Omega Speaker Systems manual OME-DB-889D Multiplexer Board Function Description, Features

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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

zConnects directly to OME-A-82X, OME-PCI-1800 series boards with D-sub 37 connectors.

zCold-junction compensation for thermocouples and thermocouple open detection.

zSoftware-programmable instrumentation amplifier

zGain of 0.5, 1, 5, 10, 50, 100, 500, 1000

zDaisy chain up to ten OME-DB-889D boards

1.2 Applications

zEnergy management

zSignal conditioning

zAnalog Multiplexer

1.3 Specification

zAccepts thermocouple type : J, K, T, E, S, R, B

zCold-junction Compensation : +24.4mV/°C , 0V at 0°C

zOvervoltage protection : ±30V Continuous

zCommon mode voltage : ±10V max.

zAnalog output Voltage to A/D card :±10V

OME-DB-889D User’s Manual

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Contents User’sGuide Servicing North America OME-DB-889D User’s Manual Features SpecificationOME-DB-889D Multiplexer Board Function Description ApplicationsFSR Installing LayoutJumper setup 1 JP0 ~ JP15 Analog Input R/C Filter3 JP19 Internal / External Power selection Local Gain Control Sw1 Pin Assignment Page Analog input & Gain setting Input Channel SelectionGain Setting Thermocouple Input Gain = OME-A-82X Gain X OME-DB-889D GainVoltage to Temperature Conversion CJC Output TC = V*1000/24.4Signal Connection Floating Signal ConnectionNon-Floating Signal Source Cascading OME-DB-889D OME-A-82X OME-DB-889DOpen Thermocouple Detection Block Diagram Using OME-A-822PGL ProgrammingExample Program DEMO01.CPage Calibration VR Description CalibrationCalibration Steps WARRANTY/DISCLAIMER Temperature