Tektronix MB Series Signal Conditioning Module Users Guide

MB Series

User’s Guide

A GREATER MEASURE OF CONFIDENCE

WARRANTY

Hardware

Keithley Instruments, Inc. warrants that, for a period of one (1) year from the date of shipment (3 years for Models 2000, 2001, 2002, 2010 and 2700), the
Keithley Hardware product will be free from defects in materials or workmanship. This warranty will be honored provided the defect has not been caused
by use of the Keithley Hardware not in accordance with the instructions for the product. This warranty shall be null and void upon: (1) any modification of
Keithley Hardware that is made by other than Keithley and not approved in writing by Keithley or (2) operation of the Keithley Hardware outside of the
environmental specifications therefore.

Upon receiving notification of a defect in the Keithley Hardware during the warranty period, Keithley will, at its option, either repair or replace such Keithley Hard­ware. During the first ninety days of the warranty period, Keithley will, at its option, supply the necessary on site labor to return the product to the condition prior to
the notification of a defect. Failure to notify Keithley of a defect during the warranty shall relieve Keithley of its obligations and liabilities under this warranty.

Other Hardware

The portion of the product that is not manufactured by Keithley (Other Hardware) shall not be covered by this warranty, and Keithley shall have no duty of
obligation to enforce any manufacturers' warranties on behalf of the customer. On those other manufacturers’ products that Keithley purchases for resale,
Keithley shall have no duty of obligation to enforce any manufacturers’ warranties on behalf of the customer.

Software

Keithley warrants that for a period of one (1) year from date of shipment, the Keithley produced portion of the software or firmware (Keithley Software) will
conform in all material respects with the published specifications provided such Keithley Software is used on the product for which it is intended and other­wise in accordance with the instructions therefore. Keithley does not warrant that operation of the Keithley Software will be uninterrupted or error-free and/
or that the Keithley Software will be adequate for the customer's intended application and/or use. This warranty shall be null and void upon any modification
of the Keithley Software that is made by other than Keithley and not approved in writing by Keithley.

If Keithley receives notification of a Keithley Software nonconformity that is covered by this warranty during the warranty period, Keithley will review the
conditions described in such notice. Such notice must state the published specification(s) to which the Keithley Software fails to conform and the manner
in which the Keithley Software fails to conform to such published specification(s) with sufficient specificity to permit Keithley to correct such nonconfor­mity. If Keithley determines that the Keithley Software does not conform with the published specifications, Keithley will, at its option, provide either the
programming services necessary to correct such nonconformity or develop a program change to bypass such nonconformity in the Keithley Software.
Failure to notify Keithley of a nonconformity during the warranty shall relieve Keithley of its obligations and liabilities under this warranty.

Other Software

OEM software that is not produced by Keithley (Other Software) shall not be covered by this warranty, and Keithley shall have no duty or obligation to
enforce any OEM's warranties on behalf of the customer.

Other Items

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

Items not Covered under Warranty

This warranty does not apply to fuses, non-rechargeable batteries, damage from battery leakage, or problems arising from normal wear or failure to follow
instructions.

Limitation of Warranty

This warranty does not apply to defects resulting from product modification made by Purchaser without Keithley's express written consent, or by misuse
of any product or part.

Disclaimer of Warranties

EXCEPT FOR THE EXPRESS WARRANTIES ABOVE KEITHLEY DISCLAIMS ALL OTHER WARRANTIES, EXPRESS OR IMPLIED, INCLUD­ING WITHOUT LIMITATION, ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. KEI­THLEY DISCLAIMS ALL WARRANTIES WITH RESPECT TO THE OTHER HARDWARE AND OTHER SOFTWARE.

Limitation of Liability

KEITHLEY INSTRUMENTS SHALL IN NO EVENT, REGARDLESS OF CAUSE, ASSUME RESPONSIBILITY FOR OR BE LIABLE FOR: (1)
ECONOMICAL, INCIDENTAL, CONSEQUENTIAL, INDIRECT, SPECIAL, PUNITIVE OR EXEMPLARY DAMAGES, WHETHER CLAIMED
UNDER CONTRACT, TORT OR ANY OTHER LEGAL THEORY, (2) LOSS OF OR DAMAGE TO THE CUSTOMER'S DATA OR PROGRAM­MING, OR (3) PENALTIES OR PENALTY CLAUSES OF ANY DESCRIPTION OR INDEMNIFICATION OF THE CUSTOMER OR OTHERS FOR
COSTS, DAMAGES, OR EXPENSES RELATED TO THE GOODS OR SERVICES PROVIDED UNDER THIS WARRANTY.

