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AEG AS-B875-200
- Product Introduction: AEG AS-B875-200 is a high-precision 8-channel analog input module designed for the Modicon 800 series PLC systems, optimized for temperature measurement via thermocouples and direct millivolt (mV) signal acquisition from low-level analog sensors. The module features built-in cold junction compensation (CJC), advanced signal conditioning, full channel-to-channel optical isolation, and wide thermocouple type support, delivering accurate and stable temperature/mV data even in high-noise industrial environments. It supports high-speed sampling, configurable digital filtering, and seamless integration with the Modicon 800 series backplane bus, making it an ideal solution for multi-point temperature monitoring and low-level signal acquisition in chemical processing, food manufacturing, pharmaceutical production, and metalworking applications requiring precise process control.
- Technical Specifications:
- Number of Input Channels: 8 fully isolated channels (thermocouple/mV, software-configurable per channel)
- Supported Thermocouple Types: J, K, T, E, R, S, B, N (8 industrial standards, software-selectable per channel)
- mV Input Range: 0–50 mV, -25–+25 mV (software-configurable, 16-bit resolution)
- Temperature Measurement Range: Dependent on thermocouple type (J: -210°C–+1250°C, K: -270°C–+1372°C, B: 400°C–+1820°C)
Detailed content
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- Resolution: 16-bit, 0.01°C (24 V DC supply), 0.1°C (high-temperature ranges >850°C)
- Measurement Accuracy: ±0.3°C (J/K/T/E @25°C), ±0.6°C (R/S/N @25°C), ±1.0°C (B @25°C) + 0.05% of reading
- Cold Junction Compensation (CJC): Built-in high-precision thermistor, ±0.2°C CJC accuracy, automatic real-time compensation
- Input Impedance: >100 MΩ (ultra-high for mV/thermocouple signals)
- Isolation: 2500 V AC optical isolation (channel-to-channel, channel-to-backplane bus)
- CMRR: >120 dB (@50/60 Hz), >80 dB (@1 kHz)
- Sampling Rate: 10 samples per second (sps) per channel, simultaneous sampling
- Digital Filter: Software-configurable 1st/2nd order filter (0.05–20 s time constant), filter bypass option
- Fault Detection: Automatic open thermocouple detection, overrange/underrange detection, signal loss alarm
- Backplane Interface: Modicon 800 series proprietary bus, 10 Mbps data transfer rate, <1 ms latency
- Power Supply: 24 V DC (18–30 V DC) from PLC chassis, power consumption <2.5 W
- Operating Temperature: -25°C to +70°C
- Storage Temperature: -40°C to +85°C
- Vibration Resistance: 5–50 Hz, 0.5 g acceleration (IEC 60068-2-6)
- Protection Class: IP20 (cabinet-mounted)
- Dimensions: 80 mm (W) × 160 mm (H) × 60 mm (D)
- Weight: 0.7 kg
- Compliance: IEC 61131-2, CE, UL 508, RoHS
- Functional Features:
- 8 fully isolated channels with 2500 V AC optical isolation eliminate ground loops and electrical interference, ensuring accurate signal acquisition in high-noise industrial environments with VFDs, motors, and high-voltage equipment.
- Software-configurable thermocouple/mV input per channel enables mixed signal acquisition (temperature + low-level mV) in a single module, maximizing system flexibility and reducing hardware costs for multi-parameter process monitoring.
- Built-in high-precision CJC with ±0.2°C accuracy delivers reliable cold junction compensation for all thermocouple types, eliminating the need for external CJC modules and ensuring accurate temperature measurements in all environmental conditions.
- 16-bit high resolution and ultra-high input impedance (>100 MΩ) ensure precise acquisition of low-level mV signals and thermocouple outputs, even with long cable runs (100+ meters) in large industrial facilities.
- Configurable digital filtering (0.05–20 s time constant) balances measurement speed and signal stability, adapting to both fast dynamic processes (e.g., chemical reactions) and static temperature monitoring (e.g., storage tanks).
- Automatic fault detection (open thermocouple, overrange, signal loss) triggers real-time alarms to the PLC CPU, enabling immediate system responses to prevent process deviations and equipment damage.
- Simultaneous 10 sps sampling per channel provides real-time temperature/mV data for dynamic process control, with filter bypass option for maximum sampling speed in high-speed monitoring applications.
- Support for 8 industrial standard thermocouple types (J/K/T/E/R/S/B/N) covers all common industrial temperature measurement applications, from low-temperature refrigeration to high-temperature metal smelting.
- Seamless integration with the Modicon 800 series backplane bus enables plug-and-play installation and high-speed data transfer with the PLC CPU, ensuring real-time process control and monitoring.
- Wide operating temperature range (-25°C to +70°C) and vibration resistance ensure reliable performance in harsh industrial environments, including unconditioned control cabinets, metalworking facilities, and chemical processing plants.
- Low power consumption (<2.5 W) reduces the overall power draw of the PLC chassis, complying with industrial energy efficiency standards and minimizing heat generation in control panels.
- Application Scenarios:
- Chemical and petrochemical processing for multi-point temperature monitoring of reactors, distillation columns, and heat exchangers, with accurate measurement of high-temperature reaction processes and low-level mV signals from pressure transducers.
- Food and beverage production for precision temperature control of pasteurization, baking, freezing, and cold storage processes, complying with HACCP standards and ensuring consistent product quality.
- Pharmaceutical manufacturing for temperature monitoring of bioreactors, fermenters, lyophilizers, and sterilization equipment, complying with GMP standards for process traceability and accuracy.
- Metalworking and smelting for high-temperature measurement of furnaces, molds, and welding equipment (up to 1820°C with B-type thermocouples), with stable readings in high-heat industrial environments.
- Power generation for temperature monitoring of turbine bearings, generator windings, and transformer oil, with low-level mV signal acquisition from current transformers and pressure sensors.
- Water and wastewater treatment for temperature and pH sensor (mV output) monitoring of digesters, chemical treatment tanks, and heat exchangers, with noise rejection for industrial plant electrical environments.
- Semiconductor and electronics manufacturing for ultra-precise temperature control of clean room equipment and wafer processing tools, with low-level mV signal acquisition from micro-sensors.
- Glass and ceramic manufacturing for high-temperature measurement of kilns and firing processes, with multi-point monitoring enabling uniform heating and consistent product quality.
