Omega OME-DB-889D User Manual

User’s Guide

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OME-DB-889D

16-Channel Analog Multiplexer Board

Servicing North America:

USA: One Omega Drive, P.O. Box 4047

ISO 9001 Certified Stamford CT 06907-0047

TEL: [phone] FAX: [phone]
e-mail: [e-mail]

Canada: 976 Bergar

Laval (Quebec) H7L 5A1, Canada
TEL: [phone] FAX: [phone]
e-mail: [e-mail]

For immediate technical or application assistance:

USA and Canada: Sales Service: 1-800-826-6342 / 1-800-TC-OMEGA

®

Customer Service: 1-800-622-2378 / 1-800-622-BEST

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Engineering Service: 1-800-872-9436 / 1-800-USA-WHEN

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TELEX: 996404 EASYLINK: 62968934 CABLE: OMEGA

Mexico: En Espan˜ ol: [phone]-7803 e-mail: [e-mail]

FAX: [phone] [e-mail]

Servicing Europe:

Benelux: Postbus 8034, 1180 LA Amstelveen, The Netherlands

TEL: [phone] FAX: [phone]
Toll Free in Benelux: 0800 0993344
e-mail: [e-mail]

Czech Republic: Frystatska 184, 733 01 Karviná, Czech Republic

TEL: [phone] FAX: [phone]
Toll Free: 0800-1-66342 e-mail: [e-mail]

France: 11, rue Jacques Cartier, 78280 Guyancourt, France

TEL: [phone] FAX: [phone]
Toll Free in France: 0800 466 342
e-mail: [e-mail]

Germany/Austria: Daimlerstrasse 26, D-75392 Deckenpfronn, Germany

TEL: [phone] FAX: [phone]
Toll Free in Germany: 0800 639 7678
e-mail: [e-mail]

United Kingdom: One Omega Drive, River Bend Technology Centre

ISO 9002 Certified Northbank, Irlam, Manchester

M44 5BD United Kingdom
TEL: [phone] FAX: [phone]
Toll Free in United Kingdom: 0800-488-488
e-mail: [e-mail]

OMEGAnet®Online Service Internet e-mail

www.omega.com [e-mail]

It is the policy of OMEGA to comply with all worldwide safety and EMC/EMI regulations that
apply. OMEGA is constantly pursuing certification of its products to the European New Approach
Directives. OMEGA will add the CE mark to every appropriate device upon certification.

The information contained in this document is believed to be correct, but OMEGA Engineering, Inc. accepts
no liability for any errors it contains, and reserves the right to alter specifications without notice.
WARNING: These products are not designed for use in, and should not be used for, patient-connected applications.

OME-DB-889D MULTIPLEXER BOARD .........................................................................................2

1. FUNCTION DESCRIPTION............................................................................................................2

1.1 FEATURES ........................................................................................................................................2

1.2 APPLICATIONS .................................................................................................................................2

1.3 SPECIFICATION.................................................................................................................................2

2. INSTALLING.....................................................................................................................................4

2.1 LAYOUT ...........................................................................................................................................4

2.2 JUMPER SETUP..................................................................................................................................5

2.2.1 JP0 ~ JP15 Analog Input R/C Filter ........................................................................................5

2.2.2 JP16 Analog Output Channel Jumper .....................................................................................5

2.2.3 JP19 Internal / External Power selection ................................................................................6

2.2.4 JP18 Local / Remote Gain control ........................................................................................6

2.3 PIN ASSIGNMENT .............................................................................................................................8

3 ANALOG INPUT & GAIN SETTING............................................................................................10

3.1 INPUT CHANNEL SELECTION ..........................................................................................................10

3.2 GAIN SETTING................................................................................................................................11

3.3. THE THERMOCOUPLE INPUT ......................................................................................................... 12

3.3.1 Voltage - TO - Temperature Conversion................................................................................13

3.3 CJC OUTPUT.................................................................................................................................. 14

4 SIGNAL CONNECTION .............................................................................................................. 15

4.1 FLOATING SIGNAL CONNECTION ................................................................................................... 15

4.2 NON-FLOATING SIGNAL SOURCE...................................................................................................16

4.3 CASCADING OME-DB-889D......................................................................................................... 17

4.4 OPEN THERMOCOUPLE DETECTION................................................................................................18

4.5BLOCK DIAGRAM ...........................................................................................................................19

5 PROGRAMMING ............................................................................................................................20

5.1 USING OME-A-822PGL ...............................................................................................................20

5.3 EXAMPLE PROGRAM ......................................................................................................................21

6. CALIBRATION ...............................................................................................................................23

6.1 CALIBRATION VR DESCRIPTION ....................................................................................................23

6.2 CALIBRATION STEPS ......................................................................................................................23

OME-DB-889D User’s Manual

1

OME-DB-889D Multiplexer Board

1. Function Description

The OME-DB-889D is an expansion multiplexer / amplifier board for use with
OME-A-82X, OME-PCI-1800 series. Each OME-DB-889D multiplexes 16
differential analog input channels into one analog input of the DAS board. The high
grade instrumentation provides software programmable gains of 0.5, 1, 5, 10, 50, 100,
500 and 1000.

Thermocouple measurements are handled easily with OME-DB-889D. The
board includes cold junction sensing and compensation circuitry that provides a
scaling of 24.4mV/°C. Biasing restores are includes for open thermocouples
detentions of voltage measurements or 112 channels of thermocouple measurement.

