(on page 11-1)

multiplexers; ideal for general purpose switching,

multiplexers; ideal for applications that require a

two-pole multiplexers; i deal for high speed

relays arranged as 1 × 30 two-pole multiplexers; ideal for high reliability, high speed multipoint

up to six differential instrument channels to any

Two-pole, 6 × 16 column reed relay matrix card; using high speed reed relays with actuation times of 0.5ms, this card meets the requirements of demanding throughput applications while offering the additional benefit of long life, exceeding one billion operations.

banks, each with 4 × 28 columns or reed relays; provides 448 single-pole crosspoints for maximum connection versatility in high channel count

test system; 40 digital I/O bits, four counters, and two analog outputs make it well-suited for a wide

Section

Reference Manual

2: Series 3700A cards general operation Series 3700A Switch and Control Cards

Card installation

Slot covers must be installed on unused slots to prevent personal contact with high voltage circuits.

Perform the following steps to install a switching card into the instrument mainframe:

1. Turn the instrument off and disconnect the power line cord and any other cables connected to the rear panel.

2. Position the instrument so that you are facing the rear panel.

3. Remove the slot cover plate from the desired mainframe slot. Retain the plate and screws for future use.

4. With the top cover of the switching card facing up, align the card's edge into the slot's card guide and slide in the card. For the last ¼ inch or so, press in firmly to mate the card connector to the mainframe connector.

5. On each side of the card, there is a mounting screw. Tighten these two screws to secure the card to the mainframe. Do not overtighten.

6. Reconnect the power line cable and any other cables to the rear panel.

7. Press the SLOT key to see the model numbers, description, and the firmware revision of the installed switching cards, along with the mainframe firmware and DMM (if present).

Figure 1: Typical module installation

2-2 3700AS-909-01 Rev. C / July 2016

Series 3700A

Series 3700A cards general operation

Card edge (part of card)

Mounting screw (part of card)

Switch and Control Cards Reference Manual Section 2:

Item Description

1 Card guide (part of Series 3700A) 2 Card

Verifying card installation

To verify that the card was properly installed:

1. If the instrument is controlled remotely (REM is displayed), press EXIT to switch control to local.

2. Press SLOT. The name and firmware version of the instrument is displayed.

3. Press SLOT again. The name and firmware version of the card in slot 1 is displayed.

4. If you have more than one card installed, continue to press SLOT until the slot you just installed is displayed.

5. Confirm the name and firmware version.

6. Press EXIT to return to the operating display.

Connection safety

Connection information for switching cards is intended for qualified service personnel. Do not attempt to connect DUT or external circuitry to a switching card unless qualified to do so.

To prevent electric shock that could result in serious injury or death, comply with these safety precautions:

Before making or breaking any connections to the switching card, make sure the instrument is turned off and power is removed from all external circuitry.

Do not connect signals that will exceed the maximum specifications of any installed switching card.

If both the rear analog backplane connector of the instrument and the switching card terminals are connected at the same time, the test lead insulation must be rated to the highest voltage that is connected. For example, if 300V is connected to the analog backplane connector, the test lead insulation for the switching card must also be rated for 300V.

Dangerous arcs of an explosive nature in a high-energy circuit can cause severe personal injury or death. If the multimeter is connected to a high-energy circuit when set to a current range, low resistance range, or any other low impedance range, the circuit is virtually shorted.

Dangerous arcing can result (even when the multimeter is set to a voltage range) if the minimum voltage spacing is reduced in the external connections. For details about how to safely make high-energy measurements, see High-energy circuit safety precautions.

As described in the International Electrotechnical Commission (IEC) Standard IEC 664, the instrument is Installation Category I and must not be connected to mains.

3700AS-909-01 Rev. C / July 2016 2-3

Section

Reference Manual

2: Series 3700A cards general operation Series 3700A Switch and Control Cards

Pseudocards

You can perform open, close, and scan operations and configure your system without having an actual switching card installed in your instrument. Using the remote interface, you can assign a pseudocard to an empty switching card slot, allowing the instrument to operate as if a switching card were installed.

A pseudocard cannot be configured from the front panel. However, once the remote configuration is complete, you can take the instrument out of remote mode and use the front panel. Press the EXIT key to take the instrument out of remote mode.

A saved setup or created configuration script retains the model number of the card installed in each slot. The model number of a pseudocard is the same as the model number of an actual card (except for Model 3732 cards; see the "Pseudocard support for the Model 3732" topic in the Series 3700 Switch and Control Cards Reference Manual for details). This allows a saved setup or created configuration script to be recalled if the installed card (or pseudocard) matches the model number for the slot in the saved setup or created configuration script.

When the instrument is turned off, the pseudocard is no longer assigned to the slot.

Installed pseudocards

A pseudocard can be "installed" in any empty slot. With the 3720 pseudocard "installed," the instrument operates as if a Model 3720 Thermocouple MUX card is installed in the slot. This allows you to configure a scan and exercise its operation before the switching module is installed in the Series 3700A. Use the following commands to install Series 3700A pseudocards in empty slots:

For no pseudocard selection (use to remove an existing pseudocard):

slot.PSEUDO_NONE or 0

Model 3720 for Dual 1 × 30 multiplexer card simulation:

slot.PSEUDO_3720 or 3720

Model 3721 for Dual 1 × 20 multiplexer card simulation:

slot.PSEUDO_3721 or 3721

Model 3722 for Dual 1 × 48 multiplexer card simulation:

slot.PSEUDO_3722 or 3722

Model 3723 Dual 1 × 30 reed multiplexer card simulation :

slot.PSEUDO_3723 or 3723

Model 3724 Dual 1 × 30 FET multiplexer card simulation:

slot.PSEUDO_3724 or 3724

Model 3730 6 × 16 high-density matrix card simulation:

slot.PSEUDO_3730 or 3730

Model 3740 32-channel isolated switch card:

2-4 3700AS-909-01 Rev. C / July 2016

slot.PSEUDO_3740 or 3740

Series 3700A

ards general operation

Switch and Control Cards Reference Manual Section 2: Series 3700A c

Model 3750 multifunction I/O card simulation:

slot.PSEUDO_3750 or 3750

For example, to set the attribute to "install" the Model 3720 pseudocard in slot 6:

slot[6].pseudocard = slot.PSEUDO_3720

When queried, the return value has "Pseudo" before the card description. For example:

print(slot[3].idn) → 3720,Pseudo Dual 1x30 Multiplexer,00.00a

The revision level of a pseudocard is always returned as 00.00 a. Query the slot[X] attributes to determine the capabilities of the installed switching modules. For

example, send the following query to determine if slot 1 supports common-side 4-wire Ω channels:

CommonSideOhms1 = slot[1].commonsideohms

3700AS-909-01 Rev. C / July 2016 2-5

Hardware interlocks ................................................................. 3-7

Slot 1

Slot 4

Slot 2

Slot 5

Slot 3

Slot 6

12300 mW (max)

Series 3700A cards power usage

In this section:

Maximum power usage with Series 3700A cards ..................... 3-1

Maximum power usage with Series 3700A cards

The Series 3700A series offers a growing family of high-density and general-purpose plug-in cards that accommodates a broad range of signals at very competitive pricing. The Series 3700A supports applications as diverse as design validation, accelerated stress testing, data acquisition, and functional testing.

Plug-in cards are capable of switching many relays at once, which can take a substantial amount of system power. There is a limited amount of system power available for switching relays. Therefore, use care in order that Series 3700A maximum available power is not exceeded. The maximum power available is limited on a per-bank basis as follows:

Section 3

Bank 1 Bank 2

Based on the previous table, the total power available for slots 1, 2, and 3 is 12,300 mW (12.3 W). Similarly, the total power available for slots 4, 5, and 6 is 12.3 W. Attempting to exceed these power levels results in the system performing as many of the operations as possible until these power limits are reached. An error message is then created and the remaining operations are not performed.

There is also a maximum slot power limit of 10,500 mW. However, the maximum is rarely a consideration.

Section

Reference Manual

consumption (milliwatts)

3720

975

100

3722

475

100

3723

700

100 (2-Pole)

100

50 (1-Pole)

100

3724

1150

100

3730

780

100

3731

780

100

3732

780

100

3740

1000

NA (independent)

100

totalizers (730 for all 4; cannot

Example 7 (on page 3-7).

3: Series 3700A cards power usage Series 3700A Switch and Control Cards

Power budgeting and calculation

Individual relay power consumption generally depends on the type of relay. Latching-type relays consume power only briefly in order to open or close. These types of relays are not of concern for power budgeting purposes. Nonlatching types of relays continuously consume power in order to maintain their state. These types of relays must be considered for power budgeting purposes.

Another power consideration is the fact that each plug-in card uses system power in order to operate. This continuous power draw is known as quiescent power. Quiescent power directly takes away from the power that is available to operate relays. So it must also be taken into account when budgeting for power consumption.

The following table shows the power consumption of channel and backplane relays for various Series 3700A plug-in cards. The quiescent power is also shown. For latching-type relays NA is used.

Model Quiescent power

(milliwatts)

3721 1350 NA 100

Channel relay power consumption (milliwatts) each

Backplane relay power each

200 (high current) 100 3750 3300

NOTE: The 3300 is reduced when power is disabled to each analog output channel

0 each (digital input channel) 365 each (digital output channel) 470 each (analog output) 0 each (totalizers)

(820 each) or disabled to the be individually disabled)

See Example 5 (on page 3-6),

Example 6 (on page 3-7), and

3-2 3700AS-909-01 Rev. C / July 2016

Series 3700A

Series 3700A cards power usage

Slot 1

3723

Slot 2

3723

Slot 3

3723

Slot 4

3723

Slot 5

3723

Slot 6

3723

Slot 1 power consumed =

700 + 30 × 100

4 × 100

4100

Slot 2 power consumed =

700 + 30 × 100

4 × 100

4100

Slot 3 power consumed =

700 + 30 × 100

4 × 100

4100

Slot 4 power consumed =

700 + 30 × 100

4 × 100

4100

Slot 5 power consumed =

700 + 30 × 100

4 × 100

4100

Slot 6 power consumed =

700 + 30 × 100

4 × 100

4100

Switch and Control Cards Reference Manual Section 3:

To determine if a given quantity of relay operations can be performed, the previous table must be used to calculate the total power required by applying the example equations:

To check power consumption, each slot power must be computed. The slot power for slots 1 through 3 is added. Also, slot power for slots 4 through 6 are added. The results are called bank powers and should be compared with the maximum limits. Some example calculations follow.