Keithley Instruments, Inc. 28775 Aurora Road • Cleveland, Ohio 44139 • 440-248-0400 • Fax: [phone]

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

Sales Offices:BELGIUM: Bergensesteenweg 709 • B-1600 Sint-Pieters-Leeuw • 02-363 00 40 • Fax: [phone]

CHINA: Yuan Chen Xin Building, Room 705 • 12 Yumin Road, Dewai, Madian • Beijing 100029 • 8610-6202-2886 • Fax: [phone]
FINLAND: Tietäjäntie 2 • 02130 Espoo • Phone: [phone] • Fax: [phone]
FRANCE: 3, allée des Garays • 91127 Palaiseau Cédex • 01-64 53 20 20 • Fax: [phone]
GERMANY: Landsberger Strasse 65 • 82110 Germering • 089/84 93 07-40 • Fax: [phone]
GREAT BRITAIN: Unit 2 Commerce Park, Brunel Road • Theale • Berkshire RG7 4AB • 0118 929 7500 • Fax: [phone]
INDIA: Flat 2B, Willocrissa • 14, Rest House Crescent • Bangalore 560 001 • 91-80-509-1320/21 • Fax: [phone]
ITALY: Viale San Gimignano, 38 • 20146 Milano • 02-48 39 16 01 • Fax: [phone]
JAPAN: New Pier Takeshiba North Tower 13F • 11-1, Kaigan 1-chome • Minato-ku, Tokyo 105-0022 • 81-3-5733-7555 • Fax: [phone]
KOREA: 2FL., URI Building • 2-14 Yangjae-Dong • Seocho-Gu, Seoul 137-888 • 82-2-574-7778 • Fax: [phone]
NETHERLANDS: Postbus 559 • 4200 AN Gorinchem • 0183-635333 • Fax: [phone]
SWEDEN: c/o Regus Business Centre • Frosundaviks Allé 15, 4tr • 169 70 Solna • 08-509 04 679 • Fax: [phone]
SWITZERLAND: Kriesbachstrasse 4 • 8600 Dübendorf • 01-821 94 44 • Fax: [phone]
TAIWAN: 1FL., 85 Po Ai Street • Hsinchu, Taiwan, R.O.C. • 886-3-572-9077• Fax: [phone]

4/02

MB Series

User’s Guide

Revision D - January 1996

Part Number: 60530

New Contact Information

Keithley Instruments, Inc.

28775 Aurora Road

Cleveland, OH 44139

Technical Support: 1-888-KEITHLEY

Monday – Friday 8:00 a.m. to 5:00 p.m (EST)

Fax: [phone]

Visit our website at http://www.keithley.com

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 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 manual. 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, and perform

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 Installation Category I and Installation Category II, as de­scribed in the International Electrotechnical Commission (IEC)
Standard IEC 60664. Most measurement, control, and data I/O sig­nals are Installation Category I and must not be directly connected
to mains voltage or to voltage sources with high transient over-volt­ages. Installation 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. 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 volts, 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, 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.

5/02

If or 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 WARNING heading in a manual 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 a manual explains hazards that could
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.

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.

The information contained in this manual is believed to be accurate and reliable. However, Keithley
Instruments, Inc., assumes no responsibility for its use or for any infringements or patents or other rights
of third parties that may result from its use. No license is granted by implication or otherwise under any
patent rights of Keithley Instruments, Inc.

KEITHLEY INSTRUMENTS, INC., SHALL NO T BE LIABLE FOR ANY SPECIAL, INCIDENTAL,
OR CONSEQUENTIAL DAMAGES RELATED TO THE USE OF THIS PRODUCT. THIS
PRODUCT IS NOT DESIGNED WITH COMPONENTS OF A LEVEL OF RELIABILITY
SUITABLE FOR USE IN LIFE SUPPORT OR CRITICAL APPLICATIONS.

Refer to your Keithley Instruments license agreement for specific warranty and liability information.

All brand and product names are trademarks or registered trademarks of their respective companies.

© Copyright Keithley Instruments, Inc., 1993, 1996.

All rights reserved. Reproduction or adaptation of any part of this documentation beyond that permitted
by Section 117 of the 1976 United States Copyright Act without permission of the Copyright owner is
unlawful.

Keithley MetraByte

440 Myles Standish Blvd. Taunton, MA 02780

FAX: [phone]

Telephone: [phone]

●

Table of Contents

Preface

Manual Organization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .xi

Repair and Return Policy. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .xi

Introduction

1

MB Series Modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-1

Performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-1

Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-2

Physical Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-2

Input Modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-4

Output Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-5

MBAF Series Active Low-Pass Filter Modules. . . . . . . . . . . . . .1-6

MB Series Backplanes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-8

Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-9

2

Setting Up an MB Series System

Installing the MB Series Backplane. . . . . . . . . . . . . . . . . . . . . . .2-2

Selecting a Site . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-2

Mounting the Backplane . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-2

Mounting: MB01, MB02, and MB05. . . . . . . . . . . . . . . . .2-2

Mounting: MB03 and MB04 . . . . . . . . . . . . . . . . . . . . . . .2-3

Mounting: STA-1360 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-3

Mounting: STA-MB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-3

Connecting Power. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-4

Power: MB01. MB02, and MB05 . . . . . . . . . . . . . . . . . . .2-5

Power: MB03, MB04, and STA-1360 . . . . . . . . . . . . . . . .2-6

Power: STA-MB. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-7

Using an Auxiliary Power Supply . . . . . . . . . . . . . . . . .2-7

Using DAS Board Power. . . . . . . . . . . . . . . . . . . . . . . .2-8

Grounding the Backplane (MB01, MB02, and MB05). . . . .2-10

Installing MB Series Modules in the Backplane . . . . . . . . . . . .2-11

Connecting Signals to the Backplane. . . . . . . . . . . . . . . . . . . . .2-12

Physical Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-12

Wiring Specific Modules. . . . . . . . . . . . . . . . . . . . . . . . . . . .2-13

