Description
General Information:
- Model Number: SM331 8AI Full Function Type
- Article Number: H7 331-7KF02-0AB0
- Description: 8-channel analog input module for temperature measurement, current input with overcurrent protection, and 14-bit resolution.
Physical Dimensions:
- Dimensions: 40 x 125 x 117 mm
- Power Consumption: 1W (typical)
- Backplane Bus Current: 30mA
- Supply Voltage: DC 24V
- Front Connector: 20-pin
Input Path:
- Standard Input Path Channels: 8
- Resistive Sensor Channels: 4
- Constant Current for Resistive Sensors:
- Resistance Thermometer and Resistance Measurement: 0Ω to 600Ω, 0.8mA
- Resistance Measurement: 0 to 6 kΩ, PTC, and silicon temperature sensors (None)
Input Types and Ranges:
- Supply Voltage:
- ±80mV, ±250mV, ±500mV, ±1V, ±2.5V, ±5V, 1-5V, ±10V
- Current (4-wire):
- ±3.2mA, ±10mA, ±20mA, 0mA to 20mA, 4mA to 20mA
- Current (2-wire): 4mA to 20mA
- Resistor/PTC: 150Ω, 300Ω, 600Ω
- RTD: Pt100, Ni100
- Thermocouple: Type E, N, J, K, L
Basic Error Limitations (at 25°C):
- Supply Voltage: ±0.6%
- Electric Current: ±0.5%
- Resistance: ±0.5%
- Temperature:
- Pt100/Ni100: ±0.5%
- Thermocouple: ±0.7%
Temperature Compensation:
- Internal Temperature Compensation: Supported
- External Temperature Compensation via Compensation Socket: Not Supported
- Temperature Compensation for 0°C Reference Junction: Supported
Interrupt/Diagnosis/Status Information:
- Overrun Interrupt: Channels 0 and 2
- Diagnosis Interrupt: Programmable
- Readable Diagnosis Information: Supported
Resolution:
- Resolution: 13 bits + symbol bits
Electrical Isolation:
- Between Channels: None
- Between Channels and Backplane Bus: Supported
Conductor Length:
- Maximum Length: 200m
- Length at 80mV with Thermocouple: 50m