Power budgeting examples

Example 1

This example is for a fully loaded Model 3706A-S with Model 3723 cards (all 2-pole mode).

Slot # Card Channel relays closed Backplane relays closed

This produces the following power consumption:

3700AS-909-01 Rev. C / July 2016 3-3

Section

Reference Manual

Bank #1 power consumed =

4100

12300

Bank #2 power consumed =

4100

12300

Slot 1

3723

107

Slot 2

3723

107

Slot 3

Empty

Slot 4

3723

107

Slot 5

3723

107

Slot 6

Empty

Slot 1 power consumed =

700 + 107 × 50

1 × 100

6150

Slot 2 power consumed =

700 + 107 × 50

1 × 100

6150

Slot 3 power consumed =

0 + 0 + 0 = 0

Slot 4 power consumed =

700 + 107 × 50

1 × 100

6150

Slot 5 power consumed =

700 + 107 × 50

1 × 100

6150

Slot 6 power consumed =

0 + 0 + 0 = 0

Bank #1 power consumed =

6150

+ 0 =

12300

Bank #2 power consumed =

6150

+ 0 =

12300

3: Series 3700A cards power usage Series 3700A Switch and Control Cards

Totals for each bank are calculated:

Slot 1

Slot 4

Slot 2

Slot 5

Slot 3

Slot 6

Total

Since each bank did not exceed the maximum power, the power budget is within the limits.

Example 2

This example is for a partially loaded Model 3706A with Model 3723 cards (all 1-pole mode).

Slot # Card Channel relays closed Backplane relays closed

This produces the following power consumption:

Totals for each bank are calculated:

Slot 1

Slot 4

Slot 2

Slot 5

Slot 3

Slot 6

Total

Since each bank did not exceed the maximum power, the power budget is within the limits.

3-4 3700AS-909-01 Rev. C / July 2016

Series 3700A

Series 3700A cards power usage

Slot 1

3723

60 4 Slot 2

3723

60 4 Slot 3

3723

60 4 Slot 4

3723

Slot 5

3723

Slot 1 power consumed =

700 + 60 × 100

4 × 100

7100

Slot 2 power consumed =

700 + 60 × 100

4 × 100

7100

Slot 3 power consumed =

700 + 60 × 100

4 × 100

7100

Slot 4 power consumed =

700 + 60 × 100

4 × 100

7100

Slot 5 power consumed =

700 + 60 × 100

4 × 100

7100

Slot 6 power consumed =

700 + 60 × 100

4 × 100

7100

Bank #1 power consumed =

7100

21300

Bank #2 power consumed =

7100

21300

Switch and Control Cards Reference Manual Section 3:

Example 3

This example is for a fully loaded Model 3706A-S with Model 3723 cards (all 2-pole mode).

Slot # Card Channel relays closed Backplane relays closed

Slot 6 3723 60 4

This produces the following power consumption:

Totals for each bank are calculated:

Slot 1

Slot 4

Slot 2

Slot 5

Slot 3

Slot 6

Total

Since each bank exceeded the maximum power, some operations will not be performed and an error will be generated.

3700AS-909-01 Rev. C / July 2016 3-5

Section

Reference Manual

Slot 1

3720

20 2 Slot 2

3721

20 2 Slot 3

3722

15 (2-pole)

Slot 4

3723

25 (HI current)

Slot 5

3730

Slot 1 power consumed =

975 + 0 + 2 × 100

1175

Slot 2 power consumed =

1350

+ 0 +

2 × 100

1550

Slot 3 power consumed =

475 + 0 + 4 × 100

875

Slot 4 power consumed =

700 + 25 × 100

2 × 100

3400

Slot 5 power consumed =

780 + 0 + 4 × 100

1180

Slot 6 power consumed =

1000

2 × 200

4 × 100

1800

Bank #1 power consumed =

1175

1550

875 = 3600

Bank #2 power consumed =

3400

1180

1800

6380

3300

Static power required of card under default conditions (that is, all functions enabled)

CH 1,2,3 set as INPUT

CH 4 set as OUTPUT

365

CH 5 set as OUTPUT

365 CH 10 = V mode

470

CH 11 = I mode

470

Total Power

4970 mW

Since total power per bank ca nnot ex ceed 123 00

3: Series 3700A cards power usage Series 3700A Switch and Control Cards

Example 4

This example is for a fully loaded Model 3706A-S with a mix of cards.

Slot # Card Channel relays closed Backplane relays closed

Slot 6 3740 2 4

This produces the following power consumption:

Totals for each bank are calculated:

Slot 1

Slot 4

Slot 2

Slot 5

Slot 3

Slot 6

Total

Since each bank did not exceed the maximum power, the power budget is within the limits.

Example 5

This example demonstrates how to calculate the card power of the 3750.

Setup Power Notes

mW, only two 3750 cards per bank can be populated when used in the example configuration. This leaves spare power (12300 – (4970 * 2)) for controlling relays on a third card in the bank.

3-6 3700AS-909-01 Rev. C / July 2016

Series 3700A

Series 3700A cards power usage

CH 1 through 5 set as 3300

Static power required of card under default conditions (that is, all functions enabled).

365 * 5 = 1825

CH 6 through 9 =

-730

Static power is reduced by disabling the disabled).

output channel.

Total Power

2755 mW

Bank power would not be exceeded if three cards per bank were used in this manner.

conditions (that is, all functions enabled).

CH 6 through 9 = disabled

-730

Static power is reduced by disabling the totalizers (channels cannot be individually disabled).

CH 10 = V mode

470

CH 11 = V mode

470

Total Power

3510 mW

Bank power would not be exceeded if three cards per bank were used in this manner.

Switch and Control Cards Reference Manual Section 3:

Example 6

This example demonstrates how to calculate the card power of the 3750 when used only as digital outputs.

Setup Power Notes

OUTPUT

disabled

totalizers (channels cannot be individually

CH 10 = disabled -820 Static power is reduced by disabling analog

CH 11 = disabled -820 Static power is reduced by disabling analog

Example 7

This example demonstrates how to calculate the card power of the 3750 for digital inputs and two analog voltage outputs.

Setup Power Notes

CH 1 through 5 set as INPUT

3300 Static power required of card under default

Hardware interlocks

Some switching cards are capable of switching high-voltage signals. For safety reasons, hardware interlocks are provided. The hardware interlocks are present on the switching card itself and are designed to keep the switching card disconnected from the system backplane. This means that when the interlock circuit is disengaged, no measurements can be performed through a switching card. However, channel relays can continue to operate.

3700AS-909-01 Rev. C / July 2016 3-7

Below is a simplified schematic of the interlock circuit present on the applicable switching cards.

Section

Reference Manual

3: Series 3700A cards power usage Series 3700A Switch and Control Cards

Figure 2: Simplified interlock circuit

Engaging hardware inter locks

To engage the hardware interlocks, you must provide a low-resistance path between the two applicable interlock pins as shown in the diagram. This path routes a 5 V power source to an onboard interlock relay which in turn enables power to the backplane relays. If a 37xxA-ST accessory terminal board is used, this low resistance path is provided to automatically engage the interlock circuit.

Do not use the supplied 5 V power source for anything other than energizing the interlock relay. It is not designed for external circuit use.

Be sure to provide a low resistance path between the interlock pins for reliable operation. Significant resistance if present can cause the interlock circuit to fail to engage.

Interlock status

Some switching cards have more than one interlock. At any time, the current status of each interlock can be determined by using the appropriate slot[X].interlock.state remote ICL command. When the interlock status reports engaged, associated backplane relays are allowed to be energized. When the interlock status reports disengaged, associated backplane relays are prevented from being energized.

Refer to the Series 3700 A Reference Manual (part number: 3700AS-901-01) for more information on interlock related commands and details.

3-8 3700AS-909-01 Rev. C / July 2016

Series 3700A

Series 3700A cards power usage

3720

Multiplexer #1

76, 78

n911 through n916

Multiplexer #2

76, 78

n921 through n926

DMM

n928 (DMM HI / SHI)

Multiplexer #2

1, 34

n921 through n927

3722

No Interlocks Present

- -

3723

Multiplexer #1

76, 78

n911 through n916

Multiplexer #2

76, 78

n921 through n926

3724

Multiplexer #1

76, 78

n911 through n916

Multiplexer #2

76, 78

n921 through n926

3730

Matrix #1

48, 50

n911 through n916

3731

Matrix #1

38, 50

n911 through n916

3732

Bank 1, 2, 3, 4

J-3-76, J3-78

s0911 through s0918

Bank #1

3750

No interlocks present

Switch and Control Cards Reference Manual Section 3:

Interlock pin numbers

The following table shows the interlock pin numbers for all applicable switching cards.

Model Interlock circuit Interlock pins Backplane relays

affected

3721 Multiplexer #1, Amps,

3740 Independent Switch

33, 50 n911 through n917 n041, n042 (Amps),

48, 50 n911 through n916

Other relays affected

Take special care not to inadvertently wire high-voltage analog signals to the interlock pins. Instrument damage or loss of functionality can occur.

