Here’s a detailed summary of the Allen-Bradley 1746-NI4(C) analog input module:

 Electrical Specifications

• Type: Analog input module for SLC 500 systems
• Channels: 4 differential analog inputs
• Input Types: User-selectable per channel — voltage (10V DC) or current (20 mA)
• Resolution: 16-bit
• Input Impedance:
  • Voltage: 1 M
  • Current: 250 
• Backplane Current Draw:
  • 25 mA 5V DC
  • 85 mA 24V DC

 Physical & Environmental

• Dimensions: Approx. 24.5 cm × 16.5 cm × 5.5 cm
• Weight: 0.3 kg
• Operating Temp: 0°C to 60°C
• Humidity: 5–95% non-condensing

 Performance & Accuracy

• Voltage Accuracy:
  • 0.284% of full scale 25°C
  • 0.504%  60°C
• Current Accuracy:
  • 0.365% of full scale  25°C
  • 0.642%  60°C
• Drift:
  • Voltage: 63 ppm/°C
  • Current: 79 ppm/°C

 Integration & Features

• Compatible With: SLC 500 chassis (e.g., 1746-A13)
• Wiring: Supports 2-, 3-, and 4-wire analog input devices
• Protection: Overvoltage protection up to 220V DC or AC RMS
• Diagnostics: Input out-of-range detection and fault monitoring