Keithley 7703, 7702, 7700 User Manual

Model 7700, 7702, and 7703 Multiplexer Modules

User’s Guide

PA-695 Rev. C / 8-03

A GREATER MEASURE OF CONFIDENCE

WARRANTY

Keithley Instruments, Inc. warrants this product to be free from defects in material and workmanship for a period of 1 year
from date of shipment.

Keithley Instruments, Inc. warrants the following items for 90 days from the date of shipment: probes, cables, rechargeable
batteries, diskettes, and documentation.

During the warranty period, we will, at our option, either repair or replace any product that proves to be defective.

To exercise this warranty, write or call your local Keithley representative, or contact Keithley headquarters in Cleveland, Ohio.
You will be given prompt assistance and return instructions. Send the product, transportation prepaid, to the indicated service
facility. Repairs will be made and the product returned, transportation prepaid. Repaired or replaced products are warranted for
the balance of the original warranty period, or at least 90 days.

LIMITATION OF WARRANTY

This warranty does not apply to defects resulting from product modification without Keithley’s express written consent, or
misuse of any product or part. This warranty also does not apply to fuses, software, non-rechargeable batteries, damage from
battery leakage, or problems arising from normal wear or failure to follow instructions.

THIS WARRANTY IS IN LIEU OF ALL OTHER WARRANTIES, EXPRESSED OR IMPLIED, INCLUDING ANY
IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR USE. THE REMEDIES PRO­VIDED HEREIN ARE BUYER’S SOLE AND EXCLUSIVE REMEDIES.

NEITHER KEITHLEY INSTRUMENTS, INC. NOR ANY OF ITS EMPLOYEES SHALL BE LIABLE FOR ANY DIRECT,
INDIRECT, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OF ITS
INSTRUMENTS AND SOFTWARE EVEN IF KEITHLEY INSTRUMENTS, INC., HAS BEEN ADVISED IN ADVANCE
OF THE POSSIBILITY OF SUCH DAMAGES. SUCH EXCLUDED DAMAGES SHALL INCLUDE, BUT ARE NOT LIM­ITED TO: COSTS OF REMOVAL AND INSTALLATION, LOSSES SUSTAINED AS THE RESULT OF INJURY TO ANY
PERSON, OR DAMAGE TO PROPERTY.

Keithley Instruments, Inc.

Sales Offices: BELGIUM:

CHINA:

Yuan Chen Xin Building, Room 705 • 12 Yumin Road, Dewai, Madian • Beijing 100029 • 8610-82251886 • Fax: [phone]

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SWEDEN:
TAIWAN:

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Viale San Gimignano, 38 • 20146 Milano • 02-48 39 16 01 • Fax: [phone]

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1-888-KEITHLEY (534-8453) • www.keithley.com

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Unit 2 Commerce Park, Brunel Road • Theale, Berkshire RG7 4AB • 0118 -929 75 00 • Fax: [phone]

Postbus 559 • 4200 AN Gorinchem • 0183-63 53 33 • Fax: [phone]

5/03

Safety Precautions

The following safety precautions should be observed before using
this product and any associated instrumentation. Although some in­struments and accessories would normally be used with non-haz­ardous 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 manual for complete product specifications.

If the product is used in a manner not specified, the protection pro­vided by the product may be impaired.

The types of product users are:

Responsible body

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

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

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

Service personnel

safe installations and repairs of products. Only properly trained ser­vice personnel may perform installation and service procedures.

Keithley products are designed for use with electrical signals that
are rated Measurement Category I and Measurement Category II, as
described in the International Electrotechnical Commission (IEC)
Standard IEC 60664. Most measurement, control, and data I/O sig­nals are Measurement Category I and must not be directly connect­ed to mains voltage or to voltage sources with high transient over­voltages. Measurement Category II connections require protection
for high transient over-voltages often associated with local AC
mains connections. Assume all measurement, control, and data I/O
connections are for connection to Category I sources unless other­wise marked or described in the Manual.

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 30V RMS, 42.4V
peak, or 60VDC are present.

that hazardous voltage is present in any unknown circuit before
measuring.

is the individual or group responsible for the use

use the product for its intended function. They must be

perform routine procedures on the product

are trained to work on live circuits, and perform

A good safety practice is to expect

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 volts,

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, make sure 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.

The instrument and accessories must be used in accordance with its
specifications and operating instructions or the safety of the equip­ment may be impaired.

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

When fuses are used in a product, replace with same type and rating
for continued protection against fire hazard.

Chassis connections must only be used as shield connections for
measuring circuits, NOT as safety earth 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.

no conductive part of

5/03

If a screw is present, connect it to safety earth ground using the
wire recommended in the user documentation.

!

The symbol on an instrument indicates that the user should re­fer to the operating instructions located in the manual.