Current Conversion Resistor. . . . . . . . . . . . . . . . . . . . . . . . .2-17

iii

Connecting Backplanes to Keithley MetraByte

Analog I/O Boards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-18

Configuring for Single-Ended Operation . . . . . . . . . . . . . . .2-18

Connecting MB01 and MB05 Backplanes . . . . . . . . . . . . . .2-18

Connecting the MB01/MB05 to the DAS4, DAS-8, and

DAS-800 Series. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-19

Connecting the MB01/MB05 to the DAS-16, DAS-1200,

DAS-1400, and DAS-1600 Series. . . . . . . . . . . . . . . . .2-20

Connecting the MB01/MB05 to the DAS-1800 Series . .2-21
Connecting the MB01/MB05 to the DASCard-1000

Series. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-22

Connecting the MB01/MB05 to the DAS-20. . . . . . . . . .2-23

Connecting MB02 Backplanes . . . . . . . . . . . . . . . . . . . . . . .2-24

Connecting the MB02 to the DAS4, DAS-8, and

DAS-800 Series. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-25

Connecting the MB02 to the DAS-16, DAS-1200,

DAS-1400, and DAS-1600 Series. . . . . . . . . . . . . . . . .2-27

Connecting the MB02 to the DAS-1800 Series. . . . . . . .2-29

Connecting the MB02 to the DAS-20 . . . . . . . . . . . . . . .2-31

Connecting MB03, MB04, and STA-1360 Backplanes . . . .2-35

Connecting STA-MB Backplanes . . . . . . . . . . . . . . . . . . . . .2-35

Wiring Module Inputs and Outputs to the DAS Board . .2-35

Setting STA-MB Single-Ended/Differential Switches. . .2-37

Cabling to the STA-MB . . . . . . . . . . . . . . . . . . . . . . . . . .2-37

MB Series Module Descriptions

3

MB30 and MB31 Millivolt and Voltage Input Modules . . . . . . .3-2

MB32 Current Input Module . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-7

MB34 RTD Input Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-11

MB36 Potentiometer Input Module. . . . . . . . . . . . . . . . . . . . . .3-16

MB37 Thermocouple Input Module . . . . . . . . . . . . . . . . . . . . .3-20

MB38 Strain Gauge Input Module. . . . . . . . . . . . . . . . . . . . . . .3-25

MB39 Current Output Module. . . . . . . . . . . . . . . . . . . . . . . . . .3-29

MB40 and MB41 Wide Bandwidth Millivolt/Volt Input

Modules. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-34

MB45 Frequency Input Module. . . . . . . . . . . . . . . . . . . . . . . . .3-39

MB47 Linearized Thermocouple Input Module . . . . . . . . . . . .3-43

MBAF Series Low-Pass Active Filter Modules. . . . . . . . . . . . .3-48

iv

v

MB Series Backplane Descriptions

4

MB01, MB02, and MB05 Backplanes. . . . . . . . . . . . . . . . . . . . .4-1

System Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-4

MB01 and MB05 System Connectors . . . . . . . . . . . . . . . .4-4

MB02 System Connector. . . . . . . . . . . . . . . . . . . . . . . . . .4-6

Grounding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-7

Power. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-8

Field Terminations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-8

Interchannel Bridge Jumpers (MB01 and MB05 Only) . . . . .4-9

Address Selection Jumpers (MB02 Only). . . . . . . . . . . . . . . .4-9

Mounting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-10

Dimensions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-10

RMT-MBBP Rack Enclosure. . . . . . . . . . . . . . . . . . . . . .4-12

Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-13

MB03 and MB04 Backplanes . . . . . . . . . . . . . . . . . . . . . . . . . .4-14

Grounding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-16

Power. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-16

Field Terminations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-16

Mounting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-16

Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-17

STA-1360 Evaluation Socket. . . . . . . . . . . . . . . . . . . . . . . . . . .4-18

