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Product Introduction
The Honeywell 2MLF-RD8A RTD Input Module is a high-performance input device designed specifically for reading temperature signals from Resistance Temperature Detectors (RTDs). This module is an integral part of Honeywell’s industrial automation systems, including programmable logic controllers (PLCs) and distributed control systems (DCS). It supports multiple RTD types and delivers high-accuracy measurements critical for temperature-sensitive applications in manufacturing, power generation, oil and gas, and process industries.
Built with robust industrial-grade components, the 2MLF-RD8A ensures long-term reliability in harsh environments. It provides eight channels of RTD input, supporting both 2-wire and 3-wire configurations. This module enhances process visibility and enables tighter control over thermal processes, making it an indispensable component in modern industrial automation systems.
Product Specifications
| Parameter | Description |
|---|---|
| Product Name | RTD Input Module |
| Model Number | 2MLF-RD8A |
| Manufacturer | Honeywell |
| Input Type | RTD (Resistance Temperature Detector) |
| Supported RTD Types | Pt100, Pt1000, Ni100, Cu50, Cu100 |
| Number of Channels | 8 |
| Measurement Configuration | 2-wire and 3-wire |
| Resolution | 16-bit ADC resolution |
| Accuracy | ±0.1% of span |
| Input Range | -200°C to +850°C (depends on RTD type) |
| Isolation | Channel-to-bus and channel-to-channel isolation |
| Update Rate | 10 ms per channel |
| Diagnostic Capabilities | Open wire detection, short circuit detection |
| Operating Temperature Range | 0°C to 60°C |
| Storage Temperature Range | -40°C to +85°C |
| Humidity Range | 5% to 95% non-condensing |
| Power Supply Voltage | 24V DC nominal |
| Power Consumption | < 3W |
| Dimensions | 245 x 87 x 68 mm |
| Weight | 0.34 kg |
| Mounting | DIN rail or panel mount |
| Communication Interface | Backplane bus or remote I/O rack |
| Certifications | CE, RoHS, UL/CSA |
Product Applications
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Temperature Monitoring in Process Plants: Ideal for monitoring temperatures in reactors, heat exchangers, and furnaces.
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HVAC and Building Automation: Used to ensure proper temperature control in ventilation and climate systems.
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Food & Beverage Industry: Maintains process temperatures during cooking, fermentation, and cooling.
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Pharmaceutical Manufacturing: Precise temperature control for cleanrooms and chemical reactions.
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Power Generation Facilities: Critical for monitoring boiler temperatures, turbine bearings, and transformers.
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Oil & Gas Sector: Suitable for onshore/offshore operations requiring rugged and accurate temperature input modules.
Product Advantages
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Multi-Type RTD Support: Compatible with a wide range of RTDs for flexible deployment.
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High Accuracy & Resolution: Ensures precision monitoring with minimal error margin.
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Eight Isolated Channels: Enables simultaneous temperature sensing from multiple points.
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Built-in Diagnostics: Features open wire and short circuit detection to reduce downtime.
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Rugged Design: Withstands harsh industrial environments with shock and vibration resistance.
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Flexible Installation: Compact size with DIN/panel mounting support for various enclosures.
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Low Power Consumption: Efficient operation with minimal heat generation.
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Seamless Integration: Easily integrates with Honeywell’s PLC, DCS, and SCADA systems.
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Fast Sampling Rate: Enables real-time temperature monitoring with 10ms update rate.
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Long-Term Reliability: Engineered for continuous operation in mission-critical environments.
Frequently Asked Questions (FAQ)
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What RTD types does the Honeywell 2MLF-RD8A support?
It supports Pt100, Pt1000, Ni100, Cu50, and Cu100 RTDs. -
How many channels does this module have?
It has 8 independent, isolated RTD input channels. -
What kind of configurations are supported — 2-wire or 3-wire?
Both 2-wire and 3-wire configurations are supported. -
Can I use this module with non-Honeywell systems?
It is optimized for Honeywell systems but may integrate with third-party platforms if electrical specifications are met. -
Does the module provide diagnostic features?
Yes, it includes open-wire and short-circuit detection for each channel. -
What is the input range for temperature?
It typically supports -200°C to +850°C, depending on the RTD type. -
Is the module hot-swappable?
This depends on the rack system used. Some Honeywell systems support hot-swap features. -
What kind of mounting is required?
The module can be mounted on DIN rails or directly to panels. -
How is data communicated to the controller?
Through the backplane or a remote I/O bus, depending on the system configuration. -
Is there isolation between the channels?
Yes, it features both channel-to-channel and channel-to-bus isolation for safety and noise immunity.
Related Models (Same Series or Function)
| Model | Description | Channels | Input Type | Key Feature |
|---|---|---|---|---|
| 2MLF-TC8A | Thermocouple Input Module | 8 | TC | High-precision thermocouple input |
| 2MLF-AI8A | Analog Input Module | 8 | Voltage/Current | General-purpose analog input |
| 2MLF-AO4A | Analog Output Module | 4 | Voltage/Current | For analog control output |
| 2MLF-DO16A | Digital Output Module | 16 | Discrete | Relay or transistor output |
| 2MLF-DI16A | Digital Input Module | 16 | Discrete | High-speed digital input |
| 2MLF-RTD4A | RTD Input Module (Compact) | 4 | RTD | Compact version for small systems |
Popular Honeywell Models (Different Functions, Same Brand)
| Model | Function | Application | Key Feature |
|---|---|---|---|
| C300 Controller | Process Controller | DCS Automation | Advanced control and logic processing |
| 51454416-100 | Analog Input Module | Experion PKS Systems | 8-channel analog signal acquisition |
| 51204172-175 | RTD/TC Input Module | Temperature sensing | Dual-input support with diagnostics |
| 51199929-100 | Digital Output Module | Control systems | Isolated digital output |
| 51400997-100 | Power Supply Module | System power distribution | Hot-swappable, redundant-capable |
| HC900-CPU-202 | Hybrid Controller Unit | Hybrid automation | Combines logic, PID, and sequencing |
