Allen-Bradley 1769-IF4I CompactLogix 4-Channel Isolated Analog Input Module
The Allen-Bradley 1769-IF4I (Part Number: 1769-IF4I) is a high-precision, 4-channel isolated analog input module designed for the CompactLogix 5370 and MicroLogix 1500 controller platforms. This module is engineered for mission-critical industrial environments where signal integrity is paramount. Unlike standard analog modules, the 1769-IF4I features 750V AC/1060V DC channel-to-channel isolation, preventing ground loops and protecting the system backplane from field-side electrical interference.
Equipped with 16-bit resolution, the 1769-IF4I supports a wide range of voltage and current signals, including 4–20 mA, 0–20 mA, and various bipolar voltage ranges up to ±10V. It allows for both differential and single-ended wiring configurations, making it highly adaptable for complex instrumentation involving flow meters, pressure transmitters, and temperature sensors. Its high-speed conversion rate and high input impedance ensure that rapid process changes are captured with superior accuracy and minimal signal loading.
Hardware parameters and electrical ratings for the 1769-IF4I:
| Parameter | Specification Details |
| Model Number | 1769-IF4I |
| Manufacturer | Allen-Bradley / Rockwell Automation |
| Module Type | Isolated Analog Input (Voltage/Current) |
| Inputs | 4 Individually Isolated Channels |
| Resolution | 16 Bits (Unipolar/Bipolar) |
| Voltage Ranges | ±10V, 0–10V, 0–5V, 1–5V |
| Current Ranges | 0–20 mA, 4–20 mA |
| Isolation Voltage | 750V AC or 1060V DC (Channel-to-Channel) |
| Accuracy | ±0.1% Full Scale @ 25°C |
| Input Impedance | Voltage: >1 MΩ; Current: 250 Ω |
| Step Response | 10 ms to 95% typical |
| Backplane Current | 170 mA @ 5.1V DC; 100 mA @ 24V DC |
| Operating Temp | 0 °C to +60 °C (32 °F to 140 °F) |
| Distance Rating | 8 Modules (Max distance from power supply) |
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