Signametrics Corporation SM4020 Manuel utilisateur

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NOTICE: Signametrics was acquired by Agilent Technologies in October 2010. This document,

published prior to that date, is provided as a courtesy and may contain references to products or

services no longer supported by Agilent. For the latest information on Agilent’s modular test and

measurement products go to: www.agilent.com/find/modular

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5990-9491EN

Operator's Manual

Model SM4020 20 Channels Relay Multiplexer

Model SM4022 20 Channels Instrumentation Relay

Multiplexer

Model SM4040 40 Channels Relay Multiplexer

Model SM4042 40 Channels Instrumentation Relay

Multiplexer

Signametrics Corporation

March, 2006

Signametrics 2

CAUTION

In no event shall Signametrics or its Representatives be liable for any consequential damages whatsoever (including,

without limitation, damages for loss of business profits, business interruption, loss of business information, or other

loss) arising out of the use of or inability to use Signametrics’ products, even if Signametrics has been advised of

the possibility of such damages. Because some states do not allow the exclusion or limitation of liability for

consequential damages, the above limitations may not apply to you.

reproduced in any form without the permission of Signametrics Corporation.

3 Signametrics

TABLE OF CONTENTS

1.0 INTRODUCTION.................................................................................................................................................5

1.1

AFETY

ONSIDERATIONS

..........................................................................................................................5

1.2

INIMUM

EQUIREMENTS

.........................................................................................................................5

1.3

ESCRIPTION

..............................................................................................................................................6

1.4

ONFIGURATIONS

.......................................................................................................................................7

1.5

ELF

EST AND

ONTACT

LEANING

.........................................................................................................7

2.0 SPECIFICATIONS AND FEATURE TABLE...................................................................................................8

2.1

RIGGER

NPUT

..........................................................................................................................................8

2.2

RIGGER

UTPUT

.......................................................................................................................................9

2.3

THER

PECIFICATIONS

.............................................................................................................................9

3.0 GETTING STARTED...........................................................................................................................................9

3.1

ETTING THE

CANNER

..............................................................................................................................9

3.2

NSTALLING THE

OFTWARE

.....................................................................................................................10

3.3

NSTALLING THE

CANNER

ODULE

........................................................................................................10

3.4

CANNER

ONNECTOR

OUT

...............................................................................................................10

3.5

TARTING THE

ONTROL

ANEL

..............................................................................................................13

3.6

SING THE

ONTROL

ANEL

....................................................................................................................14

4.0 SCANNER TUTORIAL .....................................................................................................................................15

4.1

CANNER

ONFIGURATIONS

.....................................................................................................................15

4.1.1 Two Wire Multiplexing ..........................................................................................................16

4.1.2 Four Wire Multiplexing .........................................................................................................16

4.1.3 Six Wire Multiplexing ............................................................................................................17

4.1.4 Two Groups Configuration....................................................................................................17

4.1.5 Four Groups Configuration...................................................................................................18

4.1.6 Disabled.................................................................................................................................18

4.2

CANNER

PERATIONS

.............................................................................................................................18

4.2.1 Trigger Output.......................................................................................................................18

4.2.2 Trigger Input..........................................................................................................................19

4.2.3 Auto Scan Operation..............................................................................................................19

4.2.4 Triggered Auto Scan Operation.............................................................................................19

4.2.5 Triggered Scan Operation .....................................................................................................20

4.2.6 Single Step Scan Operation ...................................................................................................20

4.2.7 Scan List Operations..............................................................................................................21

4.2.8 Locating Shorted Channel .....................................................................................................21

4.2.9 Cleaning Relays Contacts......................................................................................................22

4.2.10 Integrity Test........................................................................................................................22

4.2.11 Self Tests ..............................................................................................................................22

4.2.12 Setting Actuation Time Parameter.......................................................................................22

4.2.13 Setting Step Time Parameter ...............................................................................................23

4.2.14 Thermocouple Temperature Measurements.........................................................................23

4.3

OLLED

YPE

PERATIONS

......................................................................................................................23

4.4

NTERFACING TO THE

SM2040

SERIES

6-1/2

IGIT

DMM........................................................................24

4.4.1 Triggering the SM2040 DMMs..............................................................................................24

4.4.2 Multiplexing with the SM2040 DMMs...................................................................................24

4.4.3 Interface Commands and Timing...........................................................................................24

