The 1769-IF16C is a high-density analog current input module for Allen-Bradley CompactLogix and MicroLogix 1500 systems. It supports 16 single-ended or 8 differential 4–20 mA/0–20 mA inputs, delivering 16-bit resolution and high-accuracy signal conversion. Onboard filtering and compact 1.5-slot design make it ideal for chemical processing, water treatment, and high-density analog applications.
| Item | Specification |
|---|---|
| Catalog Number | 1769-IF16C |
| Number of Inputs | 16 single-ended / 8 differential (software configurable) |
| Input Range | 0–20 mA, 4–20 mA |
| Resolution | 16-bit (unipolar) |
| Backplane Current Draw | 190 mA @ 5.1 V DC, 70 mA @ 24 V DC |
| ADC Type | Sigma-Delta |
| Input Impedance | 249 Ω |
| Full Scale Error | ±0.2% @ 25 °C |
| Input Filter | Programmable low-pass |
| Common Mode Rejection | >100 dB @ 50/60 Hz |
| Normal Mode Rejection | >45 dB @ 50/60 Hz |
| Isolation Voltage | 30 V AC/DC continuous; tested 500 V DC / 1 s |
| Power Supply Distance Rating | 8 modules |
| Module Width | 1.5 slots |
| Operating Temperature | 0–60 °C |
Differential wiring improves noise immunity and eliminates ground potential errors
Open-circuit detection alerts if a 4–20 mA field wire is broken
Backplane powered; field sensors may require external 24V DC supply
Designed for high-density analog current monitoring in compact PLC racks
Not suitable for voltage signals; use 1769-IF16V or 1769-IF8 for voltage inputs
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