Omega OM-USB-1208FS manual Analog output, Digital input/output

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OM-USB-1208FS User's Guide

 

 

Specifications

 

 

 

 

Table 7. Noise performance, single-ended mode

 

 

 

 

 

 

 

 

 

Range

 

Typical Counts

 

LSBrms

 

 

 

 

 

 

 

 

 

 

 

±10 V

 

2

 

0.30

 

 

Analog output

 

 

 

 

 

 

 

 

 

Table 8. Analog output specifications

 

 

 

 

 

 

 

Parameter

 

 

Conditions

Specification

 

 

 

 

 

 

 

 

 

Resolution

 

 

 

12-bits, 1 in 4096

 

 

 

 

 

 

 

 

 

Output range

 

 

 

0 – 4.096 V, 1 mV per LSB.

 

 

 

 

 

 

 

 

Number of channels

 

 

2

 

 

 

 

 

 

 

 

Throughput (Note 4)

 

Software paced

250 S/s single channel typical, PC dependent

 

 

 

 

 

 

Single channel, continuous scan

10 kS/s

 

 

 

 

 

 

Dual channel, continuous scan,

5 kS/s

 

 

 

 

 

 

simultaneous update

 

 

 

Power on and reset voltage

 

 

Initializes to 000h code

 

 

 

 

 

 

 

 

 

Output drive

 

 

Each D/A OUT

15 mA

 

 

 

 

 

 

 

 

 

Slew rate

 

 

 

0.8V/microsecond (µs) typ

 

 

 

 

 

 

 

 

 

Note 4: Maximum throughput scanning to PC memory is machine dependent. The rates specified are for Windows XP only. Maximum rates on operating systems that predate XP may be less and must be determined through testing on your machine.

Table 9. Analog output accuracy, all values are (±)

Range

 

Accuracy (LSB)

 

 

 

 

 

 

 

0-4.096 V

 

4.0 typ, 45.0 max

 

 

 

 

 

 

 

 

Table 10. Analog output accuracy components, all values are (±)

 

 

 

 

 

 

Range

% of FSR

Gain Error at FS (mV)

Offset (mV)

Accuracy at FS

 

 

 

(Note 5)

(mV)

 

 

 

 

0-4.096 V

0.1 typ, 0.9 max

4.0 typ, 36.0 max

1.0 typ, 9.0 max

4.0 typ, 45.0 max

Note 5: Negative offsets will result in a fixed zero-scale error or ―dead band.‖ At the maximum offset of -9 mV, any input code of less than 0x009 will not produce a response in the output.

Digital input/output

 

Table 11. Digital I/O specifications

 

 

Digital type

CMOS

 

 

Number of I/O

16 (Port A0 through A7, Port B0 through B7)

Configuration

2 banks of 8

Pull up/pull-down configuration

All pins pulled up to Vs via 47K resistors (default). Positions available for pull

 

down to ground. Hardware selectable via zero ohm (Ω) resistors as a factory

 

option.

 

 

 

Input high voltage

2.0

V min, 5.5 V absolute max

Input low voltage

0.8

V max, –0.5 V absolute min

Output high voltage

3.8

V min

(IOH = -2.5 mA)

 

 

Output low voltage

0.7

V max

(IOL = 2.5 mA)

 

 

Power on and reset state

Input

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Contents Page Page Table of Contents OM-USB-1208FS Users Guide Where to find more information About this Users GuideWhat you will learn from this user’s guide Conventions in this user’s guideIntroducing the OM-USB-1208FS ChapterOM-USB-1208FS block diagram Software featuresConnecting a OM-USB-1208FS to your computer is easy Installing the OM-USB-1208FS What comes with your OM-USB-1208FS shipment?Unpacking the OM-USB-1208FS HardwareInstalling the software Installing the hardwareBe sure you are using the latest system software If the LED turns offSoftware paced mode Continuous scan modeFunctional Details Theory of operation analog input acquisition modesUSB connector Screw terminal wiringScrew terminal pins Main connector and pin out Single-ended configurationAnalog input terminals CH0 in CH7 Single-ended measurements using differential channels Differential configurationChhi Chlo Power terminals For more information on analog signal connectionsFor more information on digital signal connections Analog output terminals D/A OUT 0 and D/A OUTCalibration terminal Ground terminalsExternal trigger terminal Sync terminalAccuracy Ideal ADC transfer functionADC transfer function with offset error OM-USB-1208FS channel gain queue feature Error band plotConfiguring for synchronous data acquisition Synchronizing multiple unitsSpecifications Analog inputRange Accuracy LSB Analog output Digital input/outputExternal trigger External clock input/outputCounter Power Non-volatile memoryMicrocontroller Main connector and pin out Channel differential modeGeneral EnvironmentalChannel single-ended mode

OM-USB-1208FS specifications

The Omega OM-USB-1208FS is a high-performance data acquisition device designed for engineers and technicians who require accurate data logging and analysis in their experiments and applications. This versatile device is equipped with a range of features that make it an ideal choice for various measurement tasks across different industries.

One of the standout features of the OM-USB-1208FS is its ability to support a wide variety of input signals. The device is equipped with 16 analog input channels, which can be used for both voltage and thermocouple inputs, making it suitable for temperature monitoring and other signal measurements. The analog inputs provide a resolution of 16 bits, ensuring precise and reliable readings. Furthermore, it supports sampling rates of up to 100 kS/s, allowing for rapid data acquisition and real-time monitoring.

In addition to its analog capabilities, the OM-USB-1208FS has digital I/O lines that facilitate control and automation tasks. With 8 digital input/output channels, users can easily manage various external devices, sensors, or actuators, enhancing the overall functionality of the data acquisition system. This makes the device suitable for automation projects, as users can trigger actions based on acquired data.

Another distinguishing feature is the built-in USB interface, which offers a straightforward connection to computers without the need for additional power supplies or complex setups. The device is fully compatible with various operating systems, including Windows, making it easy to integrate into existing systems. The included software allows for easy data logging, visualization, and analysis, simplifying the process for users.

The OM-USB-1208FS is designed with durability and reliability in mind. Its compact and rugged construction ensures that it can withstand the rigors of fieldwork and laboratory use. Moreover, the device's comprehensive range of input types and robust performance specifications make it an asset for researchers across diverse fields, including environmental monitoring, manufacturing, and academic research.

In summary, the Omega OM-USB-1208FS is a powerful data acquisition solution that combines a multitude of features and technologies. With its high-resolution analog inputs, digital I/O capabilities, user-friendly USB interface, and reliable construction, it caters to the diverse needs of professionals seeking to capture and analyze data accurately and efficiently. Whether for academic research, industrial applications, or environmental monitoring, the OM-USB-1208FS stands out as a top choice in the data acquisition landscape.
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