Description
2-channel RTD module, resolution 16 bits
Model and Article Information
- Model Number: EM AR02
- Article Number: E 288-3AR02-0AA1
- Description: 2-channel RTD module with a 16-bit resolution for precise temperature measurement.
Physical and Power Specifications
- Dimensions (WxHxD): 47 mm × 100 mm × 81 mm
- Power Consumption: 1.5 W
- Current Consumption:
- SM bus: 120 mA
- 24V DC: 40 mA
Analog Input Specifications
- Number of Inputs: 2
- Measuring Principle: Sigma-Delta (high-precision conversion method)
- Resolution:
- Temperature: 0.1°C / 0.1°F
- Voltage: 15 bits + symbol bits (providing high precision for voltage measurements)
- Max. Voltage Resistance: ±35V (ensuring protection against voltage spikes)
- Max Power Consumption of Sensor: 0.5 mW
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: None specified (common grounding for channels)
- Common Mode Rejection: >120 dB (excellent at rejecting noise from common-mode sources)
- Repeatability: ±0.05% FS (Full Scale)
Cable and Sensor Specifications
- Cable Loop Resistance (Max):
- 20Ω for standard RTD (Cu10), with a maximum of 2.7Ω for special configurations.
- Cable Length: Can handle up to 100 meters with shielded twisted pair cable, ensuring accurate measurements even over long distances.
Diagnosis and Error Handling
- Diagnosis Features:
- Overflow/underflow detection
- Circuit break detection
- 24V DC low voltage warning (ensures proper system operation by notifying of power issues)
Frequency Rejection and Filter Selection
- Rejection Frequency Selection:
- 400 Hz (2.5 ms integration time)
- 60 Hz (16.6 ms integration time)
- 50 Hz (20 ms integration time)
- 10 Hz (100 ms integration time)
- Note:
- When selecting the 400 Hz filter, the module maintains resolution and accuracy, while also suppressing noise at 100 Hz and 200 Hz frequencies.
