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- Allen Bradley
- 1769-IR6
- CompactLogix I/O Module
- USA
- 118 mm × 35 mm × 87 mm
- 2kg
- Xiamen, China
- New & In Stock
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Technical Report: 1769-IR6 Compact I/O RTD / Resistance Input Module
1. Product Overview
The 1769-IR6 is a Compact I/O RTD (Resistance Temperature Detector) and resistance input module designed for industrial temperature and resistance signal acquisition in PLC-based automation systems.
It provides 6 independent input channels capable of directly reading RTD sensors or resistance-type signals. The module converts physical resistance values into digital data for processing within CompactLogix or MicroLogix 1500 control platforms.
This module is widely used in precision temperature monitoring applications where stable and accurate resistance measurement is required.
2. Brand and Series Information
Brand: Industrial automation control platform ecosystem
Series: 1769 Compact I/O Series
Product Family: Analog RTD / Resistance Input Modules
Module Type: 6-Channel RTD / Resistance Input Module
3. Product Function Description
The 1769-IR6 is designed to measure resistance-based signals from industrial sensors and convert them into PLC-readable engineering values.
Core functions include:
- 6 independent RTD / resistance input channels
- Supports multiple RTD types (Platinum, Nickel, Nickel-Iron)
- Supports resistance measurement ranges
- Open-circuit and short-circuit detection
- Channel-to-channel configuration flexibility
- LED status indication for diagnostics
- Direct connection to RTD sensors without transmitters
Supported input ranges include:
- 0–150 Ω
- 0–500 Ω
- 0–1000 Ω
- 0–3000 Ω
4. Technical Parameters
Electrical Specifications
| Parameter | Value |
|---|---|
| Number of Inputs | 6 channels |
| Input Type | RTD / resistance |
| Supported RTD Types | Pt 385, Pt 3916, Ni 672, Ni 618, NiFe 518 |
| Resistance Range | 0–150 Ω / 0–500 Ω / 0–1000 Ω / 0–3000 Ω |
| Backplane Current | ~100 mA @ 5.1V DC |
| 24V DC Current Draw | ~35–45 mA |
| Power Dissipation | ~1.5 W |
| Converter Type | Sigma-Delta ADC |
| Common Mode Voltage | ±10V DC max |
Performance Characteristics
| Parameter | Value |
|---|---|
| Resolution | High precision (configuration dependent) |
| Non-linearity | ±0.05% |
| Repeatability | High stability for industrial temperature control |
| Open Circuit Detection | 6 ms to 303 s configurable |
| Signal Filtering | Digital filtering supported |
| Measurement Mode | 2-wire / 3-wire RTD supported |
Isolation & Protection
| Parameter | Value |
|---|---|
| Isolation Voltage | 720V DC for 1 minute |
| Isolation Type | Channel-to-bus optical & magnetic isolation |
| Working Voltage | 30V AC / 30V DC |
| Insulation Class | IEC Class 2 reinforced insulation |
| Input Protection | Open/short circuit detection |
Mechanical Specifications
| Parameter | Value |
|---|---|
| Dimensions (H × W × D) | 118 mm × 35 mm × 87 mm |
| Height | 118 mm |
| Width | 35 mm |
| Depth | 87 mm |
| Weight | ~0.45 kg – 2.0 kg (variant/package dependent) |
| 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 | Industrial rated |
| EMC Protection | High industrial noise immunity |
5. Product Advantages
1. Direct RTD Connection
Allows direct connection of temperature sensors without external transmitters.
2. Multi-Sensor Compatibility
Supports multiple RTD types and resistance ranges, improving application flexibility.
3. High Measurement Stability
Digital filtering and sigma-delta conversion ensure stable readings.
4. Fault Detection Capability
Built-in open-circuit and short-circuit detection improves system reliability.
5. Compact Integration
6 channels in a single module reduces cabinet space.
6. Industrial Noise Resistance
Strong isolation design ensures stable operation in harsh environments.
6. Application Areas
The 1769-IR6 is widely used in:
- Industrial temperature monitoring systems
- Oven and furnace control systems
- Plastic injection molding machines
- Chemical processing plants
- HVAC temperature control systems
- Pharmaceutical production lines
- Food processing temperature monitoring
- Motor and equipment thermal protection systems
It is especially suitable for precision temperature measurement applications.
7. Recommended Models (Same Series / Related Modules)
| Model | Type | Key Parameters | Application |
|---|---|---|---|
| 1769-IF8 | Analog input module | 8-channel voltage/current input | Process signals |
| 1769-IF4 | Analog input module | 4-channel high precision input | Small analog systems |
| 1769-IT6 | Thermocouple input module | 6-channel thermocouple | Temperature measurement |
| 1769-IF16C | Current input module | 16-channel 4–20mA input | Process control |
| 1769-OF4 | Analog output module | 4-channel analog output | Control systems |
8. Other Popular Models (Same Platform – Widely Used)
| Model | Type | Key Parameters | Application |
|---|---|---|---|
| 1769-L33ER | PLC controller | EtherNet/IP CPU | Machine automation |
| 1769-L36ERM | Motion controller | High-speed PLC | Advanced control |
| 1769-AENTR | Ethernet adapter | Dual-port communication | Distributed I/O |
| 1769-SDN | DeviceNet scanner | Fieldbus integration | Legacy systems |
| 1769-ASCII | Serial module | ASCII communication | Barcode / serial devices |
9. System Role Summary
The 1769-IR6 acts as a precision resistance and temperature measurement module in Compact I/O systems. It directly interfaces with RTD sensors and converts physical resistance changes into digital values for PLC processing.
It is essential in industrial systems requiring accurate thermal monitoring and control.
10. Summary
The 1769-IR6 is a 6-channel RTD and resistance input module designed for precise industrial temperature measurement. It offers multi-sensor compatibility, strong isolation, high accuracy, and reliable integration into CompactLogix systems.
Its key strengths include direct RTD connection, high measurement stability, diagnostic capability, and suitability for industrial temperature-critical processes.