Overview: Analog Input Module (IC694ALG223) – 16 Channel, Current

The IC694ALG223 is a 16-channel analog current input module that provides single-ended inputs. Each input can be configured for one of the following ranges using configuration software:

• 4 to 20 mA
• 0 to 20 mA
• 4 to 20 mA Enhanced

Specifications

• Number of Channels: 1 to 16 selectable; single-ended

• Input Current Ranges:

  • 0 to 20 mA
  • 4 to 20 mA
  • 4 to 20 mA Enhanced (selectable per channel)

• Factory Calibration:

  • 4 µA per count on the 4 to 20 mA range
  • 5 µA per count on the 0 to 20 mA and 4 to 20 mA Enhanced range

• Update Rate: 13 milliseconds (for all 16 channels)

• Resolution:

  • At 4 to 20 mA: 4 µA/bit
  • At 0 to 20 mA: 5 µA/bit
  • At 4 to 20 mA Enhanced: 5 µA/bit

• Absolute Accuracy:

  • ±0.25% of full scale @ 25°C (77°F)
  • ±0.5% of full scale over the specified operating temperature range

• Linearity:

  • < 1 LSB from 4 to 20 mA (4 to 20 mA range)
  • < 1 LSB from 100 µA to 20 mA (0 to 20 mA and 4 to 20 mA Enhanced ranges)

• Isolation:

  • Optical isolation: 250 VAC continuous; 1500 VAC for 1 minute
  • Isolation between field and backplane, and frame ground

• Common Mode Voltage: 0 volts (single-ended channels)

• Cross-Channel Rejection: 80 dB from DC to 1 kHz

• Input Impedance: 250 Ohms

• Input Low Pass Filter Response: 19 Hz

• External Supply Voltage Range: 20 to 30 VDC

• External Supply Voltage Ripple: 10%

• Internal Power Consumption:

  • 120 mA from the +5 VDC bus on the backplane
  • 65 mA from a 24 VDC external user power supply (in addition to current loop currents)