- Adds Analog I/O, Digital I/O and Frequency I/O to Ethernet-Based Test Systems
- All I/O Can Be Synchronous, Enabling Precise Timing Between Various I/O Functions
- 8 Differential or 16 Single-Ended Inputs, Expandable up to 256 Voltage or 896 Thermocouple Channels Using Signal Conditioning and Expansion Options
- Up to 40 Built-In TTL-Level Digital I/O, Expandable Up to 256 Channels of Isolated I/O Using Low-Cost Isolation Modules
- Includes Support for Visual Basic, C/C++, ActiveX/COM, LabVIEW, MATLAB and DASYLab
- Convenient 1U high 19" Rack-Mount Package Minimizes Rack Space in Test Systems
- Includes Out-of-the-Box DaqView Software to Facilitate Signal and Wiring Verification with No Programming Required
The OMB-DAQSCAN-2000 Seriesof Ethernet-based data acquisitionsystem components providesanalog, digital and frequency I/Ocapability for Ethernet-based testsystems. All OMB-DAQSCAN-2000 modelsare packaged in a 1U high-full rackpackage and include a rack-mountkit that can attach to either the frontor the rear of the enclosure. MultipleOMB-DAQSCAN models can becombined in the same system andsynchronized using a simple SYNCconnection between units. All I/O is accessed via female DB37connectors located at the rear ofthe unit, making cabling easy fromthe OMB-DAQSCAN-2000 to yourdevice-under-test.
Four models in theOMB-DAQSCAN-2000 Seriesare available, ranging from theOMB-DAQSCAN-2002 which offersdigital/frequency I/O, to the full-featuredOMB-DAQSCAN-2001,which includes 16 analog inputs,4 analog outputs, 40 digital I/O,4 frequency inputs and 2 timeroutputs.The OMB-DAQSCAN-2000 Seriesincludes comprehensive drivers forall popular Windows-basedenvironments, including VisualBasic, C/C++, ActiveX/COM,LabVIEW, MATLAB, and DASYLab.Also included with theOMB-DAQSCAN-2000 Seriesis DaqView, an interactivespreadsheet-style application thatis ideal for verifying signalconnections during system design.The compact 1U high 19” rackpackaging of the OMB-DAQSCAN-2000make it a compact componentfor rack-based systems. In additionto the built-in I/O provided by theOMB-DAQSCAN-2000 Series, awide variety of signal conditioningand expansion options areavailable.Below are some sample systemsthat can be derived from theOMB-DAQSCAN-2000 alongwith OMB-DBK options.
High Channel CountThermocouple Measurements
When combined with the OMB-DBK90 thermocoupleinput module, the OMB-DAQSCAN-2000 Series canmeasure up to 896 channels of T/C input. In theexample system to the right, any T/C type can beinstalled into any channel using standard mini T/Cconnectors. Each 56-channel OMB-DBK90 optionconsumes 2U of rack space and can be mountedon the front or rear of the rack chassis. Built-in coldjunction compensation coupled with T/C conversionalgorithms built into the software make temperaturemeasurements easy. Thermocouples are measuredat 1 ms/channel in a system based on theOMB-DBK90.
High-Isolation Voltageand Thermocouple Measurements
The OMB-DAQSCAN can be combined with theOMB-DBK207/CJC options to create an isolatedsystem capable of measuring up to 256 channelsof voltage, thermocouple, RTD and strain gageinputs. All input channels can be scanned up to200 kHz and are isolated by 500 V from otherchannels and from system common. Anycombination of input signals is possible byselecting the appropriate OM5 signal conditioningmodule for the OMB-DBK207/CJC.OMB-DBK207/CJCs can be mounted at thefront or rear of the rack. They attach to theOMB-DAQSCAN via a simple OMB-CA-37-10 cable.
Isolated Digital I/O System
When the OMB-DAQSCAN-2002 iscombined with the OMB-DBK208 options,up to 256 channels of isolated digital I/Oare possible, capable of controlling ACor DC voltages up to 250 V or sensingthe presence of AC or DC voltages.All channels are isolated from one anotherand from the system by up to 500 V. Inputscan be scanned in 16-bit increments atspeeds up to 200 Kreadings/s.The OMB-DBK208 can be mountedat the front or rear of the rack.
High-Speed VoltageMeasurement System
The OMB-DAQSCAN-2005 can becombined with OMB-DBK85 16-channelvoltage input modules to build a 5µs/channel voltage measurement systemwith up to 256 channels. All inputs canhave a different software programmableinput range, from 156 mV FS to 10 V FS,programmable on a per-channel basis.The 16 BNC inputs on the OMB-DBK85can be accessed from either the front orthe rear of a rack system.
Multifunction I/O System
All of the foregoing capabilities can becombined into a single system usingone OMB-DAQSCAN-2001 as thesystem centerpiece.