Grounding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-19

Power. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-19

Field Terminations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-19

Cold Junction Compensation . . . . . . . . . . . . . . . . . . . . . . . .4-20

Mounting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-21

STA-MB Backplane . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-21

Power. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-23

Mounting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-23

Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-23

Index

List of Figures

Figure 1-1. MB Series Module Outline and Pinout. . . . . . . . .1-3

Figure 1-2. Block Diagram of a General Measurement and

Control Application. . . . . . . . . . . . . . . . . . . . . . . .1-9

Figure 2-1. Mounting the Backplane in the Rack-Mount

Enclosure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-3

Figure 2-2. Power Terminal Block Locations: MB01, MB02,

and MB05 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-5

Figure 2-3. Wiring the Power Supply to the Backplane . . . . .2-6

Figure 2-4. Power Terminal Block Locations: MB03,

MB04, STA-1360 . . . . . . . . . . . . . . . . . . . . . . . . .2-6

Figure 2-5. Power Terminal Block Location: STA-MB . . . . .2-7

Figure 2-6. Wiring Power to the STA-MB from a

DAS-1600 Series Board . . . . . . . . . . . . . . . . . . . .2-9

Figure 2-7. Ground Stud Locations . . . . . . . . . . . . . . . . . . . .2-10

Figure 2-8. Mounting an MB Series Module. . . . . . . . . . . . .2-11

Figure 2-9. Connecting Signal Wires. . . . . . . . . . . . . . . . . . .2-12

Figure 2-10. Installing the Current Conversion Resistor

(MB01, MB02, MB03, MB05, STA-1360,

STA-MB) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-17

Figure 2-11. Typical MB01 or MB05 Application . . . . . . . . .2-18

Figure 2-12. Location of Pin 1 on MB01 or MB05

Connectors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-19

Figure 2-13. Connecting the DAS-4, DAS-8, or DAS-800

Series to the MB01/MB05 . . . . . . . . . . . . . . . . .2-20

Figure 2-14. Connecting the DAS-16, DAS-1200, DAS-1400,

or DAS-1600 Series to the MB01/MB05 . . . . . .2-20

Figure 2-15. Connecting the DAS-1800ST/HR/AO Series

to the MB01/MB05 using an STA-1800U . . . . .2-21

Figure 2-16. Connecting the DAS-1800HC Series to the

MB01/MB05 using the STA-1800HC or

CONN-1800HC. . . . . . . . . . . . . . . . . . . . . . . . . .2-22

Figure 2-17. Connecting the DASCard-1000 Series to the

MB01/MB05 using an STA-U . . . . . . . . . . . . . .2-23

Figure 2-18. Connecting the DAS-20 to the MB01/MB05 . . .2-23

Figure 2-19. Typical MB02 Application . . . . . . . . . . . . . . . . .2-24

Figure 2-20. Location of Pin 1 on the MB02 Connector. . . . .2-25

Figure 2-21. Connecting the DAS-4, DAS-8, or DAS-800

Series to the MB02 . . . . . . . . . . . . . . . . . . . . . . .2-26

Figure 2-22. Connecting the DAS-4, DAS-8, or DAS-800

Series to the MB02 using the STA-SCM8 . . . . .2-26

Figure 2-23. Connecting the DAS-16 or DAS-1200/1400/

1600 Series to the MB02. . . . . . . . . . . . . . . . . . .2-28

Figure 2-24. Connecting the DAS-16 or DAS-1200/1400/

1600 Series to the MB02 using the

STA-SCM16 . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-28

Figure 2-25. Connecting the DAS-1800ST/HR/AO Series

to the MB02 using an STA-1800U . . . . . . . . . . .2-29

Figure 2-26. Daisy-Chaining STA-1800U Accessories

with MB02 Backplanes. . . . . . . . . . . . . . . . . . . .2-30

vi

Figure 2-27. Connecting the DAS-20 to the MB02. . . . . . . . .2-31

Figure 2-28. MB02 Address Jumper Locations. . . . . . . . . . . .2-32

Figure 2-29. MB02 Address Jumper Example . . . . . . . . . . . .2-34

Figure 2-30. STA-MB/DAS-1600 Series Wiring Example. . .2-36
Figure 2-31. STA-MB Single-Ended/Differential Switches . .2-37
Figure 2-32. Connecting the DAS-800 Series to the

