ABB IMASI23 Analog Input Module

Overview

• Versatile analog input module designed for industrial automation
• Provides 16 independently configured analog input channels
• Suitable for monitoring thermocouples, RTDs, millivolts, and current measurements

Technical Specifications

Power Requirements

• Operating Voltage: 5 VDC at 500 mA typical, maximum 750 mA
• Overvoltage Category (IEC 61010-1): I for circuit above 150V, II for circuit below 150V

Analog Input Channels

• Thermocouples: Type B, E, J, K, L, N (14 AWG), N (28 AWG), R, S, T, U, Chinese type E and Chinese type S
• Resistance Temperature Detectors (RTDs): 100 Ω platinum (U.S. Lab. Standard, U.S. Industry Standard, European Standard), 120 Ω nickel, 10 Ω copper, Chinese 53 Ω copper
• Millivolt: -100 mV to +100 mV, 0 to 100 mV
• Voltage: 1 to 5 VDC, 0 to 5 VDC, 0 to 10 VDC, -10 VDC to +10 VDC, or user-specified range within -10 VDC and +10 VDC
• Current: 4 to 20 mA, system or external power

Input Impedance

• Current: 10 MΩ minimum (mV, TC)
• Voltage: 100 kΩ minimum (V, mA)

A-to-D Resolution

• Conversion: 24 bits
• Time: 180 msec for all 16 channels (each channel has dedicated A/D converter)

Accuracy

• Current: 0.02% of full scale range
• High Level Voltage: 0.04% of full scale range
• Low Level Voltage: 0.03% of full scale range
• Resistance: 0.05% of full scale range
• Temperature Effect (0° to 70° C): ± 0.003% of full scale range per degree C maximum

Maximum Lead Wire Resistance Effect

• Voltage:
  • Uncompensated: 1 µV of error per Ω of lead wire resistance
  • Compensated: 0.1 µV of error per Ω of lead wire resistance
• Resistance:
  • Uncompensated: 0.020 Ω error per Ω of lead wire resistance
  • Compensated: 0.008 Ω of error per Ω of lead wire resistance

Input Setting (Time)

• 1.5 seconds to within 1% after full scale step change

Cold Junction Reference Accuracy

• ± 0.5° C

Software Temperature Linearization Accuracy

• ± 0.1° C

Common Mode Isolation

• Channel to Channel and Channel to Logic: 250 VDC/VRMS at 60 Hz
• Rejection (50-60 Hz):
  • Normal Mode: -80 dB minimum
  • Common Mode: -120 dB minimum
• Peak or Continuous Voltage: ± 15 VDC absolute maximum

Electromagnetic Compatibility

• Conducted Transients:
  • Electrostatic Discharge (IEC 61000-4-2, EN 61000-4-2):
    • Contact: ±6 kV
    • Air: ±8 kV
  • Insulation Resistance (100/500 VDC): 100 MΩ N/A
  • Dielectric VAC (45 - 65 Hz) or VDC: 1.4 kV rms/1min. or 1.95 kV DC/1min.
  • Impulse Voltage (1.2/50 µS): ±2.55 kVp ±1 kVp
  • Voltage/Current Surge (1.2/50 µS to 8/20 µS) (IEC 61000-4-5, EN 61000-4-5): ±2 kVP ±1 kVP
  • Fast Transient Bursts (IEC 61000-4-4, EN 61000-4-4): ±2 kVP N/A
  • Damped Oscillatory Wave, 0.1 MHz and 1 MHz (IEC 61000-4-12, EN 61000-4-12): ±1 kVP ±0.5 kVP
  • Ring Wave (IEC 61000-4-12, EN 61000-4-12): ±2 kVP ±1 kVP