Channel & Physical Interface Configuration

• Channel Layout: 16 single-ended analog current input channels, all channels share a public COM ground terminal; no inter-channel galvanic isolation
• Backplane Compatibility: Exclusive for cFP-BP series Compact FieldPoint backplanes, incompatible with standard FP-TB-1 terminal bases
• Front Panel Indicators: Two green LED indicators: POWER for backplane power status, READY for configuration completion
• Mechanical Parameters: Single-width compact FieldPoint form factor, bare module weight 85 g, plastic flame-retardant housing
• Hot Swap Feature: Supports plug/unplug under powered backplane, no data loss or bus crash for adjacent modules

Core Analog Current Input Parameters

• ADC Resolution: 16-bit effective resolution @ 50/60 Hz filter; downgraded to 12-bit @ 500 Hz high-speed filter
• Input Impedance: Fixed 100 Ω shunt resistor for all channels, matched for standard 4-20 mA two-wire transmitters
• Overcurrent Protection: Hardware limited to ±30 mA continuous input, prevents burnout from field wiring short circuits
• Over-Ranging Function: Built-in 5% extended measurement range, e.g. 3.5–21 mA for standard 4–20 mA input, compensates transmitter full-scale drift
• Low-Level Noise: 0.3 μArms input noise with 50/60 Hz filter enabled, suitable for weak current sensor acquisition

Programmable Notch Filter & Update Rate

• 50 Hz Filter: 95 dB power frequency rejection, -3 dB bandwidth 13 Hz, single-channel update cycle 1.23 s
• 60 Hz Filter: 95 dB power frequency rejection, -3 dB bandwidth 16 Hz, single-channel update cycle 1.05 s
• 500 Hz Filter: 60 dB harmonic rejection, -3 dB bandwidth 130 Hz, single-channel update cycle 0.29 s for fast dynamic signals
• Mixed Filter Optimization: Setting unused channels to 500 Hz can shorten overall module polling latency by over 60%

Accuracy & Drift Specifications (-40 ℃ ~ 70 ℃)

• Nonlinearity Error: 0.0015% of full scale, ultra-low linear deviation for precision industrial calibration
• Offset Error: ±0.1 μA initial offset at 25 ℃; ±20 nA/℃ temperature drift
• Gain Error: 0.2% full scale across full temperature range; 40 ppm/℃ gain temperature coefficient
• Effective Resolution: 0.5 μA for 4–20 mA and 0–20 mA ranges; 0.7 μA for ±20 mA bipolar range

Isolation & Safety Compliance

• Isolation Structure: Galvanic isolation between field I/O side and backplane communication bus; no isolation between adjacent input channels
• Transient Withstand Voltage: 2,300 Vrms 5-second transient overvoltage withstand, meets industrial surge protection requirements
• Safety Standards: IEC 61010-1, UL 61010C, CSA C22.2 No.1010.1, Pollution Degree 2 indoor rating
• Altitude Derating: Full performance within 2000 m; isolation voltage must be reduced above 2000 m working altitude

Power Consumption & Environmental Reliability

• Backplane Power Draw: 350 mW typical static power consumption, no additional field-side power supply required
• Operating Temperature: -40 ℃ ~ +70 ℃; Storage Temperature: -55 ℃ ~ +85 ℃
• Humidity Rating: 10%–90% RH non-condensing operation, 5%–95% RH non-condensing storage
• Shock & Vibration: 50 g half-sine operational shock, 5 grms random vibration compliant with IEC 60068 industrial standards
• EMC Certification: CE, FCC Class A, C-Tick, shielded wiring mandatory for EMC compliance

Compatibility Matching List

• Matching Backplanes: cFP-BP-4, cFP-BP-8 Compact FieldPoint backplanes, cannot match standard FP terminal bases
• Network Controllers: cFP-2120, cFP-2220 Compact FieldPoint Ethernet serial controllers
• Official Replacement Model: NI-9208 C-series 16-channel 4-20 mA analog input module
• Official Status: Fully end-of-life, no NI official stock and firmware updates, only aftermarket inventory and third-party repair

Software Compatibility

• Drivers: NI-FieldPoint legacy driver, NI-VISA, NI-DAQmx auxiliary driver
• Configuration Tools: NI MAX, FieldPoint Configuration Utility
• Development Software: LabVIEW 2019 and earlier, LabWindows/CVI
• Supported OS: Windows XP/7/10; no Windows 11 native driver support, incompatible with new LabVIEW versions

Pros & Limitations

• Pros: Wide extreme temperature adaptability, hot-swappable online maintenance, high power-line noise rejection, native 5% over-ranging for transmitter drift, high transient isolation withstand, low static power consumption, distributed remote wiring adaptation
• Limitations: No inter-channel isolation requiring external signal isolators, slow fixed update latency, outdated legacy driver ecosystem, discontinued official firmware maintenance, single-ended only without differential input support

Official Product Images & Visual Reference

• Front Module Render: Grey compact cFP housing, dual front power/ready indicators, rear backplane gold finger connector
• Backplane Assembly Photo: cFP-AI-111 inserted on cFP-BP-8 backplane, complete distributed I/O station layout
• Internal PCB Photo: Onboard shunt sampling resistors, isolated power transformer and notch filter circuit layout
• Document Source: NI official manual 373281B, unwatermarked original factory images and dimensional drawings