DA100 Data Acquisition Unit (DISCONTINUED)
The DA100 is a member of the DARWIN acquisition family. It is uniquely suitable for compactly configuring a data acquisition environment using a PC as a human interface.
The DA100 is available in two versions, a stand-alone model that can acquire data from up to 40 channels, and an expandable model with a maximum of 300 channels. Both models transfer your measured variables of temperature, flow rates, strain, etc in realtime to a PC via a general purpose communications interface (RS-232-C, RS-422A/RS-485, GP-IB, or Ethernet).
PC-friendly
The PC based data acquisition environment can be easily configured.Economical Excellence
The DA100 units are small and light. A DA100 configuration can additionally greatly reduce the amount of wiring needed, particularly for remote measurements reducing costs.
Highly Functional Expandability
The DA100 can be flexibly configured and expanded to meet a wide range of needs, from small scale data logging to multi-point data acquisition. The data acquisition hardware accepts a wide variety of inputs including: voltage, temperature (thermocouple, RTD), contact, strain, pulse power monitor and direct current (mA) signals.
High Reliability and Environmental Durability
The data acquisition components are made to be highly reliable in extreme environmental conditions
High Speed Measurement
A expandable model configuration can provide a scanning speed of 500 ms/300 channels.
Stand-alone Model
The DA100 stand-alone model occupies little space, and is suitable for small scale data logging. It can be carried about easily.Connect 10 to 40 channels of input modules, as well as one general purpose communication module and 10-channel alarm output modules, directly to the main unit. A combined total of up to five input and output modules can be connected.
- You cannot connect a stand-alone unit to a subunit. If expansion above 40 inputs is a possibility, consider the DA100 expandable model.
- Measurement interval: 500 ms / 40 ch minimum.
Expandable Model
The DA100 expandable model consists of the main unit, subunits and input modules. You can easily configure a multi-channel data acquisition environment by connecting the main unit to several subunits using dedicated cables. You can connect the main unit to subunits over a total distance of up to 500 m using a single dedicated cable, thus reducing the amount of wiring required to perform remote measurement.
- The number of input channels can be increased from 10 to 300 channels in 10-channel increments.
- Measurement interval: As fast as 500 ms.
- Up to six subunits can be connected to one main unit, and up to six input and/or output modules can be connected to each subunit. Subunits can be separated from the main unit by up to 500 m total system cable length.
- Main Unit (DA100-2, for the DA100 expandable model) The main unit acquires data measured by input modules installed on a subunit, and transfers it to a PC in realtime via a general purpose communications module. You can also connect one communications module and up to three alarm modules to the main unit. You cannot connect an input module directly to the main unit.
- Subunit (DS400 or DS600, for DA100 expandable model)
A subunit acts as an interface for connecting the main unit of the DA100 expandable model to one or several input modules. There are two types of subunits, the DS400 which permits connection of up to four input and output modules, and the DS600 which permits connection of up to six input and output modules.
Expandable DA100 Construction
Comparison of Expandable and Stand-alone Models
| Model | Data acquisition unit DA100 | |
| DA100 Stand-Alone Model | DA100 Expandable Model | |
| Features | Integrated construction up to 40 channels. Portable and suitable for small-scale data logging. | Expandable up to 300 channels By connecting subunits to the main unit, you can perform multi-channel measurement with a minimum amount of wiring. |
| Number of input channels Expansion, change | 10 to 40 channels; Channels can be added in increments of 10 channels, and the types of modules are interchangeable. | 10 to 300 channels; Channels can be added in increments of 10 channels, and the types of modules are interchangeable. |
| Input types | Voltage, temperature, contact, power, strain, pulse, direct current (mA) | |
| Main unit I/O connections | Input modules; Communications module; DI/DO module; Alarm output module | (Input module connected to the subunit);Communications module; DI/DO module;Alarm output module |
| Subunit connections and remote measurement distance | Not applicable | Up to six subunits can be connected; 500 m max. |
| Subunit I/O connections | Not applicable | Input module; Alarm output module; DI/DO module |
| Extension module | Available | Available |
| Maximum scanning speed | 0.5 s/all channels | 0.5 s/all channels |
| Alarm contact output modules | Main unit: 10 to 30 points | Main unit: 10 to 30 points Subunits: 10 to 300 points |
| Mathematical operation channels | Max. 30 channels | Max. 60 channels |
Superb Environmental Ruggedness
Every effort has been made in the design of the DA100 to reduce power consumption, thereby minimizing temperature rise. As a result, the unit can be operated over an ambient temperature range of -10°C to 60°C. It can also withstand severe conditions encountered in the field.Complete Channel Isolation and High-voltage Measurement
Channels at the input circuit are fully isolated with high-voltage solid-state relays.*1 The DA100 can withstand a common-mode voltage of up to 250 VAC*2 rms and a withstanding voltage of up to 1500 VAC*2 (for a duration of one minute). These features ensure that the model is even applicable to multi-point measurement in the field.- *1 RTD and pulse inputs share a common line within the same module.
- *2 Depends on module types.
Max. 500 ms/300 Channel High Speed Measurement (expandable model)
Parallel processing of data is used by the dedicated A/D converter inside each input module. 1 Mbps high speed data transfer is accomplished between the main unit and each subunit. Furthermore, the use of a distributed multi-CPU control method for the overall system achieves high speed measurement of data from 300 channels over an interval of 500 ms (the stand-alone model can measure data at the rate of 40 channels/500 ms). The DA100 has a time axis resolution four times that of the previous model (DA2500E), achieving better time synchronization between channels.Space Saving due to Compact Design
The use of high breakdown voltage solid state relays and a planar transformer developed by Yokogawa has enabled the volume of the 60-point input measurement section to be reduced to 1/5* that of previous models. This makes for more efficient use of control room or laboratory space and reduces total costs.This saves space and reduces costs, for example, for panel instrumentation.
Computing Functions (some are optional)
The main unit of the DA100 with optional MATH feature can perform the four arithmetic operations, integration of measured data, and computations such as detection of maximum and minimum values, in realtime. Even without the optional feature, the DA100 can compute linear scaling, difference and moving average. The results of such computations are transferred with the measured data to a PC, thus reducing the system requirements on the PC and also resulting in more efficient analytical processing. The number of computing channels with the MATH option is 30 for the stand-alone model, and 60 for the expandable model.The main computing functions are as follows (the shortest computation period differs depending upon the kind of computation).
- Standard computing functions:
Linear scaling, moving average, differential calculation, pulse integration (when a pulse input module is recognized).
Optional functions:
The four arithmetic operations, logic operations, related operations, calculation of absolute and relative values, and statistical calculations (maximum, minimum, mean, and integrated values for fixed intervals)
Batch Integration
By using the DA100 in combination with the optional DI/DO module or alarm function, you can easily perform batch processing.
Moving Average Function
This function renews the measured value while calculating the moving average, effectively monitoring the trend of a varying input signal over a long period