STA-MB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-38

Figure 2-33. Connecting the DAS-8 to the STA-MB

using an EXP-16 . . . . . . . . . . . . . . . . . . . . . . . . .2-38

Figure 2-34. Connecting the DAS-800 Series to the

STA-MB using an EXP-800 . . . . . . . . . . . . . . . .2-38

Figure 2-35. Connecting the DAS-1200/1400/1600 or

DASCard-1000 Series to the STA-MB using

an EXP-1600. . . . . . . . . . . . . . . . . . . . . . . . . . . .2-39

Figure 3-1. MB30 and MB31 Functional Block Diagram. . . .3-3

Figure 3-2. MB32 Functional Block Diagram. . . . . . . . . . . . .3-8

Figure 3-3. MB34 Functional Block Diagram. . . . . . . . . . . .3-12

Figure 3-4. MB36 Functional Block Diagram. . . . . . . . . . . .3-17

Figure 3-5. MB37 Functional Block Diagram. . . . . . . . . . . .3-22

Figure 3-6. MB38 Functional Block Diagram. . . . . . . . . . . .3-26

Figure 3-7. MB39 Functional Block Diagram. . . . . . . . . . . .3-31

Figure 3-8. MB40 and MB41 Functional Block Diagram. . .3-35

Figure 3-9. MB45 Functional Block Diagram. . . . . . . . . . . .3-40

Figure 3-10. MB47 Functional Block Diagram. . . . . . . . . . . .3-45

Figure 3-11. 9-Pole Low-Pass Theoretical Frequency

Response Curves. . . . . . . . . . . . . . . . . . . . . . . . .3-51

Figure 3-12. 9-Pole Low-Pass Theoretical Delay Curves . . . .3-52

Figure 3-13. 9-Pole Low-Pass Theoretical Step Response

Curves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-53

Figure 4-1. MB01 Backplane Diagram . . . . . . . . . . . . . . . . . .4-2

Figure 4-2. MB02 Backplane Diagram . . . . . . . . . . . . . . . . . .4-3

Figure 4-3. MB05 Backplane Diagram . . . . . . . . . . . . . . . . . .4-4

Figure 4-4. MB01/MB05 System Connector Pinout

(P1 and P2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-5

Figure 4-5. MB02 System Connector Pinout (P1). . . . . . . . . .4-6

Figure 4-6. Address Selection Pins Showing Default

Jumpers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-10

Figure 4-7. MB01 and MB02 Backplane Mounting

Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-11

Figure 4-8. MB05 Backplane Mounting Dimensions . . . . . .4-11

Figure 4-9. RMT-MBBP Rack Mount Diagram . . . . . . . . . .4-12

Figure 4-10. RMT-MBBP Rack Mount Assembly Drawing. .4-13

vii

Figure 4-11. MB03 Wiring Diagram . . . . . . . . . . . . . . . . . . . .4-14

Figure 4-12. MB04 Wiring Diagram . . . . . . . . . . . . . . . . . . . .4-15

Figure 4-13. STA-1360 Backplane Diagram. . . . . . . . . . . . . .4-18

Figure 4-14. STA-MB Backplane Diagram. . . . . . . . . . . . . . .4-22

Figure 4-15. STA-MB/DAS-1600 Series Wiring Example. . .4-24

List of Tables

Table 1-1. MB Series Input Modules . . . . . . . . . . . . . . . . . . .1-5

Table 1-2. MBAF Series Module Pinout . . . . . . . . . . . . . . . .1-7

Table 1-3. MB Series Backplanes. . . . . . . . . . . . . . . . . . . . . .1-8

Table 2-1. MB Series Module Power Requirements. . . . . . . .2-4

Table 2-2. MB Series Input Module Wiring Diagrams:

MB01, MB02, MB03, MB04, MB05,

STA-1360. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-13

Table 2-3. MB Series Input Module Wiring Diagrams:

STA-MB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-15

Table 2-4. MB Series Output Module Wiring Diagram:

MB01, MB02, MB03, MB04, MB05,

STA-1360. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-16

Table 2-5. MB Series Output Module Wiring Diagram:

STA-MB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-17

Table 2-6. MB02 Address Selection Jumpers. . . . . . . . . . . .2-33

Table 3-1. MB30 and MB31 Specifications . . . . . . . . . . . . . .3-4

Table 3-2. MB30 and MB31 Ordering Information . . . . . . . .3-6

Table 3-3. MB32 Specifications . . . . . . . . . . . . . . . . . . . . . . .3-9

Table 3-4. MB32 Ordering Information . . . . . . . . . . . . . . . .3-10

Table 3-5. MB34 Specifications . . . . . . . . . . . . . . . . . . . . . .3-13

Table 3-6. MB34 Ordering Information . . . . . . . . . . . . . . . .3-15

Table 3-7. MB36 Specifications . . . . . . . . . . . . . . . . . . . . . .3-18

Table 3-8. MB36 Ordering Information . . . . . . . . . . . . . . . .3-20

Table 3-9. MB37 Specifications . . . . . . . . . . . . . . . . . . . . . .3-23

Table 3-10. MB37 Ordering Information . . . . . . . . . . . . . . . .3-25

Table 3-11. MB38 Specifications . . . . . . . . . . . . . . . . . . . . . .3-27

Table 3-12. MB38 Ordering Information . . . . . . . . . . . . . . . .3-29

Table 3-13. MB39 Specifications . . . . . . . . . . . . . . . . . . . . . .3-32

Table 3-14. MB39 Ordering Information . . . . . . . . . . . . . . . .3-33

Table 3-15. MB40 and MB41 Specifications . . . . . . . . . . . . .3-36

Table 3-16. MB40 and MB41 Ordering Information . . . . . . .3-38

Table 3-17. MB45 Specifications . . . . . . . . . . . . . . . . . . . . . .3-41

Table 3-18. MB45 Ordering Information . . . . . . . . . . . . . . . .3-43

Table 3-19. MB47 Specifications . . . . . . . . . . . . . . . . . . . . . .3-46

Table 3-20. MB47 Ordering Information . . . . . . . . . . . . . . . .3-48

viii

Table 3-21. MBAF Series Module Specifications . . . . . . . . .3-49

Table 3-22. MBAF-LPBU Butterworth (9-Pole) Low-Pass

Theoretical Response Data . . . . . . . . . . . . . . . . .3-54

Table 3-23. MBAF-LPBU Bessel (9-Pole) Low-Pass

Theoretical Response Data . . . . . . . . . . . . . . . . .3-55

Table 3-24. MBAF Series Model Numbers . . . . . . . . . . . . . .3-56

Table 4-1. MB02 Address Selection Jumpers. . . . . . . . . . . .4-10

Table 4-2. MB01, MB02, and MB05 Backplane

Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . .4-13

Table 4-3. MB03 and MB04 Mounting Parts . . . . . . . . . . . .4-17

Table 4-4. MB03 and MB04 Mounting Parts for Two

or More Backplanes. . . . . . . . . . . . . . . . . . . . . . .4-17

Table 4-5. MB03 and MB04 Specifications . . . . . . . . . . . . .4-17

Table 4-6. STA-1360 Mounting Parts. . . . . . . . . . . . . . . . . .4-21

ix

Preface

This manual serves both designers of systems and users of Keithley
MetraByte MB Series signal conditioning modules, backplanes, and
accessories. It provides specifications, ordering information, and
installation and application instructions.

