Model Interpretation

BADU = Analog Input (Analog Input); 205 = 4-channel RTD (Resistance Temperature Detector) temperature measurement specification; 201 is for single pressure, 202 is bipolar, and 206 is for thermocouple applications. Technical Specifications

Channel Configuration: 4 independent thermal resistance inputs, single-slot Eurocard slot

Sensor Compatibility: PT100 (-200~+600℃), Cu50 (-50~+150℃), supports 2-wire/3-wire RTD system

AD Specifications: 12-bit A/D conversion, temperature measurement comprehensive accuracy ±0.3% FS; single-channel conversion < 80ms (50Hz), < 66ms (60Hz)

Power Supply Parameters: Backplane 5V bus power extraction, module power consumption < 50mA, built-in sensor excitation constant current source, no external temperature measurement power supply required

Dimensions: 58 (W) × 267 (H) × 165 (D) mm, net weight ≈ 0.45kg

Environmental Specifications: Operating 0~60℃, storage - 40~85℃, humidity < 80% RH without condensation, IP20 cabinet installation

Interface and Matching Base

Unified wiring terminal base AS-8535-000, compatible with BADU-201/202/204, B884/B885 full series module bases, 4-channel independent terminal partition.

Core Function

Built-in precise constant current excitation, automatically converts thermal resistance resistance → temperature value; fault diagnosis for open circuit; panel power, channel, fault three-color LED indicators; PLC backplane register direct reading of temperature value, hardware dip switch switching PT100/Cu50 specifications; built-in power frequency filtering, suppresses inverter interference. Applicable scenarios

Chemical tank / pipeline temperature measurement, thermoplastic extruder barrel temperature control, boiler furnace auxiliary machine water temperature collection, HVAC chiller unit temperature measurement, old production line heat treatment furnace temperature monitoring.

Operation and Maintenance

Insert directly into the Modicon Compact standard I/O slot; for temperature measurement deviation, prioritize checking the wiring of the three-wire thermoresistance compensation line; the BADU-201/202 cannot be directly replaced (no constant current source, unable to measure RTD); the same chassis can be mixed with thermocouple card BADU-206 and high-speed counting module B984-101.