3700AS-909-01 Rev. C / July 2016 3-9

Model 3720 dual 1 × 30 multiplexer card ................................. 4-1

Model 3720 mult iplexer card

In this section:

Model 3720 dual 1 × 30 multiplexer card

Introduction to the Model 3 720 dua l 1 × 30 mul ti plexer card

The Model 3720 offers two independent banks of 1×30 two-pole multiplexers (see next figure). It is ideal for general-purpose switching, including temperature measurements. The two banks can automatically be connected to the Series 3700A mainframe backplane and optional DMM through the analog backplane connection relays. This connection allows the mainframe to reconfigure the card to a single 1×60 two-pole multiplexer or to enable card-to-card expansion for even larger configurations.

Section 4

Other features of the Model 3720 include its ability to be reconfigured to coordinated four-pole operation for additional measurement flexibility. Furthermore, the Model 3720 supports thermocoupletype temperature measurements with the Model 3720-ST (screw terminal) accessory providing automatic cold junction compensation (CJC).

The Model 3720 uses two 78-pin male D-sub connectors for signal connections. For screw terminal or automatic CJC, use the detachable Model 3720-ST accessory.

Figure 3: Model 3720

Section

Reference Manual

4: Model 3720 multiplexer card Series 3700A Switch and Control Cards

Available accessories: Model 3720

Accessory model number Description

Model 3720-MTC-1.5 78-pin female-to-male D-sub cable assembly, 1.5 m (4.9 ft) Model 3720-MTC-3 78-pin female-to-male D-sub cabl e assembl y, 3 m (9.8 ft) Model 3720-ST Screw Terminal panel with CJC sensor Model 3791-KIT78-R 78-pin female D-sub connector kit (solder cup contacts) 7401 Type K thermocouple wire kit

Connection information: M ode l 37 20

Refer to the following figure for the Model 3720 D-sub connection information.

Figure 4: D-sub connection information for th e Model 3720

4-2 3700AS-909-01 Rev. C / July 2016

Series 3700A

Model 3720 multiplexer card

Switch and Control Cards Reference Manual Section 4:

Schematics: Model 3720

The following figure provides a switching schematic for the Model 3720.

Figure 5: Model 3720 schematic

3700AS-909-01 Rev. C / July 2016 4-3

Section

Reference Manual

4: Model 3720 multiplexer card Series 3700A Switch and Control Cards

Figure: Mod el 3720 screw ter minal assembl y circuit board

The next figure is a diagram of the screw terminal assembly:

Figure 6: Model 3720 screw terminal assembly circuit board

4-4 3700AS-909-01 Rev. C / July 2016

Model dual 1 × 20 multiplexer card .......................................... 5-1

In this section:

Model dual 1 × 20 multiplexer card

Introduction to the Model 3 721 dua l 1 × 20 mul ti plexer card

The Model 3721 provides 40 differential channels and automatic cold junction compensation (CJC) with the 3721-ST accessory. The Model 3721 has two independent banks of 1 × 20 two-pole multiplexers that are ideal for general-purpose switching, including temperature measurements.

Section 5

Model 3721 mult iplexer card

The Model 3721 provides a number of other features. In addition to the 40 channels, two fused channels are supplied for current measurements. Also, the Model 3721 includes dedicated inputs that enable 40 channels of 4-wire commonside ohms measurements. For thermocouple-type measurements, automatic CJC is supported with the Model 3721-ST (screw terminal) accessory.

The Model 3721 uses two 50-pin male D-sub connectors for signal connections. For screw terminal or automatic CJC, use the detachable Model 3721-ST accessory.

Figure 7: Model 3721

Section

Reference Manual

Multiplexer # 1 Output

MUX 1 OUT

1 ... 20

Multiplexer # 2 Output

MUX 2 OUT

21 ... 40

Amps Channel 41

AMP1

Amps Channel 42

AMP2

DMM HI & SHI Channel n928

DMM

No Connect

5: Model 3721 multiplexer card Series 3700A Switch and Control Cards

Available accessories: Model 3721

Accessory model number Description

Model 3721-MTC-1.5 50-pin female-to-male D-sub cable assembly, 1.5 m (4.9 ft) Model 3721-MTC-3 50-pin female-to-male D-sub cabl e assembl y, 3 m (9.8 ft) Model 3721-ST Screw terminal panel with CJC sensor Model 3790-KIT50-R 50-pin female D-sub connector kit (solder cup contacts) 7401 Type K thermocouple wire kit

Model 3721-ST accessory board channel list

The following table shows the association between the Model 3721-ST accessory and each channel on the Model 3721.

Channel 3721-ST terminal board silkscreen label

When viewing this table, remember:

• Multiplexer number 1 channels are labeled 1 through 20 and the multiplexer output is labeled

MUX 1 OUT.

• Multiplexer number 2 channels are labeled 21 through 40 and the multiplexer output is labeled

MUX 2 OUT.

• Amps channel 41 is labeled AMP1. This channel is accessed as "n041" where n is the slot

number.

• Amps channel 42 is labeled AMP2. This channel is accessed as "n042" where n is the slot

number.

• DMM HI & SHI channel is labeled DMM. This channel is accessed as "n928" where n is the slot

number.

• No connect channels are labeled NC. Do not connect to these channels.

5-2 3700AS-909-01 Rev. C / July 2016

Series 3700A

Model 3721 multiplexer card

Switch and Control Cards Reference Manual Section 5:

Connection information: Model 3721

Refer to the following figure for the Model 3721 D-sub connection information.

Figure 8: D-sub connection information for the Model 3721

3700AS-909-01 Rev. C / July 2016 5-3

Section

Reference Manual

5: Model 3721 multiplexer card Series 3700A Switch and Control Cards

Schematics: Model 3721

The following figure provides a switching schematic for the Model 3721 in two-pole mode.

Figure 9: Schematic of the Model 3721 in two-pole mode

5-4 3700AS-909-01 Rev. C / July 2016

Series 3700A

21 multiplexer card

Switch and Control Cards Reference Manual Section 5: Model 37

The following figure provides a switching schematic for the Model 3721 in 4-wire commonside ohms mode.

Figure 10: Model 3721 schematic four-wire common side ohm mode

Programming Note

The Model 3721 card has three additional backplane relays for commonside ohms functionality. Use "slotX" or "allslots" to query settings on this card to return information for channels 1 to 40, 911 to 917, 921 to 928. In the response message, there will be three additional commonside ohms backplane relays listed based on bank location. For model 3721, 917 is listed with bank 1, and 927 and 928 are listed with bank 2 after the backplane relays.

For example, to print the channel images on this card when it is in slot 2 after a reset, send the following:

reset() print(channel.getimage('slot2'))

Output from above code:

2001;2002;2003;2004;2005;2006;2007;2008;2009;2010;2011;2012;2013;2014;2015; 2016;2017;2018;2019;2020;2021;2022;2023;2024;2025;2026;2027;2028;2029;2030; 2031;2032;2033;2034;2035;2036;2037;2038;2039;2040;2041;2042;2911;2912;2913; 2914;2915;2916;2921;2922;2923;2924;2925;2926;2917;2927;2928

The commonside ohms backplane relays (2917, 2927, and 2928) are listed based on bank location.

3700AS-909-01 Rev. C / July 2016 5-5

Section

Reference Manual

5: Model 3721 multiplexer card Series 3700A Switch and Control Cards

The next figure is a diagram of the screw terminal assembly:

Figure 11: Model 3721 screw terminal assembly circuit board

Amps channel fuse replacement procedure

Disconnect all external power from the equipment and the line cord before performing any maintenance on the Series 3700A.

Make sure that the Model 3721 card is removed from the system before replacing the amps fuse (see next figures).

Do not use a fuse with a higher current rating than specified or instrument damage can occur. If the Instrument repeatedly blows fuses, locate and correct the cause of the problem before replacing the fuse.

To replace the amps channel fuse:

1. Remove the top shield cover:

a. Unscrew the number 4-40 screw (1) as shown in the "Shield removal" figure below. b. Slide the top cover in a direction away from the D-sub connectors, disengaging the cover from the

printed circuit board.

c. Lift the top shield cover off of the printed circuit board.

5-6 3700AS-909-01 Rev. C / July 2016

Series 3700A

Model 3721 multiplexer card

Switch and Control Cards Reference Manual Section 5:

2. Set jumpers per options listed below.

3. Replace the top shield cover.

• Slide the top cover in a direction toward the D-sub connectors, engaging the cover onto the printed

circuit board, and securing with the number 4-40 scr ew (1).

4. The card can now be returned to service.

Figure 12: Model 3721 shield removal

Figure 13: Fuse location

3700AS-909-01 Rev. C / July 2016 5-7

Section

anual

250 V, 3A

Fast blow

5 × 20 mm

FU-99-1

5: Model 3721 multiplexer card Series 3700A Switch and Control Cards Reference M

Rating Type Size Keithley Instruments part

number

Model 3721: AMPS channels fuse replacement

Channels 41 and 42 are protected by series fuses. In the event of an overload, both channels and the DMM input are protected. The two fuses are replaceable and are located on the printed circuit board of the Model 3721 switch card. The Model 3721 must be removed from the Series 3700A and all power disconnected in order to access these fuses.

5-8 3700AS-909-01 Rev. C / July 2016

Model 3722 dual 1 × 48 high-density multiplexer card ............. 6-1

Model 3722 high-density multiplexer card

In this section:

Model 3722 dual 1 × 48 high-density multiplexer card

Introduction to the Model 3722 c ar d

The Model 3722 has two independent banks of 1 × 48 two-pole multiplexers, which is ideal for applications that require a high channel count. The two banks can automatically be connected to the Series 3700A mainframe backplane and optional digital multimeter (DMM) through the analog backplane connection relays. This connection allows the mainframe to reconfigure the card as a single 1×96 two-pole multiplexer, or to enable card-to-card expansion for even larger configurations. Another feature of this card is the latching electromechanical relays that can accommodate 300 V, 1 A switched signal levels.

Section 6

The Model 3722 uses two 104-pin D-sub connectors for signal connections. A solder-style connector kit (Model 3792-KIT104-R) and pre-assembled cables (Models 3722-MTC-1.5 and 3722-MTC-3) are available for card connections.

