Name: 4E0021.01-90 B&R Control Module ORIGINAL
Price: 1245 CNY
Availability: InStock

Description

4E0021.01-90 verview

The 4E0021.01-90 is a high-performance analog/digital data acquisition module designed for B&R’s automation ecosystem. It serves as a bridge between field sensors/transducers and upper-level controllers (e.g., PLCs, Industrial PCs), enabling reliable collection, conditioning, and transmission of industrial process data in real time.

4E0021.01-90 Hardware Architecture for Data Acquisition

Key components enabling data capture:

Input Channels: 8 universal analog input channels (configurable for 4–20mA, 0–10V, ±10V, thermocouple, RTD) + 4 digital input channels (24V DC, sink/source configurable).

Signal Conditioning Circuitry: Built-in instrumentation amplifiers, low-pass filters, and isolation transformers (2.5kV AC galvanic isolation between channels and system).

16-bit ADC (Analog-to-Digital Converter): Sampling rate up to 1kSps (samples per second) per channel, ensuring high-resolution conversion of analog signals to digital data.

MCU (Microcontroller Unit): Manages channel scanning, data buffering, and communication with the controller via B&R’s POWERLINK/Ethernet POWERLINK protocol.

Power Supply Interface: 24V DC industrial power input (18–30V DC range) with surge protection

3.4E0021.01-90 Data Acquisition Workflow

The module implements data collection through a sequential, deterministic process:

3.1 Signal Sensing & Input

Field devices (e.g., pressure sensors, temperature transducers, limit switches) connect to the module’s terminal blocks via shielded cables.

Analog signals (e.g., 4–20mA current from a flow sensor) or digital signals (e.g., on/off status from a proximity switch) are fed into corresponding channels.

Polarity detection and overvoltage protection circuits prevent module damage from incorrect wiring or signal spikes.
3.2 Signal Conditioning

Amplification: Weak analog signals (e.g., millivolt-level thermocouple outputs) are amplified to match the ADC’s input range (0–5V).

Filtering: Low-pass filters (configurable cutoff frequency: 10Hz–1kHz) eliminate high-frequency electromagnetic interference (EMI) from industrial environments.

Isolation: Galvanic isolation separates field signals from the module’s internal circuitry, suppressing ground loops and noise.

3.3 Analog-to-Digital Conversion

The 16-bit ADC converts conditioned analog signals into digital values (range: 0–65535 for unipolar signals, ±32768 for bipolar signals).

Sampling is triggered by:

Cyclic Scanning: Continuous sampling at a user-configurable rate (10Hz–1kSps) for real-time monitoring.

Event Trigger: Sampling initiated by a digital input edge (e.g., a sensor alarm) or a command from the controller.

Converted digital data is temporarily stored in a 4kB buffer to prevent data loss during high-speed acquisition.

3.4 Data Processing & Validation

The MCU performs built-in data validation:

Range checks (flags out-of-limit values per user-defined thresholds).

Error detection (identifies open circuits, short circuits, or signal loss).

Linearization (corrects non-linear sensor outputs via preloaded calibration curves).

Validated data is formatted into B&R’s standard process data objects (PDOs) for protocol compatibility.

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