The symbol on an instrument shows that it can source or mea­sure 1000 volts or more, including the combined effect of normal
and common mode voltages. Use standard safety precautions to
avoid personal contact with these voltages.

The symbol indicates a connection terminal to the equipment
frame.

The

WARNING

result in personal injury or death. Always read the associated infor­mation very carefully before performing the indicated procedure.

The

CAUTION

damage the instrument. Such damage 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.

heading in a manual explains dangers that might

heading in a manual explains hazards that could

To maintain protection from electric shock and fire, replacement
components in mains circuits, including 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. 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.

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., 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
cleaning/servicing.

7700 20-Channel Differential Multiplexer w/Automatic CJC

GENERAL

20 CHANNELS: 20 channels of 2-pole relay input. All channels config-

urable to 4-pole.

2 CHANNELS: 2 channels of current only input.
RELAY TYPE: Latching electromechanical.
ACTUATION TIME: <3ms.

CAPABILITIES

CHANNELS 1-20: Multiplex one of 20 2-pole or one of 10 4-pole signals

into DMM.

CHANNELS 21-22: Multiplex one of 2 2-pole current signals into DMM.

INPUTS

MAXIMUM SIGNAL LEVEL:

Channels (1-20): 300V DC or 300V rms (42.5V peak) for AC waveforms,

1A switched, 60W, 125VA maximum.

Channels (21-22): 60V DC or 30V rms, 3A switched, 60W, 125VA maxi-

mum.

CONTACT LIFE (typ): >10

CONTACT RESISTANCE: <1Ω at end of contact life.
CONTACT POTENTIAL: <±500nV typical per contact, 1µV max.

OFFSET CURRENT: <100pA.
CONNECTOR TYPE: Screw terminal, #20 AWG wire size.
ISOLATION BETWEEN ANY TWO TERMINALS: >10
ISOLATION BETWEEN ANY TERMINAL AND EARTH: >10
CROSS TALK (50Ω Load):

10MHz: <–40dB <-40dB
25MHz: ** <-25dB

* Channels 24 and 25 are open. Refer to ROUTe:MULTiple command

in 27xx User’s manual.

** Not valid

INSERTION LOSS (50Ω Source, 50Ω Load):

<0.1dB 1MHz 1MHz
<3db 2MHz 50MHz

* Channels 24 and 25 are open. Refer to ROUTe:MULTiple command

in 27xx User’s manual.

COMMON MODE VOLTAGE: 300V or 300V rms (42.5V peak) for AC wave-

forms between any terminal and chassis.

T/C COLD JUNCTION: 1.0°C (18°–28°C Mainframe Temp)

5

operations at max signal level.

>108operations cold switching.

<±500nV typical per contact pair, 1µV max.

10

Ω, <100pF.

w/Internal DMM w/o Internal DMM*

w/Internal DMM w/o Internal DMM*

1.5°C (0°–18°C & 28°–50°C Mainframe Temp).

9

Ω, <200pF.

Card Input

Card Sense

Cold junction
Ref x3

Channel 1

(Channels 2–9)

Channel 10

Cold junction
Ref x3

Channel 11

(Channels 12–19)

Channel 20

Channel 21

Channel 22

AMPS

Card

LO

LO

LO

LO

LO

LO

LO

LO

LO

HI

HI

HI

HI

HI

HI

HI

HI

Channel 23

2-Pole (Open)

4-Pole (Closed)

(see Note)

3A

3A

Channel 25

(see Note)
Backplane

isolation

Channel 24

(see Note)

Backplane

isolation

NOTE Channels 23–25 in this schematic

refer to the designations used for
control and not actual available channels.

For more information, refer to the
ROUTe:MULTiple command section
in the Model 2700 User’s Manual.

Channels 24 and 25 can be individually
controlled using ROUTe:MULTiple if the
module is not to be connected to the
internal DMM.

AMPS

HI

Input

LO

HI

Sense

LO

To Model 27xx
Backplane

ENVIRONMENTAL:

OPERATING ENVIRONMENT: Specified for 0°C to 50°C.

STORAGE ENVIRONMENT: –25°C to 65°C.
WEIGHT: 0.45kg (1 lb).

Specified to 80% R.H. at 35°C.

HW 10/10/02

Rev. B

Rev. A

GENERAL

40 CHANNELS: 40 channels of 2-pole relay input.

All channels configurable to 4-pole.

2 CHANNELS: 2 channels of current only input.
RELAY TYPE: Latching electromechanical.
ACTUATION TIME: <3ms.

CAPABILITIES

CHANNELS 1-40: Multiplex one of 40 2-pole or one of 20 4-pole signals

into DMM.

CHANNELS 41-42: Multiplex one of 2 2-pole current signals into DMM.