Figure 14: Model 3722

Section

Reference Manual

Model 3722-MTC-3

104-pin, male-to-female D-sub cable assembly, 3 m (9.8 ft)

Model 3792-KIT104-R

104-pin, male, D-sub connector kit (solder-cup contacts)

6: Model 3722 high-density multiplexer card Series 3700A Switch and Control Cards

Available accessories: Model 3722

Accessory model number Description

Model 3722-MTC-1.5 104-pin, male-to-female D-sub cable assembly, 1.5 m (4.9 ft)

Connection information: M ode l 37 22

Refer to the following figure for the Model 3722 D-sub connection information.

Figure 15: D-sub connection information the Model 3722

6-2 3700AS-909-01 Rev. C / July 2016

Series 3700A

density multiplexer card

Switch and Control Cards Reference Manual Section 6: Model 3722 high-

Schematics: Model 3722

The following figure provides a switching schematic for the Model 3722.

Figure 16: Schematic for the Model 3722

3700AS-909-01 Rev. C / July 2016 6-3

Model 3723 dual 1 × 30 high-speed multiplexer card ............... 7-1

Model 3723 high-speed reed relay multip lexer card

In this section:

Model 3723 dual 1 × 30 high-speed multiplexer card

Introduction to the Model 3 723 car d

The Model 3723 has two independent banks of high-speed 1 × 30 two-pole multiplexers that are ideal for high-speed scanning applications (see next figure). The two banks can automatically be connected to the Series 3700A mainframe backplane and an optional digital multimeter (DMM) through the analog backplane connection relays. This connection allows the mainframe to reconfigure the Model 3723 as a single 1× 60 two-pole multiplexer or as a single 1 × 30 single-pole multiplexer. It also enables card-to-card expansion for even larger configurations.

Section 7

By using high-speed reed relays with actuation times of less than 0.5 ms, this card can meet the requirements of demanding throughput applications. Another feature of the Model 3723 is its singleended, one-pole mode, which supports up to 120 channels of single-wire measurements. The Model 3723 uses two 78-pin D-sub connectors for signal connections. For screw terminal connections, use the Model 3723-ST for two and four-pole configurations or the Model 3723-ST-1 for single-wire applications.

Figure 17: Model 3723

Section

Reference Manual

(4.9 ft)

Model 3723-ST

Screw terminal panel

Model 3723-ST-1

Screw terminal panel (single-pole)

7: Model 3723 high-speed reed relay multiplexer card Series 3700A Switch and Control Cards

Available accessories: Model 3723

Accessory model number Description

Model 3720-MTC-1.5

Model 3720-MTC-3 78-pin, female-to-male, D-sub cable assembly, 3 m (9.8 ft)

Model 3791-KIT78-R 78-pin, female, D-sub connector kit (solder cup contacts)

78-pin, female-to-male, D-sub cable assembly, 1.5 m

Connection information: M ode l 37 23

Refer to the following figures for the Model 3723 D-sub connection information.

Figure 18: D-sub connection information for the Model 3723 (two-pole mode)

7-2 3700AS-909-01 Rev. C / July 2016

Series 3700A

speed reed relay multiplexer card

Switch and Control Cards Reference Manual Section 7: Model 3723 high-

Figure 19: D-sub connection information for the Model 3723 (one-pole mode)

3700AS-909-01 Rev. C / July 2016 7-3

Section

Reference Manual

7: Model 3723 high-speed reed relay multiplexer card Series 3700A Switch and Control Cards

Schematics: Model 3723

The following figure provides a switching schematic for the Model 3723 in two-pole mode.

Figure 20: Schematic for the Model 3723 in two-pole mode

7-4 3700AS-909-01 Rev. C / July 2016

Series 3700A

speed reed relay multiplexer card

Switch and Control Cards Reference Manual Section 7: Model 3723 high-

The following figure provides a switching schematic for the Model 3723 in single-pole mode.

Figure 21: Schematic: Model 3723 in one-pole mode

3700AS-909-01 Rev. C / July 2016 7-5

Section

Reference Manual

7: Model 3723 high-speed reed relay multiplexer card Series 3700A Switch and Control Cards

The next figure is a diagram of the screw terminal assembly:

Figure 22: Model 3723 screw terminal assembly circuit board

7-6 3700AS-909-01 Rev. C / July 2016

Series 3700A

speed reed relay multiplexer card

Switch and Control Cards Reference Manual Section 7: Model 3723 high-

The Model 3723-ST-1 screw terminal assembly has a chassis ground connection for connecting a cable shield (see next figure).

Figure 23: Model 3723-ST-1 screw terminal assembly

3700AS-909-01 Rev. C / July 2016 7-7

Model 3724 dual 1 × 30 FET multiplexer card .......................... 8-1

Model 3724 FET multiplexer card

In this section:

Model 3724 dual 1 × 30 FET multiplexer card

Introduction to the Model 3724 card

The Model 3724 has two independent banks of 1 × 30 2-pole multiplexers. It is ideal for generalpurpose switching, including temperature measurements. The two banks can automatically be connected to the Series 3700A mainframe backplane and an optional digital multimeter (DMM) through the analog backplane connection relays. This connection allows the mainframe to reconfigure the card to a single 1 × 60 two-pole multiplexer, or to enable card-to-card expansion for even larger configurations.

Section 8

Other features of the Model 3724 include its ability to be reconfigured to coordinated four-pole operation for additional measurement flexibility. Furthermore, the Model 3724 supports thermocoupletype temperature measurements with the Model 3724-ST (screw terminal) accessory, providing automatic cold junction compensation (CJC).

The Model 3724 uses two 78-pin male D-sub connectors for signal connections. For screw terminal or automatic CJC, use the detachable Model 3724-ST accessory.

Figure 24: Model 3724 Dual 1x30 FET Multiplexer

Section

Reference Manual

Model 3720-MTC-3

78-pin D-sub female-to-male cable, 3 m (9.8 ft)

Model 3724-ST

Screw terminal panel

Model 3791-KIT78-R

78-pin, female D-sub connector kit (contains 2 female D-

8: Model 3724 FET multiplexer card Series 3700A Switch and Control Cards

Available accessories: Model 3724

Accessory model number Description

Model 3720-MTC-1.5 78-pin D-sub female-to-male cable, 1.5 m (4.9 ft)

Model 3791-CIT Contact insertion and extraction tool

sub connectors and 156 solder cups)

Connection information: M ode l 37 24

Refer to the following figure for the Model 3724 D-sub connection information.

Figure 25: Model 3724 connection information

8-2 3700AS-909-01 Rev. C / July 2016

Series 3700A

Model 3724 FET multiplexer card

Switch and Control Cards Reference Manual Section 8:

Schematics: Model 3724

The following figure provides a switching schematic for the Model 3724.

Figure 26: Model 3724 schematic

3700AS-909-01 Rev. C / July 2016 8-3

Section

Reference Manual

8: Model 3724 FET multiplexer card Series 3700A Switch and Control Cards

The next Figure is a diagram of the screw terminal assembly:

Figure 27: Model 3724 screw terminal assembly circuit board

8-4 3700AS-909-01 Rev. C / July 2016

Model 3730 6 × 16 high-density matrix card ............................ 9-1

Model 3730 high-density matrix card

In this section:

Model 3730 6 × 16 high-density matrix card

Introduction to the Model 3 730 c ar d

The Model 3730 is a two-pole, 6 × 16 column matrix card. It can connect up to six differential instrument channels to any combination of 16 devices under test (DUTs). Any row can be connected to the Series 3700A mainframe backplane by using the analog backplane connection relays. This allows for easy matrix column expansion. A matrix of up to six rows by 96 columns can be supported within a single Model 3706A mainframe (with six Model 3730 cards).

Section 9

The Model 3730 uses two 50-pin male D-sub connectors for signal connections. For screw terminal connections, use the detachable Model 3730-ST accessory.

Figure 28: Model 3730

Section

Reference Manual

(4.9 ft

Model 3730-ST

Screw terminal panel

Model 3790-KIT50-R

50-pin, female, D-sub connector kit (solder cup contacts)

9: Model 3730 high-density matrix card Series 3700A Switch and Control Cards

Available accessories: Model 3730

Accessory model number Description

Model 3721-MTC-1.5

Model 3721-MTC-3 50-pin, female-to-male, D-sub cable assembly, 3 m (9.8 ft)

50-pin, female-to-male, D-sub cable assembly, 1.5 m

Connection information: M ode l 37 30

Refer to the following figure for the Model 3730 D-sub connection information.

Figure 29: D-sub connection information for the Model 3730

9-2 3700AS-909-01 Rev. C / July 2016

Series 3700A

density matrix card

Switch and Control Cards Reference Manual Section 9: Model 3730 high-

Schematics: Model 3730

The following figure provides a relay schematic for the Model 3730.

Figure 30: Schematic of the Model 3730

The channels on the Model 3730 are matrix channels. Unlike multiplexer (MUX) channels, matrix channels do not have a DMM configuration associated with them. Therefore, specifying a matrix channel in the channel list paramet er to the dmm.setconfig() function generates an error. To connect a DMM configuration to matrix channels, create a channel pattern with desired channels and analog backplane relays.

For channel patterns, the system does not verify if the pathway is correct, or if the correct analog backplane relays are specified for the desired function.

3700AS-909-01 Rev. C / July 2016 9-3

Section

Reference Manual

9: Model 3730 high-density matrix card Series 3700A Switch and Control Cards

The next figure is a diagram of the screw terminal assembly:

The Model 3730-ST screw terminal assembly has a chassis ground connection for connecting a cable shield.

Figure 31: Model 3730 screw terminal assembly circuit board

9-4 3700AS-909-01 Rev. C / July 2016

Model 3731 6 × 16 high-speed reed matrix card .................... 10-1

Model 3731 high-speed reed relay matrix card

In this section:

Model 3731 6 × 16 high-speed reed matrix card

Introduction to the Model 3731 card

The Model 3731 is a two-pole, six-row by 16-column reed relay matrix card. Using high-speed reed relays with actuation times of 0.5 ms, this card meets the requirements of demanding throughput applications. In addition, the Model 3731 is designed for long life, exceeding one billion operations.