4.5

INGLE

NDED APPLICATION

XAMPLE

...................................................................................................25

4.5.1 Point to Point Configuration .................................................................................................25

4.5.2 An 84 Point, Single End Configuration .................................................................................26

5.0 SM4040 SCANNER FAMILY WINDOWS INTERFACE..............................................................................26

5.1

ISTRIBUTION

ILES

................................................................................................................................26

Signametrics 4

5.2

SING THE

SM4040

RIVER WITH

C++

IMILAR

OFTWARE

.............................................................27

5.2.1 Multiple Card Operations under Windows............................................................................28

5.3

ISUAL

ASIC

RONT

ANEL

PPLICATION

.............................................................................................29

5.3.1 Visual Basic Simple Application............................................................................................29

5.4

INDOWS

DLL

EFAULT

ODES AND

ARAMETERS

..............................................................................30

5.5

SING THE

SM4040

DLL

WITH

INDOWS

/CVI®............................................................................31

5.6

INDOWS

OMMAND

ANGUAGE

...........................................................................................................31

SCANAbort......................................................................................................................................31

SCANAutoScan ...............................................................................................................................32

SCANCleanRelays...........................................................................................................................33

SCANClosePCI...............................................................................................................................34

SCANDelay.....................................................................................................................................34

SCANErrString ...............................................................................................................................35

SCANGetActuationTime .................................................................................................................36

SCANGetBusInfo.............................................................................................................................36

SCANGetConfig..............................................................................................................................37

SCANGetGrdVer.............................................................................................................................37

SCANGetHwVer..............................................................................................................................38

SCANGetID.....................................................................................................................................38

SCANGetManDate..........................................................................................................................39

SCANGetScanList...........................................................................................................................39

SCANGetShortedChannel...............................................................................................................40

SCANGetStepTime..........................................................................................................................40

SCANGetTriggerIn .........................................................................................................................41

SCANGetType.................................................................................................................................41

SCANGetVer...................................................................................................................................42

SCANInit.........................................................................................................................................42

SCANIsInitialized............................................................................................................................43

SCANOpenAllChannels ..................................................................................................................43

SCANOpenPCI................................................................................................................................44

SCANReady.....................................................................................................................................44

SCANSelectChannel........................................................................................................................45

SCANSelectChannelCmd................................................................................................................46

SCANSetActuationTime ..................................................................................................................46

SCANSetChannelRelay ...................................................................................................................47

SCANSetConfig...............................................................................................................................48

SCANSetConfigRelay......................................................................................................................48

SCANSetScanList............................................................................................................................49

SCANSetStepTime...........................................................................................................................50

SCANSetTriggerOut........................................................................................................................50

SCANSetupStep...............................................................................................................................51

SCANStep........................................................................................................................................51

SCANStepCmd ................................................................................................................................52

SCANTerminate ..............................................................................................................................53

SCANTestChanIntegrity..................................................................................................................53

SCANTestChannelRelay .................................................................................................................54

SCANTestConfigRelay....................................................................................................................54

SCANTrigAutoScan.........................................................................................................................55

SCANTriggerInState.......................................................................................................................56

SCANTriggerOutState.....................................................................................................................56

SCANTrigScan................................................................................................................................57

6.0 ACCESSORIES...................................................................................................................................................59

7.0 WARRANTY AND SERVICE...........................................................................................................................59

1.0 Introduction

Congratulations! You have purchased a Personal Computer (PC) Plug-in instrument with analog and systems

performance that rivals the best, all-in-one box, instruments. The SM4040 series relay scanner/multiplexer are easy

to setup and use, have sophisticated analog and digital circuitry to provide very repeatable switching. Please take a

few moments and review this manual before installing and using this instrument.

This manual describes the SM4020, SM4022, SM4040, and SM4042 Scanners. Each delivers unmatched switching

performance in a PCI plug-in instrument. With a rich repertoire of functions, the SM4040 series out performs all

other plug-in Scanners, including most brand-name bench top units.

Note: In this manual, all references to the "SM4000" and “Scanner” applies to the SM4020, SM4022, SM4040, and

SM4042. Features unique to each product will be identified as such.