Specifications
GENERAL
Supply Voltage Range: 90 to 250 Vac
Power Required: 15 W (assuming noOMB-DBK options)
Operating Temperature: 0 to 50°C (32 to 122°F)
Storage Temperature: -40 to 80°C (-40 to 176°F)
Relative Humidity: 0 to 95%, non-condensing
Signal I/O Connector: DB37 male for P1, P2 and P3
Dimensions: 425 W x 220 D x 45 mm H
(16.75 x 8.5 x 1.75")
Weight: 2.3 kg (5 lbs)
Power Available for External DBK Options: 10W
A/D SPECIFICATIONS
Type: Successive approximation
Resolution: 16-bit
Conversion Time: 5 µs
Maximum Sample Rate: 200 kHz
Non-linearity (Integral): ±1 LSB
Non-linearity (Differential): No missing codes
ANALOG INPUTS
Channels
OMB-DAQSCAN-2001, OMB-DAQSCAN-2005:16 single-ended or 8 differential, programmable on aper-channel basis as single-ended or differential andunipolar or bipolar
Expansion: Up to 896 TC channels when used withOMB-DBK90 expansion option (1 ms/channel), or upto 256 channels when used with all other expansionoptions (5 µs/channel)
Settling Time: 5 µsec to 1 LSB for full-scale step
Temperature Coefficient: ±(10 ppm +0.3 LSB)/°C outside the range of 0 to 35°C
Input Impedance:
10 MΩ (single-ended), 20M Ω (differential)
Bias Current: <1nA (0 to 35°C)
Common Mode Rejection: 86 dB, DC to 60 Hz forgains < = 8; >100 dB for gains > = 16
Maximum Input Voltage (Without Damage):±11 V relative to analog common
Over-Voltage Protection: ±35 V
Ranges: Software or sequencer-selectableon a per-channel basis
Crosstalk: -100 dB DC to 60 Hz; 86 dB @ 10 kHz
INPUT SEQUENCERAnalog, digital and frequency inputs can be scannedsynchronously, based on either an internalprogrammable timer or an external clock source.
Scan Clock Sources: 2
1. Internal, programmable from 5 µs to 5.96 hoursin 1 µs steps
2. External, TTL level input up to 200 kHz max:Programmable parameters per scan: Channel (randomorder), gain, unipolar/bipolar
Depth: 16,384 locations
On-Board Channel-to-Channel Scan Rate: 5 or 10 µsper channel, programmable
Expansion Channel Scan Rate: 5 µs, 10 µs, or 1000µsec per channel, programmable
External Acquisition Scan Clock Input
Maximum Rate: 200 kHz
Clock Signal Range: 0 V to 5 V
Minimum Pulse Width: 50 ns high, 50 ns low
External SYNC Port: Available onrear panel, allows multiple DaqScan units to bescan-synchronous (post trigger)
ANALOG OUTPUT (MODELS OMB-DAQSCAN-2001AND OMB-DAQSCAN-2004)The four analog output channels are updated synchronously relativeto scanned inputs, and clocked from either an internal onboard clock oran external clock source. Analog outputs can also be updatedasynchronously, independent of any other scanning in the system.
Channels: 4
Resolution: 16-bits
Data Buffer: 256 Ksample
Output Voltage Range: ±10 V
Output Current: ±10 mA
Offset Error: ±0.0045 V max
Digital Feedthrough: 50 mV when updated
Gain Error: ±0.01%
Update Rate: 100 kHz max,1.5 Hz min (no minimum with external clock)
Settling Time: 10 µsec max to 1LSB for full-scale step
Clock Sources: 4, programmable
1. Onboard D/A clock, independentof scanning input clock
2. Onboard scanning input clock
3. External D/A input clock, independent of external scanninginput clock
4. External scanning input clock
DIGITAL I/O
Channels: 40, expandable up to272 with external digital OMB-DBK options
Input Scanning Modes: 2
1. Asynchronous, under program control at any time relative to inputscanning
2. Synchronous with input scanning
Ports: 3x 8-bit (82C55 emulation), and 1x 16-bit; each port isprogrammable as input or output
Input Protection: ±8 KV ESD clamp diodes parallel
I/O Levels: TTL
Sampling Rate: 200 kHz max
Update Rate: Asynchronous under program control
FREQUENCY/PULSE COUNTERSCounter inputs can be scanned synchronously along with analogand digital scanned inputs, based either on internalprogrammable timer or an external clock source. Counters can beconfigured to clear when read or to totalize and clear under programcontrol.
Channels: 4x 16-bit; cascadable as 2x 32-bit
Frequency Measurement Rate: 10 MHz max
Input Signal Range: -15 V to 15 V
Trigger Level: TTL
Minimum Pulse Width: 50 ns high, 50 ns low
Channels: 4x 16-bit; cascadable as 2x 32-bit
Frequency Measurement Rate: 10 MHz max
Input Signal Range: -15 V to 15 V
