Bachmann MX213 Product Introduction
1. Product Description
The Bachmann MX213 is a 16-channel high-precision analog input (AI) module integrated into Bachmann’s M1 automation system, engineered for demanding industrial measurement and control applications. As a core sensing interface, it specializes in converting continuous analog signals from sensors (e.g., thermocouples, RTDs, pressure transmitters) into digital data for Bachmann M1 controllers (e.g., M1-CPU-200), enabling accurate monitoring of physical parameters such as temperature, pressure, flow, and voltage in industries like process engineering, energy, pharmaceuticals, and automotive manufacturing.
Unlike standard analog I/O modules, the MX213 features 24-bit ADC resolution, channel-specific signal conditioning, and multi-range input support—delivering laboratory-grade precision in harsh industrial environments. It communicates via the Bachmann Bus (BNet) for deterministic data transfer (sub-1ms latency), critical for time-sensitive processes such as chemical reaction monitoring or power grid load balancing. Its rugged design includes wide-temperature operation, galvanic isolation, and EMI immunity, ensuring reliable performance in settings with extreme temperatures, electrical noise, or vibration.
2. Product Parameters
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Parameter
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Specification
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Product Type
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16-Channel High-Precision Analog Input Module
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Compatibility
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Bachmann M1 Automation System (M1-CPU series controllers)
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Input Channels
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16 x Single-Ended Analog Inputs (configurable per channel)
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Input Signal Types
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Thermocouple (J, K, T, E, R, S, B), RTD (PT100, PT1000), 4–20mA, 0–10V DC, ±10V DC
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ADC Resolution
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24 bits (effective resolution: 22 bits)
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Measurement Accuracy
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±0.01% FS (for 4–20mA/0–10V; at 25°C); ±0.1°C (for PT100, -50°C to +200°C)
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Input Range
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Configurable per channel: 4–20mA (2-wire/4-wire), 0–10V DC, ±10V DC, RTD (–200°C to +850°C), Thermocouple (–270°C to +1820°C)
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Isolation
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Channel-to-channel: 500V AC (1min); I/O to bus: 2500V AC (1min); Power to signal: 1500V AC (1min)
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Sampling Rate
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Up to 1kHz per channel (configurable 1Hz–1kHz)
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Communication Interface
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Bachmann Bus (BNet), 100Mbps (deterministic data transfer)
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Operating Temperature
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-25°C – +60°C
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Storage Temperature
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-40°C – +85°C
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Relative Humidity
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5% – 95% (non-condensing, per IEC 60068-2-3)
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Protection Rating
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IP20 (module); IP40 (when installed in M1 rack)
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Dimensions (W×H×D)
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35mm×100mm×125mm (1U rack height, DIN rail-mountable via M1 rack)
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Mounting Type
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DIN rail-mountable (35mm, per EN 50022) via Bachmann M1 rack
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Certifications
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CE, UL 508, IEC 61131-2, ATEX (Zone 2/22), IECEx
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3. Product Specifications
3.1 Hardware Architecture
- Signal Conditioning & Conversion: Each of the 16 channels includes dedicated signal conditioning circuitry—such as cold-junction compensation (CJC) for thermocouples (accuracy ±0.5°C), excitation current sources for RTDs (1mA/2mA, ±0.1% tolerance), and programmable gain amplifiers (PGA) for low-level signals. The 24-bit delta-sigma ADC (Analog-to-Digital Converter) ensures high resolution, with built-in noise filtering (50Hz/60Hz notch filters and low-pass filters) to suppress electrical interference from industrial equipment.
- Isolation Design: Incorporates three layers of galvanic isolation: channel-to-channel (500V AC) to prevent cross-talk between signals, I/O-to-bus (2500V AC) to protect the M1 controller from high-voltage transients, and power-to-signal (1500V AC) to isolate the module’s internal power supply from input signals. This eliminates ground loops and ensures measurement accuracy even in systems with mismatched ground potentials.
- Communication & Processing: Equipped with a 32-bit ARM Cortex-M7 microcontroller to handle local data processing—including ADC sampling, linearization of thermocouple/RTD signals (per IEC 60751 for RTDs), and scaling of raw data to engineering units (e.g., °C, bar, L/min). It communicates with the M1 controller via BNet, supporting cyclic data transfer (update rate synchronized with sampling rate) and acyclic commands for configuration or diagnostics—reducing the computational load on the central CPU.
