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- 1769-IF8
- CompactLogix I/O Module
- USA
- 118 mm × 35 mm × 87 mm
- 2kg
- Xiamen, China
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Technical Report: 1769-IF8 Compact I/O 8-Channel Analog Input Module
1. Product Overview
The 1769-IF8 is a Compact I/O analog input module designed for CompactLogix automation systems. It is used to acquire multiple analog signals from industrial field devices and convert them into digital data for PLC processing.
This module supports 8 differential analog input channels and can handle both voltage and current signals, making it suitable for a wide range of process measurement and industrial control applications.
It is one of the most commonly used analog input modules in Compact I/O architectures due to its balance of channel density, flexibility, and reliability.
2. Brand and Series Information
Brand: Industrial automation control platform ecosystem
Series: 1769 Compact I/O Series
Product Family: Analog Input Modules
Module Type: 8-Channel Voltage/Current Analog Input Module
3. Product Function Description
The 1769-IF8 is responsible for converting analog field signals into digital values that can be interpreted by a PLC system.
Main functions include:
- Receiving 8 differential analog input channels
- Supporting voltage and current signal types
- Converting analog signals into 16-bit digital data
- Providing electrical isolation between field wiring and PLC backplane
- Filtering electrical noise for stable signal acquisition
- Supporting multiple industrial measurement standards
It is widely used in systems where multiple analog signals need to be monitored simultaneously.
4. Technical Parameters
Electrical Specifications
| Parameter | Value |
|---|---|
| Number of Inputs | 8 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 | 120 mA @ 5V DC |
| 24V DC Current | 70 mA |
| Power Dissipation | ~3.6 W |
| Input Impedance | ~220 kΩ (voltage), 250 Ω (current) |
Performance Specifications
| Parameter | Value |
|---|---|
| Resolution | 16-bit (unipolar), 15-bit + sign |
| Conversion Type | Delta-Sigma ADC |
| Accuracy | ±0.2% (voltage), ±0.35% (current) |
| Nonlinearity | ±0.03% |
| Repeatability | ±0.03% |
| Common Mode Rejection | >60 dB |
| Response Speed | Configurable filtering (fast/slow modes) |
Isolation & Protection
| Parameter | Value |
|---|---|
| Isolation Voltage | 500V AC / 710V DC (test) |
| Working Voltage | 30V AC / 30V DC |
| Isolation Type | Channel-to-bus isolation |
| Protection Level | Industrial reinforced insulation |
| EMC Immunity | High industrial noise resistance |
Mechanical Specifications
| Parameter | Value |
|---|---|
| Dimensions (H × W × D) | 118 mm × 35 mm × 87 mm |
| Height with Tabs | 138 mm |
| Width | 35 mm |
| Depth | 87 mm |
| Weight | ~0.75 kg – 2.0 kg (varies by listing) |
| 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 automation environment |
5. Product Advantages
1. High Channel Density
Eight analog input channels in a single compact module reduces cabinet space and wiring complexity.
2. Strong Signal Flexibility
Supports both voltage and current input types, reducing the need for multiple specialized modules.
3. High-Resolution Measurement
16-bit resolution ensures stable and accurate analog signal acquisition.
4. Industrial Noise Resistance
Designed for harsh environments with electrical noise, long cable runs, and VFD interference.
5. Proven Reliability
Widely used in industrial plants, water systems, and manufacturing lines with long operational history.
6. Easy System Integration
Fully compatible with CompactLogix and Compact I/O backplane architecture.
6. Application Areas
The 1769-IF8 is widely used in:
- Industrial automation systems
- Water and wastewater treatment plants
- Chemical process control systems
- HVAC monitoring and control
- Pressure and flow measurement systems
- Pump and motor monitoring systems
- Energy management systems
- General PLC analog signal acquisition
It is especially suitable for medium-scale systems requiring multiple analog inputs.
7. Recommended Models (Same Series / Related Modules)
| Model | Type | Key Parameters | Application |
|---|---|---|---|
| 1769-IF4 | 4-Channel Analog Input | Compact analog acquisition | Small systems |
| 1769-IF16C | 16-Channel Current Input | 4–20 mA process signals | Process control |
| 1769-IF16V | 16-Channel Voltage Input | Multi-sensor voltage input | Monitoring systems |
| 1769-IF4I | Isolated Analog Input | 4-channel isolated input | High-noise environments |
| 1769-OF2 | Analog Output Module | 2-channel output | Control actuators |
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 automation |
| 1769-AENTR | Ethernet Adapter | Dual-port communication | Distributed I/O |
| 1769-SDN | DeviceNet Scanner | Fieldbus master module | Legacy systems |
| 1769-ASCII | Serial Module | ASCII communication | Barcode/printer systems |
9. System Role Summary
The 1769-IF8 acts as a central analog acquisition module in Compact I/O systems. It converts multiple field analog signals into PLC-readable data, enabling process monitoring and control.
Its balance of channel count, accuracy, and cost makes it one of the most widely deployed analog modules in industrial automation.
10. Summary
The 1769-IF8 is an 8-channel analog input module designed for flexible and reliable industrial signal acquisition. It supports both voltage and current signals and provides high-resolution measurement suitable for a wide range of automation applications.
Its key strengths include multi-signal compatibility, stable industrial performance, strong noise immunity, and proven long-term reliability.