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- Allen Bradley
- 1769-IF4I
- CompactLogix I/O Module
- USA
- 118 mm × 35 mm × 87 mm
- 0.2kg
- Xiamen, China
- New & In Stock
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Technical Report: 1769-IF4I Compact I/O 4-Channel Isolated Analog Input Module
1. Product Overview
The 1769-IF4I is a Compact I/O isolated analog input module designed for industrial automation systems requiring high-reliability acquisition of both voltage and current analog signals.
It provides 4 individually isolated analog input channels, allowing each channel to operate independently without electrical interference between signals. This makes it suitable for harsh industrial environments where ground potential differences and electrical noise are common.
The module converts field analog signals into digital data for PLC processing in CompactLogix-based control systems.
2. Brand and Series Information
Brand: Industrial automation control platform ecosystem
Series: 1769 Compact I/O Series
Product Family: Isolated Analog Input Modules
Module Type: 4-Channel Isolated Voltage/Current Analog Input Module
3. Product Function Description
The 1769-IF4I is responsible for acquiring analog signals from field devices and converting them into PLC-readable data.
Core functions include:
- Receiving 4 independently isolated analog input channels
- Supporting voltage and current signal types
- Converting analog signals into 16-bit digital values
- Providing channel-to-channel and channel-to-bus isolation
- Filtering electrical noise for stable signal acquisition
- Enabling accurate measurement in distributed control systems
It is widely used in systems requiring high signal integrity and electrical separation between field devices.
4. Technical Parameters
Electrical Specifications
| Parameter | Value |
|---|---|
| Number of Inputs | 4 isolated differential channels |
| Input Signal Types | Voltage & Current |
| Voltage Ranges | ±10V, 0–10V, 0–5V, 1–5V |
| Current Ranges | 0–20 mA, 4–20 mA |
| Backplane Current | 145 mA @ 5V DC |
| 24V DC Current | 125 mA |
| Power Dissipation | ~3.0 W |
| Signal Conversion Type | Sigma-Delta ADC |
Performance Specifications
| Parameter | Value |
|---|---|
| Resolution | 16-bit (unipolar), 15-bit + sign (bipolar) |
| Accuracy (Voltage) | ±0.2% full scale @ 25°C |
| Accuracy (Current) | ±0.35% full scale @ 25°C |
| Nonlinearity | ±0.03% |
| Repeatability | ±0.03% |
| Common Mode Rejection | High (>60 dB typical) |
| Conversion Stability | Industrial-grade long-term stability |
Isolation & Protection
| Parameter | Value |
|---|---|
| Isolation Voltage | 500V AC / 710V DC (test) |
| Channel Isolation | Channel-to-channel and channel-to-bus |
| Working Voltage | 30V AC / 30V DC |
| Protection Class | Reinforced industrial insulation |
| EMC Immunity | High industrial noise resistance |
Mechanical Specifications
| Parameter | Value |
|---|---|
| Dimensions (H × W × D) | 118 mm × 35 mm × 87 mm |
| Height with Mounting Tabs | 138 mm |
| Width | 35 mm |
| Depth | 87 mm |
| Weight | 0.20 kg |
| Mounting Type | DIN rail / panel mount |
| Slot Width | 1 slot |
| Terminal Type | Removable terminal block |
Environmental Specifications
| Parameter | Value |
|---|---|
| Operating Temperature | 0°C to 60°C |
| Storage Temperature | -40°C to 85°C |
| Humidity | 5% – 95% non-condensing |
| Vibration Resistance | Industrial IEC standard |
| Shock Resistance | Up to 15G |
| EMC Compliance | Industrial control environment |
5. Product Advantages
1. True Channel Isolation Design
Each input channel is electrically isolated, significantly reducing signal interference and improving reliability.
2. Strong Noise Immunity
Designed for environments with high electrical noise such as factories and heavy machinery systems.
3. High-Precision Signal Conversion
16-bit resolution ensures accurate analog signal measurement for process control.
4. Flexible Signal Compatibility
Supports both voltage and current analog inputs in one module.
5. Enhanced System Safety
Isolation between channels and PLC backplane reduces risk of system damage.
6. Suitable for Distributed Architecture
Works well in modular PLC systems with extended wiring distances.
6. Application Areas
The 1769-IF4I is widely used in:
- Industrial process control systems
- Chemical production monitoring
- Water and wastewater treatment plants
- Oil and gas measurement systems
- HVAC automation systems
- Pressure and flow monitoring systems
- Energy management systems
- High-noise industrial environments requiring signal isolation
It is particularly suitable where signal integrity and electrical separation are critical.
7. Recommended Models (Same Series / Related Modules)
| Model | Type | Key Parameters | Application |
|---|---|---|---|
| 1769-IF4 | Standard Analog Input | 4-channel voltage/current input | Basic analog acquisition |
| 1769-IF8 | Analog Input Module | 8-channel input | Medium process systems |
| 1769-IF16C | Current Input Module | 16-channel 4–20 mA | Process monitoring |
| 1769-IF16V | Voltage Input Module | 16-channel voltage input | Multi-sensor systems |
| 1769-OF2 | Analog Output Module | 2-channel analog output | Control output |
8. Other Popular Models (Same Platform – Widely Used)
| Model | Type | Key Parameters | Application |
|---|---|---|---|
| 1769-L33ER | PLC Controller | EtherNet/IP CPU | Machine automation |
| 1769-L36ERM | PLC Controller | Motion control CPU | Advanced systems |
| 1769-AENTR | Ethernet Adapter | Dual-port communication | Distributed I/O |
| 1769-SDN | DeviceNet Scanner | Fieldbus master module | Legacy integration |
| 1769-ASCII | Serial Module | ASCII communication | Barcode/printer systems |
9. System Role Summary
The 1769-IF4I serves as a high-isolation analog input module within Compact I/O architectures. Its main role is to ensure accurate signal acquisition in environments where electrical noise, grounding issues, or long cable runs could otherwise affect measurement stability.
10. Summary
The 1769-IF4I is a 4-channel isolated analog input module designed for industrial automation systems requiring high signal integrity and electrical separation.
Its key strengths include individual channel isolation, strong noise immunity, high-resolution measurement, and reliable operation in harsh industrial environments.