Manual Organization

This manual is organized as follows:

●

Chapter 1 - Introduction provides an overview of MB Series

modules (including MBAF Series modules), MB Series backplanes,
and applications.

●

Chapter 2 - Setting up an MB Series System tells how to install an

MB Series backplane in an equipment rack, install MB Series
modules in the backplane, wire signals to the modules, and connect
Keithley MetraByte analog boards to the backplane.

Chapter 3 - MB Series Module Descriptions provides detailed

●

descriptions and specifications for each of the MB Series modules.

●

Chapter 4 - MB Series Backplane Descriptions provides detailed

descriptions and specifications for each of the MB Series backplanes.

Repair and Return Policy

If you have a problem with this product or its accessories, determine your
original invoice number and purchase date and prepare a brief description
of the problem. For technical support, call [phone] between 8:00
AM and 6:00 PM EST, Monday through Friday.

xi

If an Applications Engineer determines that the product must be returned
for repair, you will be gi ven an RMA number and additional instructions.
To return the product, do the following:

1. Pack the product in its original packing materials or suitable
replacements. Include a piece of paper with the following
information:

– your name, address, and telephone number
– original invoice number and purchase date
– brief description of the problem
– RMA number

2. Write the RMA # on the outside of the package.

3. Ship to:

Keithley MetraByte
440 Myles Standish Blvd.
Taunton, MA 02780
ATTN: RMA (your RMA number)

xii

1

Introduction

This chapter describes general features and applications of MB Series
signal conditioning modules and backplanes. It includes the following
sections:

●

MB Series modules
MBAF Series active low-pass filter modules

●

MB Series backplanes

●

●

Applications

MB Series Modules

This section describes characteristics that apply to all MB Series
modules.

Performance

The MB Series provides excellent signal-conditioning performance. Each
unit is laser-trimmed for high calibrated accuracy. Typical calibrated
accuracy consists of ±0.05% span ±10 µV RTI ±0.05 V
Reference to Input; V
Refer to the specific module description in this chapter for more detailed
information.

(RTI stands for

z

is the input voltage that results in a 0 V output).

z

MB Series Modules 1-1

Protection

Chopper-stabilized amplification provides low drift and outstanding long
term stability without the need for potentiometer adjustments. 1500 V

rms

transformer isolation for the signal and power sections eliminates ground
loops, guards against transients, prevents common mode voltage
problems, and ensures channel-to-channel isolation. 160 dB CMR
(Common Mode Rejection), 90 dB NMR (Normal Mode Rejection), and
RFI/EMI immunity maintain signal integrity.

All field-wired terminations, including sensor inputs, excitation circuitry,
and current outputs, are protected against the inadvertent application of
240 V

line voltage. The MB Series modules meet the IEEE standard

rms

for transient voltage protection (IEEE-STD 472 (SWC)).

Physical Characteristics

All MB Series modules are identical in pinout and size as shown in Figure
1-1. Therefore, you can mix and match them on a backplane to address
your exact needs. The modules are hard-potted, typically weigh 2.25
ounces (64 grams), and have sturdy 40-mil gold plated pins. The module
cases are made from a thermoplastic resin that has a fire retardant rating
of 94 V-O and is designed for use from –55°C to +85°C. The modules are
secured in the backplane by a tapered screw that also serves as a guide for
insertion.

For ready identification, the isolated input modules are labeled with white
lettering on a black background and the isolated output modules are
labeled with white letters on a red background.

1-2 Introduction

0.345

0.0750

(8.8)

(1.8)

typ

2.250

(57.2)

0.590
(15.0)

0.150
(3.8)

0.375 (9.2)

0.525 (12.9)

0.375
(9.5)

1.175

(29.8)

1.650
(41.9)

dimensions in inches and (mm)

2.250
(57.2)

0.245 (6.2)

0.145 (3.7)

0.095 (2.4)

WRITE EN (0) 23

0.475 (11.6)

RESERVED 21

I/O COM 19

+5 V 17

IN LO 5

- EXC 3

SENSOR - 1

0.275 (6.7)

0.375 (9.5)

socket

for 0.038

pin

PINOUT

1

TOP

READ EN (0) 22
Vout20
Vin18
POWER COM16

IN HI6
+ EXC4
SENSOR +2

insert

for 3mm

screw

2

0.590
(15.0)

2.250
(57.2)

Figure 1-1. MB Series Module Outline and Pinout

MB Series Modules 1-3

Input Modules

MB Series input modules offer the following features:

Signal source inputs:

●

– Sensors: thermocouples, RTDs, potentiometers, and strain gauges
– Millivolt and voltage sources
– 4-20 mA or 0-20 mA process current inputs
– frequency inputs
Mix-and-match input capability

●

●

High-level voltage output: –5 V to +5 V or 0 to +5 V

●

High accuracy: ±0.05%
Low drift: ±1 µV/°C

●

●

Reliable transformer isolation: 1500 V

CMV (Common Mode

rms

Voltage), 160 dB CMR, meets IEEE-STD 472: Transient Protection
(SWC)

●

Input protection: 240 V

●

Factory-ranged and trimmed

continuous

rms

The MB Series input modules are galvanically isolated, single channel,
plug-in signal conditioners that provide input protection, amplification
and filtering, as well as a high level, series-switched analog output that
can eliminate the need for external multiplexers. Key specifications
include: 1500 V

isolation, calibrated accuracy of ±0.05%, ±0.02% span

rms

nonlinearity, and low drift of ±1 µV/°C.