3.2 Functional Capabilities
- Channel-Level Configurability: Via Bachmann’s Automation Studio software, each channel can be independently configured for signal type (e.g., PT100 vs. 4–20mA), input range, sampling rate, and filter settings. For example, 8 channels can monitor RTDs for temperature, while the remaining 8 track 4–20mA signals from pressure transmitters—eliminating the need for multiple specialized modules.
- Diagnostics & Fault Handling: Provides real-time diagnostic data per channel, including signal overrange/underrange, open-circuit detection (for RTDs/thermocouples), and ADC error flags. Faults are transmitted to the M1 controller via BNet and trigger front-panel LED alerts (red for critical faults, yellow for warnings). The module also logs the last 200 fault events with timestamps and channel IDs, enabling root-cause analysis for issues like sensor failure or wiring errors.
- Precision Enhancement Features: Includes built-in calibration tools (both factory and user-initiated) to maintain accuracy over time—user calibration can be performed via Automation Studio using a precision signal generator. For thermocouples, advanced CJC algorithms compensate for ambient temperature fluctuations in the module, ensuring measurement accuracy even in environments with variable temperatures (e.g., factory floors with heating/cooling systems).
3.3 Environmental & Mechanical Compliance
- Industrial Durability: Undergoes rigorous testing per IEC 60068 standards, including temperature cycling (-25°C to +60°C, 10 cycles), vibration testing (10–500Hz, 1g acceleration, IEC 60068-2-6), and shock testing (30g acceleration, 11ms half-sine pulse, IEC 60068-2-27). The module’s housing is constructed from flame-retardant ABS plastic (UL 94 V-0), and internal components (e.g., ADC, capacitors) are rated for extended temperature operation (-40°C to +85°C) to withstand extreme conditions.
- EMI/EMC Immunity: Complies with EN 61000-6-2 (industrial immunity) and EN 61000-6-4 (industrial emissions), withstanding conducted interference (10V/m, 80MHz–1GHz) and electrostatic discharge (ESD) up to 8kV (contact discharge) and 15kV (air discharge)—critical for operation near high-power motors, inverters, or radio frequency (RF) sources.
4. Product Features
4.1 Laboratory-Grade Precision in Industrial Settings
With 24-bit ADC resolution and ±0.01% FS accuracy, the MX213 delivers measurement precision comparable to bench-top instruments—enabling applications requiring tight process control (e.g., pharmaceutical batch manufacturing, where temperature tolerance is ±0.5°C).
4.2 Versatile Signal Support
The ability to configure each channel for thermocouples, RTDs, current, or voltage signals eliminates the need for multiple analog input modules, reducing system complexity, inventory costs, and rack space.
4.3 Deterministic Data Transfer
BNet communication ensures sub-1ms latency for sampled data, making the MX213 suitable for time-critical processes such as power plant steam pressure monitoring or chemical reactor temperature control—where delayed data could lead to process inefficiencies or safety risks.
4.4 Robustness for Harsh Environments
Wide-temperature operation (-25°C to +60°C), multi-layer galvanic isolation, and EMI immunity ensure reliable performance in industries like oil & gas (offshore platforms), mining (underground facilities), or steel manufacturing (high-heat environments).
5. Other Bachmann Automation Models
- Bachmann MX224: A 24-channel analog input module with 16-bit resolution, optimized for cost-sensitive applications requiring high channel density (e.g., building automation, HVAC systems).
- Bachmann AO208: An 8-channel analog output module supporting 4–20mA/0–10V signals, designed to control actuators, valves, or variable-speed drives in process control systems.
- Bachmann DIO216: A 16-channel digital I/O module (8 DI + 8 DO) with channel-to-channel isolation, ideal for discrete control tasks (e.g., monitoring limit switches, driving solenoids).
- Bachmann M1-CPU-200: A high-performance M1 controller with a 1.5GHz quad-core processor, dual Ethernet (Profinet/EtherNet/IP), and support for complex control algorithms—compatible with all M1 I/O modules.
- Bachmann TC204: A 4-channel thermocouple input module with specialized cold-junction compensation, optimized for high-temperature monitoring in metal processing or glass manufacturing.
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