Specifications:

• Electrical Characteristics:
• Supply Voltage: 24 V DC.
• Backplane Bus Current: 80 mA (typical).
• Power Loss: 1.8 W (typical).
• Input Protection Limits:
• Voltage: ±35 V.
• Current: up to 40 mA.
• Analog Inputs:
• Channels: 4 differentials.
• Voltage Ranges: ±10 V, ±5 V, ±2.5 V, ±1.25 V.
• Current Ranges: 0–20 mA, 4–20 mA.
• Input Resistance:
• Voltage: ≥1 MΩ.
• Current: Not explicitly listed, but standard for SM 1231 modules.
• Resolution: 15-bit + sign (16-bit total).
• Cycle Time (all channels): Max 100 µs.
• Smoothing: Configurable (None, Low, Medium, High).
• Accuracy & Diagnostics:
• Basic Error (25 °C): ±0.1%.
• Extended Error (up to 55 °C): ±0.3%.
• Diagnostics:
• Wire break detection.
• Supply voltage monitoring.
• Diagnostic alarms.
• LEDs for input status and maintenance.
• Mechanical & Environmental:
• Dimensions (W x H x D): 45 x 100 x 75 mm.
• Mounting: DIN rail.
• Protection Rating: IP20.
• Operating Temp: –20 to +60 °C.
• Storage Temp: –40 to +70 °C.
• Humidity: Up to 95% (non-condensing).
• Shock/Vibration: IEC 60068 compliant.
• Compliance & Approvals:
• CE, UL, CSA, FM, RCM, KC.
• Marine: DNV, LRS, BV, RMRS, ABS.
• ATEX, IECEx.
• Environmental Product Declaration (EPD).
• Global Warming Potential: 43.1 kg CO₂ eq.