Section 10

The Model 3731 can connect up to six differential instrument channels to any combination of 16 devices under test (DUTs). Any row can be connected to the Series 3700A mainframe backplane using the analog backplane connection relays, allowing for matrix column expansion. A matrix of up to six rows by 96 columns can be supported within a single Model 3706A mainframe (using six Model 3731 cards).

Figure 32: Model 3731 card

Section

Reference Manual

(4.9 ft

Model 3731-ST

Screw terminal panel

Model 3731-KIT50-R

50-pin, female, D-sub connector kit (solder cup contacts)

10: Model 3731 high-speed reed relay matrix card Series 3700A Switch and Control Cards

Available accessories: Model 3731

Accessory model number Description

Model 3721-MTC-1.5

Model 3721-MTC-3 50-pin, female-to-male, D-sub cable assembly, 3 m (9.8 ft)

50-pin, female-to-male, D-sub cable assembly, 1.5 m

Connection informati on: M ode l 3 7 31

The Model 3731 uses two 50-pin male D-sub connectors for signal connections. Use the detachable Model 3731-ST accessory for screw terminal connections. Refer to the following figure for the Model 3731 D-sub connection information.

Figure 33: Model 3731 pin connections

10-2 3700AS-909-01 Rev. C / July 2016

Series 3700A

speed reed relay matrix card

Switch and Control Cards Reference Manual Section 10: Model 3731 high-

Schematics: Model 3731

The following figure provides a relay schematic for the Model 3731.

Figure 34: Model 3731 simplified crosspoint relay schematic

The next figure is a diagram of the screw terminal assembly:

The Model 3731-ST screw terminal assembly has a chassis ground connection for connecting a cable shield.

3700AS-909-01 Rev. C / July 2016 10-3

Section

Reference Manual

10: Model 3731 high-speed reed relay matrix card Series 3700A Switch and Control Cards

Figure 35: Model 3731 screw terminal assembly circuit board

10-4 3700AS-909-01 Rev. C / July 2016

Using remote commands from a remote interface ............... 11-50

Section 11

Model 3732 quad 4 × 28 r eed relay matrix card

In this section:

Introduction ............................................................................ 11-1

Accessories for Model 3732 ................................................... 11-2

Maximum power usage with Model 3732 cards ..................... 11-2

Measurement considerations ................................................. 11-2

Card configurations .............................................................. 11-13

Model 3732 2-pole operation................................................ 11-34

Cross-card expansion .......................................................... 11-47

Using the Model 3732 with a digital multimeter .................... 11-48

Using the Series 3700A front panel with the Model 3732 card

............................................................................................. 11-49

Pseudocard support for the Model 3732 .............................. 11-49

Introduction

The Model 3732 quad 4 × 28 ultra-high density reed relay matrix card has four independent banks of 4 × 28 single-pole, ultra-high density reed relay matrices (448 crosspoints) that can be configured using relays, jumpers, and screw-terminal assemblies to create five different switch matrix configurations.

Figure 36: Model 3732 card

Section

Reference Manual

Model 3732-ST-C

Column expansion screw terminal assembly for quad 4 × 28, dual 5 × 56, and single 4 × 112

Model 3732-ST-R

Row expansion screw terminal assembly for single 16 × 28 or dual 8 × 28 matrix configurations

Model 3732-MTC-1.5

78-pin D-sub female-to-male cable, 5 ft (1.5 m)

Model 3791-CIT

Contact insertion and extraction tool

Model 3791-KIT78-R

78-pin, female D-sub connector kit; contains two female D-sub connectors and 156 solder-cup contacts

11: Model 3732 quad 4 × 28 reed relay matrix card Series 3700A Switch and Control Cards

Additional features

These additional features differentiate the Model 3732 card from other Series 3700A switching cards:

• Bank configuration relays mounted on the Model 3732 card allow you to automate bank

connections, and the two-pole mode enables automatic channel pairing for differential (2-wire) measurements.

• Analog backplane relays can be used to connect rows to the Series 3700 mainframe backplane

for larger matrix configurations that use multiple Model 3732 cards.

• The Model 3732 card has optimized reed relays that minimize switching errors and allow greater

signal voltage and current dynamic range in automated test applications that require long life and fast actuation times.

• The Model 3732 card has two 78-pin D-sub connectors, and two optional screw terminal

assemblies are available (Models 3732-ST-C and 3732-ST-R).

Accessories for Model 3732

Available accessories for the Keithley Instruments Model 3732 4 × 28 Ultra-High Density Reed Relay Matrix Card are listed in the table below.

Model 3732 available accessories

Accessory model number

Model 3732-MTC-3 78-pin D-sub female-to-male cable, 10 ft (3 m)

Description

matrix configurations

Maximum power usage with Model 3732 cards

Model 3732 cards are capable of switching many relays at once, which can use a substantial amount of system power. Because there is a limited amount of power available for switching relays, you must ensure that maximum available power is not exceeded.

Refer to the Model 3732 datasheet for model-specific power consumption and quiescent power information. For a more detailed explanation of power usage, budgeting, and calculation, see the "Series 3700A Module Schematics and Connections" section in the Series 3700A Reference Manual (part number 3700AS-900-01). Both of these documents are available for download from the Keithley

Downloads web page

(http://www.tek.com/downloads).

Measurement considerations

The Model 3732 uses two 78-pin male D-sub connectors for signal connections. The detachable Models 3732-ST-R and 3732-ST-C screw terminal assemblies can be used for row and column

11-2 3700AS-909-01 Rev. C / July 2016

expansion (the Model 3732-ST-C can also be used for direct connections).

Series 3700A

Model 3732 quad 4 × 28 reed relay matrix card

Switch and Control Cards Reference Manual Section 11:

Channel specifiers

The Series 3700A mainframe supports a wide variety of cards. Functional elements on these cards are referred to as "channels." Individual elements on each card (switch, relay, digital to analog converter (DAC), digital I/O, and so on) are referenced with a channel specifier. These specifiers specify channels for use with close and open operations, scans, and channel patterns using the front panel, web, or remote command interface.

A channel specifier is a four or five-digit alphanumeric sequence. The first digit is always the slot number of the card in the mainframe. The remaining digits vary depending on the type of card.

Channel types

There are six channel types used to control relays:

• Multiplexer (MUX)

• Matrix

• Backplane

• Digital I/O

• Totalizer

• Digital analog converter (DAC)

The channels available on a card are defined by the type of card. The documentation for your specific card lists the available channels.

Specify multiple channels using lists and ranges (a sequence of channels). Lists and ranges build upon the individual channel specifier.

The following topics describe the channel specifier in more detail and provide generic examples (which may or may not be suitable for your installed cards).

Channel and backplane notation

There are four different notation styles used to control relays:

1. MUX (multiplexer) channel notation

2. Channel specifiers

3. Backplane relay notation

4. Digital I/O, totalizer, and DAC notation

3700AS-909-01 Rev. C / July 2016 11-3

Section

Reference Manual

1004 1 004

1020 1 020

2100 2 100

3003 3 003

11: Model 3732 quad 4 × 28 reed relay matrix card Series 3700A Switch and Control Cards

MUX (multiplexer) channel notation

To specify channels using the multiplexer (MUX) card notation, use SCCC, where: S = slot number CCC = Channel number (always use 3 digits)

Multiplexer examples

References Slot Channel

Figure 37: Model 3732 multiplexer card display

11-4 3700AS-909-01 Rev. C / July 2016

Series 3700A

Model 3732 quad 4 × 28 reed relay matrix card

1A05

N/A 1 05

1C05

N/A 3 05

3C12

N/A 3 12

11104

1 1 1

1203 1 N/A 2 03

3112 3 N/A 1 12

62101

6 2 1

Switch and Control Cards Reference Manual Section 11:

Channel specifiers

The channels on the matrix cards are referred to by their slot, bank, row, and column numbers:

• Slot number: The number of the slot in which the card is installed.

• Bank: The bank number, if used by your card. See your card documentation.

• Row number: The row number is either 1 to 8 or A to Z. See your card documentation.

• Column number: Always two digits. For columns greater than 99, use A, B, C and so on to

represent 10, 11, 12, …; the resulting counting sequence is: 98, 99, A0, A1, …, A8, A9, B0, B1,...

Matrix channel examples

Reference Slot Bank Row Column

1104 1 N/A 1 04

213A4 2 1 3 104

Figure 38: Model 3732 matrix card display showing channel identifier

Figure 39: Model 3732 matrix card display slot 6

3700AS-909-01 Rev. C / July 2016 11-5

Section

Manual

1922

analog backplane relay 2

1923

analog backplane relay 3

1925

analog backplane relay 5

1926

analog backplane relay 6

1004 1 004

1020 1 020

2100 2 100

3003 3 003

Column expansion

1-pole

Quad 4 × 28, dual 4 × 56, single 4 × 112

Modular screw terminal assembly

Model 3732-ST-C

Dual 8 × 28, single 2-pole

Single 8 × 28

Custom configuration

Any

User-defined

Direct wiring with prefabricated cable assemblies

Model 3732-MTC

Direct wiring with D-sub connectors

Model 3791-KIT78-R

11: Model 3732 quad 4 × 28 reed relay matrix card Series 3700A Switch and Control Cards Reference

Backplane relay notation To control analog backplane relays for slots with analog backplane relay channels, use S9BX where: S = Slot number 9 = Backplane notation designation (always 9 when referencing a backplane relay) B = Bank number X = Analog backplane relay number

Analog backplane relays (bank 2 of Slot 1) examples

Reference Slot

1921 analog backplane relay 1

1924 analog backplane relay 4

Digital I/O, totalizer, a n d DAC notation To specify digital I/O, totalize, or digital-to-an alog con v erter chan nels, us e SIII, where: S = Slot number III = Index number (always use 3 digits)

Digital I/O, totalizer, and DAC examples

Reference Slot Channel

Configuration and connec t ion choices overview

Before configuring your card, you will need to decide which base matrix configur ati on you will use, and how you want to wire the connections. The next table lists these options.