1.1 Safety Considerations

Safety Considerations

The SM4000 series of Scanners are capable of switching 110 VDC or 220, depending on model number,

across the High and Low terminals. They can also handle common mode signals that "float" the Scanner

above EARTH ground by up to 110 VDC or 220 VAC, depending on the model. When making common

mode switching, the majority of the circuits inside the Scanner are at the common mode voltage. These

voltages can be lethal and may KILL! During and after installing your Scanner, check to see that

there are no wires or ribbon cables from your PC trapped inside the Scanner.

The Scanner comes installed with four shields (bottom, top, and two edge strips) that must not be

removed for performance as well as safety reasons. Removal of these shields and/or improper

assembly of the shields can result in lethal voltages occurring within your PC. Be sure to check your

installation before closing the cover on your personal computer.

Warning

Check to see that no loose wires or ribbon cables infringe upon any of the internal circuits of the

Scanner, as this may apply lethal voltages to your computer, causing electrocution and/or damage to

your computer!

To avoid shock hazard, install the Scanner only into a computer that has its power connector

connected to a power receptacle with an earth safety ground.

When connecting to signals above 50 VDC or 40 VAC, only use Safety Test Leads and harnesses.

1.2 Minimum Requirements

The SM4040 series of system relays Scanners are plug-in modules that are compatible with IBM type personal

computers (PCs), from the 486 class to the Pentiums. They require a half-length expansion slot on the PCI bus. A

mouse must be installed when controlling the Scanner from the Windows Control Panel. The SM4040 comes with a

Windows' DLL, for operation with Windows' Version 95/98 and NT4.0, Windows 2000 or greater.

5 Signametrics

1.3 Description

The SM4020 and SM4022 are 20 channel models arranged in two groups of 10:1 differential channels. The

SM4040 and SM4042 are 40 channel models arranged in four groups of 10:1 differential channels. The “2” suffix

indicates an instrumentation quality scanning structure, while the “0” indicates standard general purpose scanning

structure. The Instrumentation models are necessary in applications requiring precision and low leakage. The most

outstanding feature of the Instrumentation models is a very low Thermal EMF, resulting is highly accurate Ohms,

low Voltage, temperature and other sensitive stimulus and measurements. The standard scanners in this family, the

SM4020 and SM4040, exhibit much lower Thermal EMF than most other plug-in relay scanners.

When using an SM2020 or an SM2040 series 5-1/2 and 6-1/2 DMMs, or similar DMM, it is necessary to use the

Instrumentation quality scanners in order to maintain full measurement accuracy.

These scanners are software configurable on the fly, and can handle several pre-defined switching configurations,

such as TwoWire, FourWire, SixWire, Universal, TwoGroups, FourGroups, and Disabled. In the TwoWire

configuration, the scanner acts like a 20 or 40 channel multiplexer. In the FourWire configuration, it automatically

selects two simultaneous channels, allowing a DMM or other device to connect to four individual lines. In the

SixWire configuration six wires, or three differential channels are selected automatically, providing such

applications as six wire guarded in circuit measurements. The Universal configuration turns the scanner into a

pseudo matrix structure, allowing any relay, including channel relays, tree relays and configuration relays, to be

closed or open, including multiple relays. The TwoGroups and FourGroups configurations split the Scanner into

several independent Two-Wire multiplexers.

Figure 1-1. Simplified diagram of the SM4000 relay scanner.

In the TwoWire, FourWire, SixWire, TwoGroups, and FourGroups configuration, the switching sequence includes

the opening of the previously closed channels and then closing of the selected channels. In the case where multiple

channels are supposed to be closed, such as in FourWire configuration, these channels are closed simultaneously so

that no additional time beyond the actuation time is consumed. Break-before-make operation is maintained due to a

high speed turns off circuit, which shuts off the active coil current very quickly as compared to the turn on time.

Signametrics 6

7 Signametrics

1.4 Configurations

In addition to the channel switching relays, the SM4000 series includes two sets of relays used for configuring of

the scanner. The configuration switches facilitate inter-group connections and the Tree relays provide isolation of

each of the group’s buses from their respective channel relays. These relays are automatically switched on the fly

when the scanner receives configuration commands or changes are required while selecting channels from various

groups. In cases where the pre-defined configurations (TwoWire, FourWire, SixWire, TwoGroups, and FourGroups)

do not meet the test needs, select the Universal configuration. It allows an unlimited control any of the configuration

and tree relays independently. Care must be taken however, since it does not offer the protection of the predefined

configurations. This could result in shorting some “hot” lines, constituting in potential hazard to the user from any

thing that is connected to the scanner and from the scanner itself. This could also lead to damaging the scanner or

anything connected to it.

