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Control Devices for Metering and Batching Equipment
SD-02 Control System
SD-02 control system within a continuous weighing batcher is aimed at providing volumemetric and gravimetric batching of bulk and fluid materials as per setup metrological parameters.
Operation Features
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Basic Parameters for SD-02 Control System within Continuous Weighing Batcher
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Limits of permissible error for batchers as per maximum
performance provided that the batcher operates continuously for at least 6 minutes
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±0.5
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Supply voltage of monophase alternate current with frequency 50.0±0.5, V
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from 187 to 242
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Power demand, W, not exceeding
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50
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Ambient temperature, ºС
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from -10 to +35
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Dust-proof-and-moisture-proof class of the cabinet (as requested)
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IP54 (IP65)
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SD-02 System Provides the Following Functions:
- Manual charge of hopper batchers up to upper lever with batcher actuators stopped
- Charging hopper batchers with preset capacity
- Viewing archives for hour, shift, total run
- Receipt and processing of signals from strain sensors and control of batching device actuators for bulk and fluid material batching through gravimetric and volumetric methods basing on processed data
- Control of several batching devices simultaneously basing on Customer's requirements
- Receipt and processing of digital signals on the motor of agitator and discharge units being ready
- Generating digital signals for control of an agitator, dumping device, for SD-02 control system being ready for operation
- Exchanging data with the upper level computer through interface CAN, RS-485 (Modbus RTU data exchange protocol)
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Design
SD-02 is a modular unit allowing to configure the system as per specific needs of certain equipment for PCS and to be installed into a cabinet. The class of dust and moisture protection of the cabinet is not lower than IP43.
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Operation Features
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Feature
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Acceptable value
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Min
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Nom
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Max
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Features Provided within a Continuous Weigh Hopper
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Maximum performance depending on batcher design, t/h
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0.1
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-
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10.0
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Minimum performance out of NPP, %
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10
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-
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-
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Climatic Variables
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Air pressure, kPa
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84
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-
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107 |
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Relative humidity, %
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30
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-
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80
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Parameters of Digital Inputs
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Low-level voltage, V
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0
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-
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8
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- logical one level, V
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16
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-
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30
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Duration of input signal, ms
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50
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-
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-
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Parameters of Digital Outputs
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Switching voltage, V
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-
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-
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30
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Load current, A
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-
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-
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0.5
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Parameters of Analogue Strain Metering Channel
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Load resistance (from 1 to 4 sensors connected in parallel), Ohm
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95
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380
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-
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Output voltage for sensor feeding, V
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±5.7
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±6.0
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±6.3
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Batcher Operation Principle
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where P - quantity of materials in the bin
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Components of SD-02 Control System
SD-02 Schematic Block Diagram
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