Configuration and connection choices

Configuration type Mode M atrix configurations Wiring method Accessory to use

Row expansion

2-pole

1-pole

Dual 4 × 28, single 4 ×

Modular screw terminal assembly Model 3732-ST-R

16 × 28

11-6 3700AS-909-01 Rev. C / July 2016

and solder-cup contacts

Series 3700A

Model 3732 quad 4 × 28 reed relay matrix card

Switch and Control Cards Reference Manual Section 11:

Screw terminal assemblies

You can use screw terminal assemblies as an easy way to create matrix configurations without any direct wiring. There are two screw terminal assemblies available for use with the Model 3732 card: Model 3732-ST-C for column expansion, and Model 3732-ST-R for row expansion.

Important configuration information: The Series 3700A mainframe does not support "hot swapping" of cards, which means there is a possibility that the Model 3732 card may not be in the expected configuration when you turn on the instrument power after removing a screw terminal that was connected when the instrument was last turned on. To ensure that you do not change your configuration, note that the Series 3700A instrument power must be turned on AND the interlock must be connected and activated when you make configuration changes. If the interlock is not activated when power is reapplied, the Model 3732 ID bits that define the card’s configuration will not be read, and the default configuration will be what the configuration was the last time when the power was turned on with the interlock activated.

Additional information about screw terminal assemblies is available in the Series 3700A Screw Terminal Assemblies Installation Instructions (part number PA-955), which can be downloaded from the Keithley Downloads web page (http://www.tek.com/downloads).

Model 3732-ST-C screw terminal assembly

The next figure is a diagram of the Model 3732-ST-C screw terminal assembly.

The Model 3732-ST-C screw terminal assembly is labeled to show the correct connections for the default quad 4 × 28 configuration. Insertable overlays are provided with the screw terminal assembly that show the correct wiring for the dual 4 × 56, single 4 × 112, dual 4 × 18 (2-pole), and single 4 × 56 (2-pole) configurations.

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Section

Reference Manual

ID2

ID1

Configuration

OFF

Quad 4 × 28

OFF

Dual 4 × 56

OFF

Dual 4 × 56

Single 4 × 112

11: Model 3732 quad 4 × 28 reed relay matrix card Series 3700A Switch and Control Cards

Figure 40: Model 3732-ST-C screw terminal assembly circuit board

Model 3732-ST-C jumper settings

The next table shows the jumper settings for the configurations available using the Model 3732-ST-C screw terminal assembly with your Model 3732 card.

Model 3732-ST-C jumper settings

These ID bits are only read when the instrument is turned on with the interlock activated.

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Series 3700A

Model 3732 quad 4 × 28 reed relay matrix card

ID1

Configuration

OFF

Dual 8 × 28

Single 16 × 28

Switch and Control Cards Reference Manual Section 11:

Model 3732-ST-R screw terminal assembly

The next figure is a diagram of the Model 3732-ST-R screw terminal assembly.

The Model 3732-ST-R screw terminal assembly is labeled to show the correct connections for the dual 8 × 28 configuration. Insertable overlays are provided with the screw terminal assembly that show the correct wiring for the single 16 × 28 and single 8 × 28 (2-pole) configurations.

Figure 41: Model 3732-ST-R screw terminal assembly circuit board

3700AS-909-01 Rev. C / July 2016 11-9

Model 3732-ST-R jumper settings

These ID bits are only read when the instrument is turned on with the interlock activated.

Section

Reference Manual

BPID1

J4, Pin 76

Open*

Open

J4, Pin 77

Open

J4, Pin 77

BPID2

J4, Pin 78

Open

J4, Pin 77

Open

J4, Pin 77

Not used

+IILK

J3, Pin 76

J3, Pin 78

-ILK

J3, Pin 7 8

J3, Pin 76

J3, Pin 78

J3, Pin 76

*Open = No connection

11: Model 3732 quad 4 × 28 reed relay matrix card Series 3700A Switch and Control Cards

Direct wiring

You can also use direct wiring to create custom connections to the Model 3732 card.

Before making or breaking connections, make sure you turn off the Series 3700A and disconnect the line cord. Also, remove any other external power connected to the instrument, Series 3700A cards, or connected devices under test (DUTs). Failure to disconnect power before making or breaking connections may result in personal injury or death due to electric shock.

The next table shows modified jumper settings for direct wiring using the Model 3791-KIT78-R D-sub connector kit, Model 3720-MTC-3 cables, or Model 3720-MTC-1.5 cables to create different configurations.

Modified jumper settings and connections for direct wiring:

Signal Connector

and pin location

BPID3 J3, Pin 77 Open Open J4, Pin 77 Open J4, Pin 77 J4, Pin 77

**There are two different ways to direct-wire the dual 4 × 56 configuration. The first column shows one way to connect and the second shows an alternative.

Configuration

Dual 4 × 56**

Dual 8 × 28 Single

16 × 28

For detailed D-sub connector pin assignment information, refer to the "Pin assignments and signal naming" tables for the desired configuration in the Card configurations (on page 11-13) topic.

Hardware interlocks

The Model 3732 card and Series 3700A have hardware interlocks to prevent unsafe exposure to high-voltage signals. These interlocks are designed to keep the Model 3732 disconnected from the system backplane. To close any Model 3732 backplane relays, the interlock circuit must be engaged by connecting the +ILK and -ILK signals. If you attempt to close a backplane relay without these signals connected, the relay will not close and an error message will be displayed.

11-10 3700AS-909-01 Rev. C / July 2016

Series 3700A

lay matrix card

Interlock circuit

Interlock pins

Backplane relays affected

Other relays affected

Bank 1, 2, 3, 4

J3-76, J3-78

s0911 through s0918

none

Switch and Control Cards Reference Manual Section 11: Model 3732 quad 4 × 28 reed re

Model 3732 interlock pin numbers

The next table shows the Model 3732 interlock pin numbers. Model 3732 interlock pin numbers

For detailed information about engaging hardware interlocks and determining interlock status, refer to the Series 3700A System Switch/Multimeter Reference Manual (part number 3700AS-901-01), available for download from the Keithley Downloads web page

(http://www.tek.com/downloads).

Channel specifiers

To use the Model 3732 ultra-high density reed relay matrix card, you will need to understand channel specifiers and the two notation styles used with the Model 3732 card.

A channel specifier is a four or five-digit alphanumeric sequence that specifies channels for use with close and open operations, scans, and channel patterns. The first digit is always the slot number of the card in the mainframe. The remaining digits vary depending on the type of card. For the Model 3732 card, the channel descriptor for the matrix channel type has been extended, allowing you to denote the desired bank under some configurations.

For complete information about all Series 3700A channel types and specifiers, refer to the Series 3700A System Switch/Mult imeter Refer e nc e Manu al (part number 3700AS-901-01), available for download from the Keithley Downloads web page (http://www.tek.com/downloads).

Notation styles

There are two notation styles used to control the Model 3732 card relays, Refer to the following for more information: Matrix card notation (on page 11-12) and Backplane relay notation (on page

12).

11-

3700AS-909-01 Rev. C / July 2016 11-11

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Reference Manual

Slot number

Bank

Some cards use a range of 1 to 4 or 1 to 8; other cards use a range of A to P (refer to the card's documentation)

column 109. Use B0 for column 110, B1 for column 111, and B2 for column 112.

*All Model 3732 configurations use numbers for the rows except the single 16 × 28 configuration, which uses numbers and the letters A and B for the rows.

Reference

Slot

Bank

Row

Column

11104

1 1 1

62101

6 2 1

Slot number

Always 9 for Model 3732 backplane relays

Always 1 for Model 3732 backplane relays

11: Model 3732 quad 4 × 28 reed relay matrix card Series 3700A Switch and Control Cards

Matrix card notation

To specify channels using matrix card notation, use SBRCC, where:

Row number*

Column number (always use 2 digits)

For columns greater than 99, use A0 for column 100, A1 for column 101, A2 for column 102, and so on, through A9 for

Matrix channel examples The next table shows some examples of possible channel specifiers for the Model 3732 card using

matrix card notation. Example matrix card notation channel specifiers:

213A4 2 1 3 104

31J12 3 1 10 12

Channel numbering example The next figure shows what the numbers represent in the crosspoint schematics that appear in each

of the Model 3732 configuration descriptions that follow. Note that this specific example represents a Model 3732 card installed in slot 1, configured for the quad 4 × 28 configuration.

Figure 42: Channel numberin g in matrix crosspoint schematics

Backplane relay notation

To control analog backplane relays for slots with analog backplane relay channels, use S091X, where:

0 Always zero for Model 3732 backplane relays

X Analog backplane relay number

11-12 3700AS-909-01 Rev. C / July 2016

Series 3700A

Model 3732 quad 4 × 28 reed relay matrix card

Reference

Series 3700A mainframe analog backplane

10912

Analog backplane 2

10913

Analog backplane 3

10915

Analog backplane 5

10916

Analog backplane 6

10917

Analog backplane 1

Switch and Control Cards Reference Manual Section 11:

Backplane relay examples The next table shows the channel specifiers for the Model 3732 card using backplane relay notation.

Note that this example represents the backplane relays of a card located in slot 1.

Example backplane relay notation channel specifiers:

10911 Analog backplane 1

10914 Analo g backplane 4

10918 Analog backplane 2

Card configurations

The Model 3732 has five main configurations in 1-pole mode:

• Quad 4 × 28 configuration (on page 11-13)

• Dual 4 × 56 configuration (on page 11-18)

• Single 4 × 112 configuration (on page 11-22)

• Dual 8 × 28 configuration (on page 11-26)

• Single 16 × 28 configuration (on page 11-30)

You can also use 2-pole mode for three additional configurations:

• Dual 4 × 28 2-pole configuration (on page 11-35)

• Single 4 × 56 2-pole configuration (on page 11-39)

• Single 8 × 28 2-pole configuration (on page 11-43)

The following sections contain details for each configuration, including: D-sub connectors, pin assignments and signal naming, crosspoint relay schematics, and connection logs.