1.1 Features

z Connects directly to OME-A-82X, OME-PCI-1800 series boards with D-sub 37

connectors.

z Cold-junction compensation for thermocouples and thermocouple open detection.
z Software-programmable instrumentation amplifier
z Gain of 0.5, 1, 5, 10, 50, 100, 500, 1000
z Daisy chain up to ten OME-DB-889D boards

1.2 Applications

z Energy management

z Signal conditioning

z Analog Multiplexer

1.3 Specification

z Accepts thermocouple type : J, K, T, E, S, R, B
z Cold-junction Compensation : +24.4mV/°C , 0V at 0°C
z Overvoltage protection : ±30V Continuous
z Common mode voltage : ±10V max.
z Analog output Voltage to A/D card :±10V

OME-DB-889D User’s Manual

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Gain Common Mode

Rejection

0.5 99dB

1 99dB

5 114dB

10 99dB

50 123dB

100 123dB

500 123dB

1000 123dB

z Power requirement : +5V@120mA

z Dimension :114mm X 204mm

z Operating temperature : 0~60°C

z Storage temperature : -20~80°C

z Humidity : 5% to 90% non condensing

Non linearity %of

FSR

±0.0004

±0.0004

±0.0004

±0.0004

±0.0004

±0.0004

±0.0008

±0.0008

Settling Time

23uS

23uS

28uS

28uS

140uS

140uS

1300uS

1300uS

OME-DB-889D User’s Manual

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2. Installing

2.1 Layout

JP19

External

Voltage Input

Jumper /Connector

Name

CN1
CN2
CN3
CN4
CN5

CN6, CN8

CN7

JP0~JP15

JP16

JP17

JP18

JP19

CJC Output

JP18

Function Note

Connect to A/D connector of OME-A-82x series
Cascaded to another OME-DB-889D
Connect to D/O connector of OME-A-82x series
Cascaded to another OME-DB-889D
External +5V power input
Analog input channel 0~ channel 15
CJC signal output connector
Channel 0 ~ channel 15 R/C filter enable

Analog output channel selection

CJC output channel selection

Gain control by on board dip switch or digital

output of OME-A-82x series multi-function card

Use PC’s +5V or External +5V power

VR2 VR1

Select by JP19

Short : Filter Enable

Open : Filter Disable

to OME-A-82x series

A/D card

to OME-A-82x series

A/D card

L : by dip switch

R : by Digital output

OME-DB-889D User’s Manual

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K

Ω

2.2 Jumper setup

2.2.1 JP0 ~ JP15 Analog Input R/C Filter

The OME-DB-889D provides R/C filter with each analog input channel by jumper

setting.

Channel 0 High

1.2

Channel 0 Low

Short : with filter

Default setting

1.2KΩ

JP0~JP15

Open : Without filter

1uF 50V

2.2.2 JP16 Analog Output Channel Jumper

The OME-DB-889D supports 10 separate jumper to select output channel, This

feature permits up to 10 OME-DB-889D’s be connected to a 10 channel analog input

card. Place the jumper in the output channel according to the channel of the analog

input card selected for that OME-DB-889D board. The following table illustrates the

jumper setting of using the OME-DB-889D with the OME-A-82X series.

X
A/D CH0
A/D CH1
A/D CH2
A/D CH3
A/D CH4
A/D CH5
A/D CH6
A/D CH7
A/D CH8
A/D CH9

JP16 JP17

Analog output

CJC output

X
0
1
2
3
4
5
6
7
8
9

OME-DB-889D User’s Manual

If none of the output channel is used,

leave the jumper in position “X”. If

the CJC output is required for the

thermocouple applications, be aware

that the analog output and CJC output

share the connector for the analog

output and the CJC output.

Note: “X” means channels are not

supported by the OME-A-82Xseries

5

2.2.3 JP19 Internal / External Power selection

The OME-DB-889D requires single +5V power supply. the connector CN5 are

used for the external power supply connection. The OME-A-82X series

multi-function card offers +5V power from the 37 pin connector , The

OME-DB-889D can be directly from the PC I/O bus by connecting the

OME-A-82Xseries multi-function card.

JP19

From PC’s +5V Power

Default Setting

From the CN5 input External +5V power

2.2.4 JP18 Local / Remote Gain control

The OME-DB-889D provides local and remote control and the selection depends on

the setting of the switch SW1.

L R

Remote Gain Control

Default Setting

Note:

“L” Local Gain control : from OME-DB-889D on board dip switch setting

JP18

L R

Local Gain Control

“R” Remote Gain control : from OME-A-82X series A/D card digital output

control

OME-DB-889D User’s Manual

6

Remote Gain Control

When the JP18 is set to “R”, it means Remote Gain Control is selected and the

gain is controlled by the digital signal of connector CN3 bit D4, D5, D6. The bit

pattern and related gain is illustrated as:

CN3

D6 D5 D4 Gain

0 0 0 0.5

0 0 1 1

0 1 0 5

0 1 1 10

1 0 0 50

1 0 1 100

1 1 0 500

1 1 1 1000

Local Gain Control

Sw1

1 2 3 4 Gain

ON ON ON OFF 0.5

ON ON OFF OFF 1

ON OFF ON OFF 5

ON OFF OFF OFF 10

OFF ON ON OFF 50

OFF ON OFF OFF 100

OFF OFF ON OFF 500

OFF OFF OFF OFF 1000

OME-DB-889D User’s Manual

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