MB Series input modules are selected to meet the requirements of each
application. The transfer function provided by each module is as follows:

Input: specified sensor measurement range

●

Output: 0 to +5 V or –5 V to +5 V

●

Input modules are available to accept millivolt, volt, process current,
thermocouple, RTD, potentiometer, frequency, and strain gauge inputs.
Each module is available in a number of standard ranges to meet most
applications.

1-4 Introduction

Table 1-1 lists the available MB Series input modules.

Table 1-1. MB Series Input Modules

Module Function Output

MB30 Isolated mV Input 0 to +5 V or –5 V to +5 V
MB31 Isolated V Input 0 to +5 V or –5 V to +5 V
MB32 Isolated Current Input 0 to +5 V
MB34

Isolated 2, 3 or 4 Wire

100 Ω Pt, 10 Ω Cu, or 120 Ω Ni
MB36 Isolated Potentiometer Input 0 to +5 V
MB37 Isolated Thermocouple Input –

Type J, K, T, E, R, S, or B
MB38 Isolated Strain Gauge Input –

Full Bridge and Half Bridge
MB40 Isolated Wide Bandwidth mV Input 0 to +5 V or –5 V to +5 V
MB41 Isolated Wide Bandwidth V Input 0 to +5 V or –5 V to +5 V

1

RTD Input –

0 to +5 V

0 to +5 V

–5 V to +5 V

MB45 Isolated Frequency Input 0 to +5 V
MB47 Isolated Linearized Thermocouple Input –

0 to +5 V

Type J, K, T, E, R, S, or B

Notes

1

The MB34 RTD input module pro vides 3-wire lead resistance compensation and can be connected to

2, 3, or 4 wire RTDs.

For a more detailed description of the MB Series input modules, refer to
Chapter 3

.

Output Module

The MB Series output module (MB39) offers the following features:

High-level voltage inputs: 0 to +5 V or –5 V to +5 V

●

Process current output: 4-20 mA or 0-20 mA

●

●

High accuracy: ±0.05%

MB Series Modules 1-5

Reliable transformer isolation: 1500 V

●

Meets IEEE-STD 472: Transient Protection (SWC)

●

●

Output protection: 240 V
Internal track and hold amplifier

●

continuous

rms

CMV, CMR = 90 dB

rms

The MB39 current output module accepts a high level analog signal at its
input and provides a galvanically-isolated 4-20 mA or 0-20 mA process
current signal at its output. The module features high accuracy of ±0.05%,
±0.02% nonlinearity, and 1500 V

common mode voltage isolation

rms

protection. The transfer function provided by this module is as follows:

Input: 0 to +5 V or –5 V to +5 V

●

●

Output: 4-20 mA or 0-20 mA

For a more detailed description of the MB Series output modules, refer to
Chapter 3

.

MBAF Series Active Low-Pass Filter Modules

MBAF Series filters offer the following features:

●

MB Series plug-compatibility

●

+5 V power supply only
Differential input

●

●

Standard corner frequencies: 1 kHz, 2 kHz, 5 kHz, 10 kHz, 20 kHz,
50 kHz

Use MBAF Series filters for the following applications:

Prefiltering for anti-aliasing

●

Data acquisition

●

●

Industrial process control
Signal conditioning

●

1-6 Introduction

The MBAF Series are differential-input 9-pole Butterworth and Bessel
low-pass anti-aliasing filters that are pinout and package compatible with
industry-standard MB Series signal conditioning modules and mechanical
equivalents.

Table 1-2 shows the pinout for MBAF Series filters.

Table 1-2. MBAF Series Module Pinout

Pin Function Pin Function

1 N/A 4 N/A
2 N/A 5 IN LO
3 N/A 6 IN HI
16 POWER COM 20 Vout
17 +5V 21 N/A
18 N/A 22 N/A
19 I/O COM 23 N/A

For a more detailed description of the MBAF Series modules, refer to
Chapter 3

.

MBAF Series Active Low-Pass Filter Modules 1-7

MB Series Backplanes

Table 1-3 provides a brief summary the backplanes available for use with
MB Series modules.

Table 1-3. MB Series Backplanes

Model Description

MB01 Holds up to 16 modules and mounts in a 19-inch equipment rack.

Provides direct channel-to-channel connection to an analog board
making it suitable for high-speed, high-resolution applications.

MB02 Holds up to 16 modules and mounts in a 19-inch equipment rack. Up

to four MB02s can be multiplexed together, providing a total of 64

channels. This makes it suitable for larger systems.
MB03 DIN-rail compatible backplane that holds one module.
MB04 DIN-rail compatible backplane that holds two modules.
MB05 Holds up to eight modules and mounts in a 19-inch equipment rack.

Provides direct channel-to-channel connection to an analog board

making it suitable for high-speed, high-resolution applications.
STA-1360 Stand-alone test/evaluation socket for one module.
STA-MB Provides sockets for four modules.

For a more detailed description of the MB Series backplanes, refer to
Chapter 4

.