Single-pole configurat ions

Quad 4 × 28 configuration

The quad 4 × 28 configuration, which is the default configuration for the Model 3732 card, allows you to connect four separate banks of 28 crosspoints using jumpers, relays, or the Model 3732-ST-C screw terminal assembly.

Refer to the Screw terminal assemblies (on page 11-7) and Direct wiring (on page 11-10) topics for more information about jumper settings.

3700AS-909-01 Rev. C / July 2016 11-13

The five main Model 3732 configurations (1-pole) are described in the sections that follow.

Section

Reference Manual

11: Model 3732 quad 4 × 28 reed relay matrix card Series 3700A Switch and Control Cards

D-sub connections: Quad 4 × 28 configuration

The next figure shows the D-sub pin connections for the Model 3732 quad 4 × 28 configuration.

Figure 43: Quad 4 × 28 D-sub pin connections

11-14 3700AS-909-01 Rev. C / July 2016

Series 3700A

Model 3732 quad 4 × 28 reed relay matrix card

Switc h and Control Cards Reference Manual Section 11:

Pin assignments and signal naming: Quad 4 × 28 configuration

The Model 3732 is set to the quad 4 × 28 configuration by default. The next tables show the pin signal name for each pin on each of the D-sub connectors, and list the location of the connection in the switch matrix.

J3 D-sub connector pin assignments for the quad 4 × 28 configuration:

Figure 44: Model 3732 J3 D-sub connector pin assignments quad 4 × 28

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Section

Reference Manual

11: Model 3732 quad 4 × 28 reed relay matrix card Series 3700A Switch and Control Cards

J4 D-sub connector pin assignments for the quad 4 × 28 configuration:

Figure 45: Model 3732 J4 D-sub connector pin assignments quad 4 × 28

11-16 3700AS-909-01 Rev. C / July 2016

Series 3700A

Model 3732 quad 4 × 28 reed relay matrix card

Switch and Control Cards Reference Manual Section 11:

Matrix crosspoint schematic: Quad 4 × 28 configuration

The next figure is a simplified crosspoint schematic of the quad 4 × 28 matrix configuration.

Figure 46: Model 3732 4 × 28 crosspoint matrix

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Section

Reference Manual

11: Model 3732 quad 4 × 28 reed relay matrix card Series 3700A Switch and Control Cards

Dual 4 × 56 configuration

The dual 4 × 56 configuration allows you to create two banks of 224 crosspoints using bank configuration relays mounted on the Model 3732 card. The columns of these two banks can then be connected using jumpers, relays, or the Model 3732 -ST-C screw terminal assembly.

Refer to the Screw terminal assemblies (on page 11-7) and Direct wiring (on page 11-10) topics for more information about jumper settings.

D-sub connections: Dual 4 × 56 configuratio n

The next figure shows the D-sub pin assignments for the dual 4 × 56 configuration.

Figure 47: Dual 4 × 56 D-sub pin connections

11-18 3700AS-909-01 Rev. C / July 2016

Series 3700A

Model 3732 quad 4 × 28 reed relay matrix card

Switch and Control Cards Reference Manual Section 11:

Pin assignments and signal naming: Dual 4 × 56 configuration

The next tables show the pin signal name for each pin on each of the D-sub connectors, and list the location of the connection in the switch matrix.

J3 D-sub connector pin assignments for the dual 4 × 56 configuration:

Figure 48: Model 3732 J3 D-sub connector pin assignments quad 4 × 56

3700AS-909-01 Rev. C / July 2016 11-19

Section

Reference Manual

11: Model 3732 quad 4 × 28 reed relay matrix card Series 3700A Switch and Control Cards

J4 D-sub connector pin assignments for the dual 4 × 56 configuration:

Figure 49: Model 3732 J4 D-sub connector pin assignments dual 4 × 56

11-20 3700AS-909-01 Rev. C / July 2016

Series 3700A

Model 3732 quad 4 × 28 reed relay matrix card

Switch and Control Cards Reference Manual Section 11:

Schematic: Dual 4 × 56 configuration

The next figure is a simplified crosspoint schematic of the dual 4 × 56 matrix configuration.

Figure 50: Dual 4 × 56 simplified crosspoint schematic

3700AS-909-01 Rev. C / July 2016 11-21

Section

Reference Manual

11: Model 3732 quad 4 × 28 reed relay matrix card Series 3700A Switch and Control Cards

Single 4 × 112 configuration

The single 4 × 112 configuration allows you to connect four banks of 112 crosspoints into a single matrix of 448 crosspoints using bank configuration relays mounted on the Model 3732 card. The columns of these four banks can then be connected using jumpers, relays, or the Model 3732-ST-C screw terminal assembly.

Refer to the Screw terminal assemblies (on page 11-7) and Direct wiring (on page 11-10) topics for more information about jumper settings.

D-sub connections: Single 4 × 112 configuration

The next figure shows the D-sub pin assignments for the single 4 × 112 configuration.

Figure 51: Single 4 × 112 D-sub pin connections

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Series 3700A

Model 3732 quad 4 × 28 reed relay matrix card

Switch and Control Cards Reference Manual Section 11:

Pin assignments and signal naming: Sin g le 4 × 112 configuration

The next tables show the pin signal name for each pin on each of the D-sub connectors, and list the location of the connection in the switch matrix.

J3 D-sub connector pin assignments for the single 4 × 112 configuration:

Figure 52: Model 3732 J3 D-sub connector pin assignments quad 4 × 112

3700AS-909-01 Rev. C / July 2016 11-23

Section

Reference Manual

11: Model 3732 quad 4 × 28 reed relay matrix card Series 3700A Switch and Control Cards

J4 D-sub connector pin assignments for the single 4 × 112 configuration:

Figure 53: Model 3732 J4 D-sub connector pin assignments quad 4 × 112

11-24 3700AS-909-01 Rev. C / July 2016

Series 3700A

Model 3732 quad 4 × 28 reed relay matrix card

Switch and Control Cards Reference Manual Section 11:

Schematic: Single 4 × 112 configura tion

The next figure is a simplified crosspoint schematic of the single 4 × 112 matrix configuration.

Figure 54: Single 4 × 112 simplified crosspoint schematic

3700AS-909-01 Rev. C / July 2016 11-25

Section

Reference Manual

11: Model 3732 quad 4 × 28 reed relay matrix card Series 3700A Switch and Control Cards

Dual 8 × 28 configuration

The dual 8 × 28 configuration allows you to use row expansion to create two banks of 224 crosspoints (each bank consisting of 8 rows and 28 columns) using jumpers, relays, or the Model 3732-ST-R screw terminal assembly.

Refer to the Screw terminal assemblies (on page 11-7) and Direct wiring (on page 11-10) topics for more information about jumper settings.

D-sub connections: Dual 8 × 28 configuratio n

The next figure shows the D-sub pin assignments for the dual 8 × 28 configuration.

Figure 55: Dual 8 × 28 D-sub pin connection s

The pinouts in the previous figure represent the pin connections that are made when the Model 3732-ST-R screw terminal is attached to the Model 3732 J3 and J4 connectors. If the Model 3732ST-R is not attached, you must connect the pins with the same name together externally; they are not connected on the Model 3732 card for this mode.

11-26 3700AS-909-01 Rev. C / July 2016

Series 3700A

Model 3732 quad 4 × 28 reed relay matrix card

Switch and Control Cards Reference Manual Section 11:

Pin assignments and signal naming: Dual 8 × 28 configuration

The next tables show the pin signal name for each pin on each of the D-sub connectors, and list the location of the connection in the switch matrix.

J3 D-sub connector pin assignments for the dual 8 × 28 configuration:

Figure 56: Model 3732 J3 D-sub connector pin assignments dual 8 × 28

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Section

11: Model 3732 quad 4 × 28 reed relay matrix card Series 3700A Switch and Control Cards Reference Manua

J4 D-sub connector pin assignments for the dual 8 × 28 configuration:

Figure 57: Model 3732 J4 D-sub connector pin assignments dual 8 × 28

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Model 3732 quad 4 × 28 reed relay matrix card

Switch and Control Cards Reference Manual Section 11:

Schematic: Dual 8 × 28 configuration

The next figure is a simplified crosspoint schematic of the dual 8 × 28 matrix configuration.

Figure 58: Dual 8 × 28 simplified crosspoint schematic

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11: Model 3732 quad 4 × 28 reed relay matrix card Series 3700A Switch and Control Cards

Single 16 × 28 configuration

The single 16 × 28 configuration allows you to use row expansion to create a single bank consisting of 16 rows and 28 columns using jumpers, relays, or the Model 3732-ST-R screw terminal assembly.

Refer to the Screw terminal assemblies (on page 11-7) and Direct wiring (on page 11-10) topics for more information about jumper settings.

D-sub connections: Single 16 × 28 configuratio n

The next figure shows the D-sub pin assignments for the single 16 × 28 configuration.

Figure 59: Single 16 × 28 D-sub pin connections

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Model 3732 quad 4 × 28 reed relay matrix card

Switch and Control Cards Reference Manual Section 11:

Pin assignments and signal naming: Sin g le 16 × 28 configuration

The next tables show the pin signal name for each pin on each of the D-sub connectors, and list the location of the connection in the switch matrix.

J3 D-sub connector pin assignments for the single 16 × 28 configuration:

Figure 60: Model 3732 J3 D-sub connector pin assignments single 16 × 28

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11: Model 3732 quad 4 × 28 reed relay matrix card Series 3700A Switch and Control Cards

J4 D-sub connector pin assignments for the single 16 × 28 configuration:

Figure 61: Model 3732 J4 D-sub connector pin assignments single 16 × 28

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relay matrix card

Switch and Control Cards Reference Manual Section 11: Model 3732 quad 4 × 28 reed

Schematic: Single 16 × 28 configura tion

The next figure is a simplified crosspoint schematic of the single 16 × 28 matrix configuration.

