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Product Introduction
The Honeywell 2MLF-RD8A-CC RTD Input Module is an industrial-grade temperature sensing module designed to interface with Resistance Temperature Detectors (RTDs) in mission-critical automation systems. Tailored for precise, real-time temperature acquisition, this module supports multiple RTD types and offers highly accurate measurement capability across eight fully isolated channels.
Built for the Modular L-Series platform, the 2MLF-RD8A-CC is engineered to meet the demands of industries such as oil & gas, power generation, pharmaceuticals, and manufacturing. With advanced diagnostics, durable construction, and compatibility with Honeywell’s C300, Experion, and ControlEdge platforms, it ensures consistent thermal monitoring with minimal maintenance.
Product Specifications
| Parameter | Description |
|---|---|
| Product Name | RTD Input Module |
| Model Number | 2MLF-RD8A-CC |
| Manufacturer | Honeywell |
| Input Type | RTD (Resistance Temperature Detector) |
| Supported RTD Types | Pt100, Pt1000, Ni100, Cu50, Cu100 |
| Number of Channels | 8 channels |
| Configuration Support | 2-wire and 3-wire inputs |
| Signal Resolution | 16-bit ADC |
| Measurement Accuracy | ±0.1% of span |
| Measurement Range | -200°C to +850°C (depends on RTD type) |
| Isolation | Channel-to-bus and channel-to-channel |
| Diagnostics | Open wire, short circuit detection |
| Input Impedance | >1 MΩ |
| Conversion Time | 10 ms per channel |
| Noise Rejection | 50/60 Hz |
| 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 |
| Communication Interface | Backplane (L-Series rack system) |
| Mounting Type | DIN rail or Panel Mount |
| Certifications | CE, UL, CSA, RoHS |
| Dimensions | 245 x 87 x 68 mm |
| Weight | 0.34 kg |
Product Applications
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Industrial Process Control: Used in boilers, kilns, dryers, and reactors for thermal control.
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Power Plants: Monitors temperatures in turbine housings, heat exchangers, and electrical cabinets.
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Pharmaceutical & Biotech Facilities: Ensures precise conditions in cleanrooms, incubators, and fermentation tanks.
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Food & Beverage Production: Monitors and controls critical process points like sterilization and pasteurization.
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Oil & Gas Industry: Suitable for high-vibration, high-temperature RTD monitoring offshore and onshore.
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Semiconductor Fabrication: Ensures temperature precision during etching and wafer production.
Product Advantages
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High Channel Density: Eight RTD channels reduce module count in large systems.
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Wide RTD Compatibility: Supports platinum, nickel, and copper RTD elements for versatile integration.
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Robust Diagnostics: Fault detection (e.g., open-wire) built-in for each channel minimizes troubleshooting time.
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Isolated Design: Full isolation between channels improves reliability and reduces ground loop interference.
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Fast Update Rate: Enables real-time thermal monitoring for tight control loops.
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Durability in Harsh Environments: Operates in wide temperature and humidity ranges.
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Modular Architecture: Easily fits into Honeywell’s L-Series control systems without complex wiring.
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Compact Footprint: Ideal for space-constrained panels or distributed remote I/O enclosures.
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Industry Certified: Meets global standards for safety, electromagnetic compatibility, and environmental safety.
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Long Lifecycle Support: Backed by Honeywell’s extensive support infrastructure and lifecycle services.
Frequently Asked Questions (FAQ)
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What is the primary use of the 2MLF-RD8A-CC module?
It is used to read RTD sensor signals for accurate temperature monitoring in industrial environments. -
What types of RTDs are supported by this module?
Supported RTDs include Pt100, Pt1000, Ni100, Cu50, and Cu100. -
Can this module support both 2-wire and 3-wire configurations?
Yes, it is compatible with both configurations, offering installation flexibility. -
Does each channel have electrical isolation?
Yes, the module provides full isolation between each channel and the system bus. -
What happens if an RTD wire breaks?
The module will detect the fault using its open-wire diagnostic feature. -
Is it hot-swappable?
When used with certain Honeywell backplanes that support it, yes. Check system documentation. -
Can it operate in extreme environments?
Yes, it can handle up to 60°C operating temperature and -40°C storage. -
How often does it update the input readings?
Every channel is scanned every 10 milliseconds. -
Is it compatible with Honeywell C300 or Experion systems?
Yes, the 2MLF-RD8A-CC integrates seamlessly with both. -
What certifications does the module hold?
CE, UL, CSA, and RoHS compliant for global industrial use.
Related Models (Same Series or Function)
| Model | Description | Channels | Input Type | Key Feature |
|---|---|---|---|---|
| 2MLF-TC8A-CC | Thermocouple Input Module | 8 | Thermocouple | Precision temperature with TC sensors |
| 2MLF-AI8A-CC | Analog Input Module | 8 | Voltage/Current | For general analog signal acquisition |
| 2MLF-DO16A-CC | Digital Output Module | 16 | Digital | High-speed discrete output control |
| 2MLF-DI16A-CC | Digital Input Module | 16 | Digital | Discrete input detection |
| 2MLF-RD4A-CC | Compact RTD Input Module | 4 | RTD | Space-saving variant of RD8A-CC |
| 2MLF-MIX4A-CC | Mixed Signal Input Module | 4 | AI + DI | Combines analog and digital input types |
Popular Honeywell Models (Same Brand, Other Functions)
| Model | Function | Application | Key Feature |
|---|---|---|---|
| C300 Controller | Process Controller | DCS and hybrid control | Scalable, high-speed process controller |
| HC900-CPU-202 | Hybrid Controller Unit | Industrial automation | Combines logic, loop, and sequencing |
| 51454416-100 | Analog Input Module (AI) | Experion PKS | 8-channel, high-resolution AI module |
| 51199929-100 | Digital Output Module (DO) | Discrete control systems | High-isolation transistor output |
| 51400997-100 | Power Supply Module | Rack power distribution | Redundant and hot-swappable |
| 900C52-0241 | ControlEdge I/O Module | Universal remote I/O | Integrated with ControlEdge PLC |