1-8 Introduction

Applications

Typical MB Series applications include mini- and microcomputer-based
measurement systems, standard data acquisition systems, programmable
controllers, analog recorders, and dedicated control systems. MB Series
modules are ideally suited to applications where monitoring and control
of temperature, pressure, flow, and other analog signals are required.
Figure 1-2 shows a block diagram of a general MB Series measurement
and control application.

mV , V, Thermocouple, RTD,

Potentiometer, Strain Gauge,

Frequency, 4–20 mA / 0–20 mA

Sensors,
Monitors

Process or
Equipment

Controls

(Valves, etc.)

4–20 mA / 0–20 mA

Input

Module

MB SERIES

MODULES

Output
Module

0 to +5 V / ±5 V

A/D

Analog I/O

D/A

0 to +5 V / ±5 V

Computer

Figure 1-2. Block Diagram of a General Measurement and Control Application

Applications 1-9

2

Setting Up an

MB Series System

This chapter tells how to set up an MB Series system consisting of a
backplane, signal conditioning modules, and an analog I/O board. It
discusses the MB01, MB02, MB03, MB04, MB05, STA-1360, and
STA-MB backplanes. This chapter includes the following sections:

●

Installing an MB Series backplane

●

Installing MB Series modules in the backplane
Connecting signals to the backplane

●

Connecting backplanes to Keithley MetraByte analog I/O boards

●

Caution:

discharge, wear a grounded wrist strap or similar device whenever
handling backplanes or modules.

To prevent damage to MB Series components due to static

2-1

Installing the MB Series Backplane

This section tells how to install each of the MB Series backplanes.

Selecting a Site

You can install the MB Series backplane and signal conditioning modules
in any location suitable for general-purpose electronic equipment. The
temperature in this location must be between –25°C and +85°C (–13°F
and +185°F) for rated performance. If the environment is harsh or
unfavorable, install the backplane in a protective enclosure.

Mounting the Backplane

The different backplane models have different mounting requirements.
Refer to the section below that describes mounting for your model.

Mounting: MB01, MB02, and MB05

The MB01, MB02, and MB05 backplanes mount in an RMT-MBBP
rack-mount enclosure, which in turn mounts in a 19-inch equipment rack.
The rack-mount enclosure has seven 3-mm threaded inserts for mounting
the backplane, six threaded inserts for mounting an adaptor board on the
back, and four holes for mounting a PWR-51A or PWR-55A power
supply on the back. The rack-mount enclosure kit includes screws.

Note:

The PWR-55A power supply has replaced the PWR-53A power

supply, which is now obsolete.

To install the MB01, MB02, or MB05 backplane, perform the following
steps:

1. Screw the backplane into the rack-mount enclosure as shown in
Figure 2-1.

2. Attach the rack-mount enclosure to the equipment rack.

2-2 Setting Up an MB Series System

MB01, MB02, or MB05

Backplane

Optional Power

Supply

Rack-mount

Enclosure

Figure 2-1. Mounting the Backplane in the Rack-Mount Enclosure

Mounting: MB03 and MB04

You can set up the MB03 and MB04 for DIN-rail mounting using special
mounting hardware. Refer to Chapter 4 for ordering information.

Mounting: STA-1360

The STA-1360 ships with standoffs for bench top use. You can also set up
the STA-1360 backplane for DIN-rail mounting using special mounting
hardware. Refer to Chapter 4 for ordering information.

Mounting: STA-MB

The STA-MB is factory-mounted in a free-standing plastic enclosure.

Installing the MB Series Backplane 2-3

Connecting Power

MB Series backplanes require external +5 V power. Before selecting a
power supply, determine the total backplane current requirement. To do
this, add the current requirements for the MB Series modules you plan to
install in the backplane. T able 2-1 sho ws the current requirements for MB
Series modules.

Table 2-1. MB Series Module Power Requirements

Model Current Model Current

MB30 30 mA MB38 200 mA
MB31 30 mA MB39

MB32 30 mA MB40 30 mA
MB34 30 mA MB41 30 mA
MB36 30 mA MB45 110 mA
MB37 30 mA MB47 30 mA

Notes

1

Maximum output load resistance is 750 Ω

170 mA

1

Keithley of fers two +5 V external supplies that mount directly to the back
of the RMT-MBBP rack-mount enclosure: the PWR-51A, which delivers
up to 1 A, and the PWR-55A, which delivers up to 5 A.

Refer to the section below that describes power connection for your
backplane model.

2-4 Setting Up an MB Series System

Power: MB01. MB02, and MB05

To connect power to the MB01, MB02, or MB05 backplane, perform the
following steps:

1. Mount the power supply in its permanent location.
If you are using the PWR-51A or PWR-55A, attach the power supply

directly to the back of the rack-mount enclosure as shown in Figure
2-1.

2. Find the power terminal block on the backplane as shown in Figure
2-2.

MB02

Power T erminal

Block

MB01

Power T erminal

Block

MB05

Figure 2-2. Power Terminal Block Locations: MB01, MB02, and MB05

3. Using #12 to #16 AWG wire, connect the power supply to the
backplane as shown in Figure 2-3. The terminals are labeled on the
board as +5 V and PWR COM.

Installing the MB Series Backplane 2-5