Figure 62: Single 16 × 28 simplified crosspoint schematic

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Quad 4 × 28

Dual 4 × 28 (2-pole)

Dual 8 × 28

Single 8 × 28 (2-pole)

Dual 4 × 56

Single 4 × 56 (2-pole)

11: Model 3732 quad 4 × 28 reed relay matrix card Series 3700A Switch and Control Cards

Model 3732 2-pole operation

There are three additional Model 3732 2-pole configurations available using Series 3700A software with the Model 3732 card:

• Dual 4 × 28 2-pole configuration (on page 11-35)

• Single 4 × 56 2-pole configuration (on page 11-39)

• Single 8 × 28 2-pole configuration (on page 11-43)

The Model 3732 uses single-pole relays and operates in single-pole mode by default. However, three Model 3732 configurations can operate in 2-pole mode (using Series 3700A software).

In 2-pole operation, one relay bank is used for the high signals, and the adjacent relay bank is used for the low signals. When the Model 3732 is configured for 2-pole operation, closing a channel on the first (high) bank causes the automatic closure of the corresponding channel on the second (low) bank (channel pairing).

When viewing the crosspoint matrix for your 2-pole co nf igurati on in the Series 3700A web interface on your computer, the low crosspoint in a channel pair will appear unavailable (gray). If you attempt to click on the low crosspoint, you will receive an error message stating the channel is not active.

To set up the Model 3732 card for 2-pole operation, you first configure the card’s hardware for the appropriate 1-pole operation, and then enable 2-pole operation using the Series 3700A software. shows the necessary base hardware configuration (1-pole) to accomplish each 2-pole configuration using the Series 3700A software.

Base 1-pole hardware settings for 2-pole configurations

Model 3732 1-pole configuration Model 3732 2-pole conf iguration

using Series 3700A software

Configure the Model 3732 hardware for the appropriate 1-pole operation by setting the ID jumpers on the screw terminal assembly or direct wiring the ID bit connections (if you are not using a screw terminal assembly).

Once the hardware is configured, use the Series 3700A’s software to select 2-pole operation (using the channel.setpole command). Refer to the "Close/Open Overview" section of the Series 3700A Reference Manual for detailed information about configuring channels for 2-pol e operat io n.

Two-pole operation can be specified on some channels and not others, but it is more common to operate the entire card in 2-pole mode. The schematics, connection diagrams, and connection logs in the following sections assume the entire card is set to 2-pole operation.

Two-pole configurations

The three available 2-pole configurations are described in the following sections.

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Switch and Control Cards Reference Manual Section 11:

Dual 4 × 28 2-pole configuration

The dual 4 × 28 2-pole configuration allows you to automatically link four contact sets to act as two pairs. Using the internal relays, you can create a matrix consisting of two banks of paired crosspoints, each with four rows and up to 28 columns. Using the Model 3732-ST-C screw terminal assembly is optional in this configuration.

Refer to the Screw terminal assemblies (on page 11-7) and Direct wiring (on page 11-10) topics for more information about jumper settings.

D-sub connections: Dual 4 × 28 2-pole configuration

The next figure shows the D-sub pin assignments for the dual 4 × 28 2-pole configuration.

Figure 63: Dual 4 × 28 2-pole D-sub pin connections

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11: Model 3732 quad 4 × 28 reed relay matrix card Series 3700A Switch and Control Cards

Pin assignments and signal naming: Dual 4 × 28 2-pole configuration

The next tables show the pin signal name for each pin on each of the D-sub connectors, and list the location of the connection in the switch matrix.

J3 D-sub connector pin assignments for the dual 4 × 28 2-pole configuration:

Figure 64: Model 3732 J3 D-sub connector pin assignments dual 4 × 28

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Model 3732 quad 4 × 28 reed relay matrix card

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J4 D-sub connector pin assignments for the dual 4 × 28 2-pole configuration:

Figure 65: Model 3732 J4 D-sub connector pin assignments dual 4 × 28

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11: Model 3732 quad 4 × 28 reed relay matrix card Series 3700A Switch and Control Cards

Schematic: Dual 4 × 28 2-pole configuration

The next table is a simplified crosspoint schematic of the dual 4 × 28 2-pole matrix configuration.

When viewing the crosspoint matrix for your 2-pole configuration in the Series 3700A web interface on your computer, the low crosspoint in a channel pair will appear unavailable (gray). If you attempt to click on the low crosspoint, you will receive an error message stating the channel is not active.

Figure 66: Dual 4 × 28 2-pole simplified crosspoint schematic

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Model 3732 quad 4 × 28 reed relay matrix card

Switch and Control Cards Reference Manual Section 11:

Single 4 × 56 2-pole configuration

The single 4 × 56 2-pole configuration allows you to automatically link two contact sets to act as one pair. Using either direct cabling or the Model 3732-ST-C screw terminal assembly, you can create a matrix consisting of one bank of paired crosspoints with four rows and up to 56 columns.

Refer to Screw terminal assemblies (on page 11-7) and Direc t w ir i ng (on page 11-10) for more information about jumper settings.

D-sub connections: Single 4 × 56 2-pole configuration

The next figure shows the D-sub pin assignments for the single 4 × 56 2-pole configuration.

Figure 67: Single 4 × 56 2-pole D-sub pin connections

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11: Model 3732 quad 4 × 28 reed relay matrix card Series 3700A Switch and Control Cards

Pin assignments and signal naming: Sin g le 4 × 56 2-pole configuration

The next tables show the pin signal name for each pin on each of the D-sub connectors, and list the location of the connection in the switch matrix.

J3 D-sub connector pin assignments for the single 4 × 56 2-pole configuration:

Figure 68: Model 3732 J3 D-sub connector pin assignments single 4 × 56

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Model 3732 quad 4 × 28 reed relay matrix card

Switch and Control Cards Reference Manual Section 11:

J4 D-sub connector pin assignments for the single 4 × 56 2-pole configuration:

Figure 69: Model 3732 J4 D-sub connector pin assignments single 4 × 56

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Schematic: Single 4 × 56 2-pole configuration

The next figure is a simplified crosspoint schematic of the single 4 × 56 2-pole matrix configuration.

Section

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11: Model 3732 quad 4 × 28 reed relay matrix card Series 3700A Switch and Control Cards

Figure 70: Single 4 × 56 simplifi ed crosspoint schematic

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Model 3732 quad 4 × 28 reed relay matrix card

Switch and Control Cards Reference Manual Section 11:

Single 8 × 28 2-pole configuration

The single 8 × 28 2-pole configuration allows you to automatically link two contact sets to act as one pair. Using the Model 3732-ST-R screw terminal assembly, you can create a matrix consisting of one bank of paired crosspoints with eight rows and up to 28 columns.

To create this configuration, you must use the Model 3732-ST-R screw terminal assembly. Refer to the Screw terminal assemblies (on page 11-7) topic for more information about jumper settings.

D-sub connections: Single 8 × 28 2-pole configuration

The next figure shows the D-sub pin assignments for the single 8 × 28 2-pole configuration.

Figure 71: Model 3732 single 8 × 28 D-sub conn (2-pole)

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Tektronix Series 3700A Switch,Control Cards Reference manual

Specifications and Main Features

Frequently Asked Questions

User Manual

Safety precaut ions

Table of Contents

Contact information

Introduction

Safety precautions for conn ect i ons

Series 3700A documentation

Available cards

Series 3700A cards general operation

Card installation

Verifying card installation

Connection safety

Pseudocards

Installed pseudocards

Series 3700A cards power usage

Maximum power usage with Series 3700A cards

Power budgeting and calculation

Power budgeting examples

Example 1

Example 2

Example 3

Example 4

Example 5

Example 6

Example 7

Hardware interlocks

Engaging hardware inter locks

Interlock status

Interlock pin numbers

Model 3720 mult iplexer card

Model 3720 dual 1 × 30 multiplexer card

Introduction to the Model 3 720 dua l 1 × 30 mul ti plexer card

Available accessories: Model 3720

Connection information: M ode l 37 20

Schematics: Model 3720

Model dual 1 × 20 multiplexer card

Introduction to the Model 3 721 dua l 1 × 20 mul ti plexer card

Model 3721 mult iplexer card

Available accessories: Model 3721

Model 3721-ST accessory board channel list

Connection information: Model 3721

Schematics: Model 3721

Amps channel fuse replacement procedure

Model 3721: AMPS channels fuse replacement

Model 3722 high-density multiplexer card

Model 3722 dual 1 × 48 high-density multiplexer card

Introduction to the Model 3722 c ar d

Available accessories: Model 3722

Connection information: M ode l 37 22

Schematics: Model 3722

Model 3723 high-speed reed relay multip lexer card

Model 3723 dual 1 × 30 high-speed multiplexer card

Introduction to the Model 3 723 car d

Available accessories: Model 3723

Connection information: M ode l 37 23

Schematics: Model 3723

Model 3724 FET multiplexer card

Model 3724 dual 1 × 30 FET multiplexer card

Introduction to the Model 3724 card

Available accessories: Model 3724

Connection information: M ode l 37 24

Schematics: Model 3724

Model 3730 high-density matrix card

Model 3730 6 × 16 high-density matrix card

Introduction to the Model 3 730 c ar d

Available accessories: Model 3730

Connection information: M ode l 37 30

Schematics: Model 3730

Model 3731 high-speed reed relay matrix card

Model 3731 6 × 16 high-speed reed matrix card

Introduction to the Model 3731 card

Available accessories: Model 3731

Connection informati on: M ode l 3 7 31

Schematics: Model 3731

Model 3732 quad 4 × 28 r eed relay matrix card

Introduction

Additional features