Description
General Information:
- Model Number: SM 1231 AI4 x 16 Bits
- Article Number: H7 231-5ND32-0XB0
- Description: Analog input module with 4 inputs, each 16 bits wide, capable of handling voltage or current signals.
- Conventional Norm: Not specified (typically follows industry-standard norms).
- Dimensions:
- Width: 45 mm
- Height: 100 mm
- Depth: 75 mm
- Power Consumption: 2W
- Current Consumption (SM bus): 80 mA
- Current Consumption (24V DC): 65 mA
Analog Input Specifications:
- Number of Inputs: 4
- Input Type: Voltage or current (differential)
- Input Range:
- Voltage: ±10 V, ±5 V, ±2.5 V, ±1.25 V
- Current: 0–20 mA or 4–20 mA
- Full-Scale Range (Data Word):
- Range: -27,648 to +27,648 (15 bits of precision, plus sign bit)
Signal Overshoot/Undershoot Range:
- Voltage:
- ±32,511 to -27,649 or -27,649 to -32,512
- Current:
- 0–20 mA: ±32,511 to -27,649 or 0 to -4,864
- 4–20 mA: ±32,511 to -27,649 or -1 to -4,864
Overflow/Underflow (Data Word):
- Voltage:
- Overflow/Underflow: ±32,767 to -32,512 or -32,513 to -32,768
- Current:
- 0–20 mA: Overflow/Underflow: ±32,767 to -32,512 or -4,865 to -32,768
- 4–20 mA: Overflow/Underflow: ±32,767 to -32,512 or -4,865 to -32,768
Data Format:
- Format: 15 bits + 1 sign bit (16-bit word, where the first bit indicates the sign of the input value)
Electrical Characteristics:
- Max. Voltage/Current Resistance:
- Voltage: ±60V
- Current: ±40mA
- Smoothness (Signal Filtering):
- None, weak, medium, or strong (for noise suppression)
- Noise Suppression:
- Configurable to 400 Hz, 60 Hz, 50 Hz, or 10 Hz
- Isolation (Field Side and Logic Side): None (direct connection without isolation)
- Working Signal Range:
- Signal plus common mode voltage must be less than +12V and greater than -12V.
- Precision (25°C / 0–55°C):
- Full range: ±0.1% (typical)
- Full range: ±0.3% (maximum)
Diagnostic Features:
- Overflow/Underflow Detection: Supported
- Circuit Breaker (Current Mode Only):
- For 4–20 mA range, if the input value drops below -4,164 (1.0 mA), the circuit will be broken.