INPUTS

MAXIMUM SIGNAL LEVEL:

Channels (1-40): 300V DC or rms, 1A switched, 60W, 125VA maximum.
Channels (41-42): 60V DC or 30V rms, 3A switched, 60W, 125VA maxi-

mum.

CONTACT LIFE (typ): >10

5

operations at max signal level.

>10

8

operations cold switching.

CONTACT RESISTANCE: <1Ω at end of contact life.
CONTACT POTENTIAL: <±500nV typical per contact, 1µV max.

<±500nV typical per contact pair, 1µV max.

OFFSET CURRENT: <100pA.
CONNECTOR TYPE: Screw terminal, #20 AWG wire size.
ISOLATION BETWEEN ANY TWO TERMINALS: >10

10

Ω, <100pF.

ISOLATION BETWEEN ANY TERMINAL AND EARTH: >10

9

Ω, <200pF.

CROSS TALK (10MHz, 50Ω Load): <–40dB.
INSERTION LOSS (50Ω Source, 50Ω Load): <0.1dB below 1MHz.

<3dB below 2MHz.

COMMON MODE VOLTAGE: 300V between any terminal and chassis.

ENVIRONMENTAL

OPERATING ENVIRONMENT: Specified for 0°C to 50°C.

Specified to 80% R.H. at 35°C.

STORAGE ENVIRONMENT: –25°C to 65°C.

WEIGHT: 0.5kg (1.1 lb).

Specifications subject to change without notice.

7702 40-Channel Differential Multiplexer

HI

Card Input

LO

HI

Card Sense

LO

HI

Channel 1

LO

(Channels 2–19)

HI

Channel 20

LO

HI

Channel 21

LO

(Channels 22–39)

HI

Channel 40

LO

HI

Channel 41

LO

HI

Channel 42

LO

Channel 43

2-Pole (Open)

4-Pole (Closed)

(see Note)

3A

3A

NOTE Channels 43–45 in this schematic

Channel 45

(see Note)
Backplane

isolation

Channel 44

(see Note)

Backplane

isolation

HI

Input

LO

HI

Sense

To Model 2700

LO

Backplane

AMPS

refer to the designations used for
control and not actual available channels.

For more information, refer to the
ROUTe:MULTiple command section
in the Model 2700 User’s Manual.

Channels 44 and 45 can be individually
controlled using ROUTe:MULTiple if the
module is not to be connected to the
internal DMM.

7703 32-Channel High Speed Differential Multiplexer

GENERAL

32 CHANNELS: 32 channels of 2-pole relay input.

RELAY TYPE: Reed.
ACTUATION TIME: <1ms.

All channels configurable to 4-pole.

CAPABILITIES

CHANNELS 1-32: Multiplex one of 32 2-pole or one of 16 4-pole signals

into DMM.

INPUTS

MAXIMUM SIGNAL LEVEL:

Channels (1-32): 300V DC or rms, 0.5A switched, 10W maximum.
Contact Life (typ): >5×10

4

operations at max signal level.

>108operations cold switching.

CONTACT RESISTANCE: <1Ω at end of contact life.
CONTACT POTENTIAL: <±3µV typical per contact, 6µV max.

<±3µV typical per contact pair, 6µV max.

OFFSET CURRENT: <100pA.
CONNECTOR TYPE: 50 pin D-sub × 2.
RELAY DRIVE CURRENT: 20mA per channel.
ISOLATION BETWEEN ANY TWO TERMINALS: >10
ISOLATION BETWEEN ANY TERMINAL AND EARTH: >10

9

Ω, <200pF.

9

Ω, <400pF.

CROSS TALK (1 MHz, 50Ω Load): <–40dB.
INSERTION LOSS (50ΩSource, 50Ω Load): <0.35dB below 1MHz.

<3dB below 2MHz.

COMMON MODE VOLTAGE: 300V between any terminal and chassis.

ENVIRONMENTAL

OPERATING ENVIRONMENT:Specified for 0°C to 50°C.

STORAGE ENVIRONMENT: –25°C to 65°C.
WEIGHT: 0.8kg (1.75 lbs).

Specified to 40% R.H. at 35°C.

HI

Card Input

LO

HI

Card Sense

LO

HI

Channel 1

LO

(Channels 2–15)

HI

Channel 16

LO

HI

Channel 17

LO

(Channels 18–31)

HI

Channel 32

LO

Channel 35
2-Pole (Closed)
4-Pole (Open)

(see Note)

Channel 33

(see Note)

Backplane
isolation

Channel 34

(see Note)

Backplane
isolation

NOTE Channels 33–35 in this schematic

refer to the designations used for
control and not actual available channels.

For more information, refer to the
ROUTE:MULT command section
in the Model 2700 User’s Manual.

HI

Input

LO

HI

Sense

LO

To Model 2700
Backplane