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E 200SMART
H7 1200

EM AT08 Thermocouple module

Categories: Temperature Module

Description

8-channel thermocouple module, resolution 16 bits

Model and Article Information

  • Model Number: EM AT08
  • Article Number: E 288-3AT08-0AA1
  • Description: 8-channel thermocouple module with 16-bit resolution for accurate and reliable temperature measurements.

Physical and Power Specifications

  • Dimensions (WxHxD): 47 mm × 100 mm × 81 mm
  • Power Consumption: 1.5 W
  • Current Consumption:
    • SM bus: 50 mA
    • 24V DC: 40 mA

Analog Input Specifications

  • Number of Inputs: 8 channels for thermocouple connections
  • Input Type: Thermocouple (TC)
  • Input Range:
    • Types Supported: E, J, K, N, R, S, T (standard thermocouple types)
    • Voltage Range: ±80 mV (standard voltage range for thermocouple inputs)
    • Data Word Format: Voltage range from -27648 to +27648, providing a wide data range for voltage measurement.

Measuring Principle

  • Measuring Principle: Sigma-Delta (provides high accuracy and stable data conversion from analog to digital)

Resolution

  • Temperature Resolution: 0.1°C / 0.1°F
  • Voltage Resolution: 15 bits + symbol bits (providing high precision in voltage measurement)

Max Voltage Resistance

  • Max. Voltage Resistance: ±35V (ensures the module can withstand voltage spikes without damage)

Isolation and Protection

  • Isolation:
    • Field side and logic side: 500V AC
    • Field side and 24V DC side: 500V AC
    • 24V DC side and logic side: 500V AC
  • Channel-to-Channel Isolation: Supported (each channel is isolated to prevent cross-talk and improve noise immunity)
  • Common Mode Rejection: >120 dB at 120V AC (excellent protection against common-mode noise from electrical interference)
  • Repeatability: ±0.05% FS (Full Scale) for consistent and reliable temperature measurements

Cold Junction Compensation

  • Cold End Temperature Error: ±1.5°C (important for accurate thermocouple readings, as it compensates for the cold junction where the thermocouple leads connect)

Cable and Sensor Specifications

  • Cable Loop Resistance (Max): 100Ω (ensures signal integrity and minimizes measurement errors in the wiring)
  • Cable Length: Up to 100 meters with shielded twisted pair cable (ideal for long-distance applications without significant signal loss or noise interference)

Diagnostic Features

  • Diagnosis Capabilities:
    • Overflow/underflow detection
    • Circuit break detection
    • 24V DC low voltage detection (ensures reliable power supply)