1.5 Self Test and Contact Cleaning

In addition to the channel relays, Tree relays and Configuration relays, there are additional relays and circuit

components that handle the various tests built into the Scanners. The user does not have direct control of these

components.

The test connector is used in various self tests and cleaning operations of the Scanner. It is a Female DIN 96

position connector which has 40 shorts across all Channels (Ch1Hi shorted to Ch1Lo etc.), and three shorts across

the B-Bus, C-Bus and D-Bus. All other terminals, including the A-Bus must be left open. This Test Connector is

optionally available from Signametrics.

Signametrics 8

2.0 Specifications and Feature Table

Function SM4020

Standard

Scanner

SM4022

Instrumentation

Scanner

SM4040

Standard

Scanner

SM4042

Instrumentation

Scanner

Number of differential channels 20 40 20 40

Number of 10:1 groups two four two four

Scanning Arrangement Two groups of 10:1 differential Four groups of 10:1 differential

Thermal EMF offset (µV) 25 1.5 25 1.5

Maximum Switching DC Voltage (V) 110 220 110 220

Maximum Switching AC Voltage (V) 110 250 110 250

Maximum Switching Current (A) 1 1 1 1

Typical inter-channel Capacitance 15pf 15pf 15pf 15pf

Insulation between open contacts (

MΩ,)

>100 >1,000 >100 >1,000

Insulation; contacts to coils

(MΩ)

>100 >1,000 >100 >1,000

Insulation; adjacent channels

(MΩ)

>100 >1,000 >100 >1,000

No Load Life 2X10

2X10

Loaded Life @ 50Vdc, 0.1A 3X10

3X10

Trigger input √√√√

Trigger output √√√√

Thermocouple Cold Junction Capable √√

Typical Closure Time (ms) 12 4 12 4

Typical Release Time (ms) 5 2 5 2

Actuation Time (ms) [1] 15 5 15 5

Actuation Time Settable Range (ms) 1 to 850 in 0.25 steps

AutoScan Period Range (ms) 1 to 850 in 0.25 steps

Available Configurations 2-wire, 4-wire,

universal, two-

groups

2-wire, 4-wire, 6-

wire, universal,

two-groups, four-

groups

2-wire, 4-wire,

universal, two-

groups

2-wire, 4-wire, 6-

wire, universal,

two-groups, four-

groups

Available Scan Groups A and B A, B, C and D A and B A, B, C and D

Isolated Relay Coil Drive √√

Maximum number of relays closed All All All 40

High Ohms range 1,000 Meg √

[1] Actuation time is the time it takes to open any closed relays, and close the selected relay.

Table 2-1. Specifications and Feature table.

2.1 Trigger Input

Input Characteristics

•Input LED (nominal 1.7V drop at 1mA) with a series 1kΩresistor.

•Input Signal requirements >2.5 V, < 10 V to activate. < 1V to deactivate.

•Isolation Optically Isolated from all other circuitry. Common line with Trigger Output.

Figure 2-1. Trigger input equivalent circuit.

2.2 Trigger Output

Output Characteristics

•Output Circuit Open collector of a NPN transistor (nominal 0.4V saturation voltage) in series with 1kΩ

resistor.

•Collector Emiter Voltage < 30 V

•Output Current < 4 mA

•Reverse Voltage < 7V

•Isolation Optically Isolated from all other circuitry. Common line with Trigger Input.

Figure 2-2. Trigger Output Optical Isolator NPN circuit.

2.3 Other Specifications

Hardware Interface PCIBus

Safety Designed to IEC 1010-1, Installation Category I.

Temperature Range 0°C to 50°C, operating

Size 9.2” X 4.4”

Power +5 volts, 550 mA maximum

Note: Signametrics reserves the right to make changes in materials, specifications, product functionality, or

accessories without notice.

3.0 Getting Started

After unpacking the Scanner, please inspect for any shipping damage that may have occurred, and report any claims

to your transportation carrier.

The Scanner package is shipped with the Scanner module, four floppy disks containing software drivers, user

interface panel, and this Operator's manual.

3.1 Setting the Scanner

The SM4040 series Relay Scanners are PCI plug-and-play devices and do not require any switch settings, or any

other adjustments to the hardware prior to installation.

9 Signametrics

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