I. Basic Information

Model: cFP-AI-111 (often written as CFP-AI-111)

Manufacturer: National Instruments (NI)

Series: Compact FieldPoint (cFP) I/O

Status: Obsolete

Alternative Model: NI-9208 (C series, 16 channels, 16-bit current input)

Position: 16-channel 4-20mA transmitter acquisition, high-density analog input for industrial process control

II. Core Specifications (16-channel dedicated current)

Number of channels: 16 single-ended analog current inputs

Resolution: 16-bit ADC

Total update rate: 360 Hz (for all channels)

Input range (software selectable):

4–20 mA (most commonly used) 0–20 mA

±20 mA

Accuracy: ±(0.05% reading + 0.05% range)

Input impedance: 5 Ω (for current loop)

Filter (optional per channel): 50 Hz / 60 Hz / 500 Hz (anti-power frequency interference)

Isolation: Channel isolated from the backplane, no inter-channel isolation

Overvoltage protection: 2300 V transient peak (I/O – bus)

Diagnosis: Open circuit / short circuit detection, overrange alarm, onboard linearization

III. Environment and Mechanics

Operating temperature: -40 °C ~ +70 °C (industrial wide temperature range)

Humidity: 10%–90% RH, no condensation

Dimensions: 92 × 60 × 20 mm

Weight: Approximately 115 g

Installation: cFP-BP-4 / BP-8 backplane, hot-swappable

Terminal base: FP-TB-10 (16-pin current-specific)

IV. cFP-AI-100 vs cFP-AI-111 (Key Differences) Table

Comparison item  cFP-AI-100  cFP-AI-111

Number of channels  8 channels  16 channels (doubled density)

Resolution  12 bits  16 bits (higher precision)

Signal type  Voltage + Current  Pure Current (4-20mA optimized)

Filter  Fixed  50/60/500Hz selectable

Typical application  Mixed signal, small-scale  Large-scale 4-20mA transmitter cluster

Replacement for discontinuation  NI-9207  NI-9208

V. Typical application scenarios

Process control high-density acquisition: 16 channels of pressure, flow, level, temperature (4-20mA transducer)

Chemical / water treatment: Multi-parameter monitoring (pH, conductivity, dissolved oxygen)

Energy management: Pulse / analog quantity acquisition of electricity meters, water meters, gas meters

Production line monitoring: Centralized collection of signals from multiple workstations

Combined with cFP-2200/2210/2220: Build a 16-32 channel real-time measurement and control system