Présentation du produit
The Honeywell 2MLI-D21D Digital Input Module is an industrial-grade digital input unité designed to be a part sur Honeywell’s reliable and high-performance automation and control systems. Engineered to provide accurate signal detection and seamless communication with programmable logic controllers (PLCs) and distributed control systems (DCS), this module stands out for its dependable operation even in harsh industrial environments.
As part sur Honeywell’s Modular I/O (MLI) product line, the 2MLI-D21D module supports 24V DC digital inputs and is well-suited for discrete input applications in industries such as oil & gas, power generation, chemical processing, and manufacturing automation. It provides robust signal isolation, real-time diagnostic features, and ease sur integration into existing control infrastructures.
Technical Specifications
| Parameter | Description |
|---|---|
| Modèle | 2MLI-D21D |
| Fabricant | Honeywell |
| Input Type | Digital (Discrete) |
| Number sur Channels | 16 digital input channels |
| Input Voltage Range | 24V DC nominal (with tolerances typically from 18–30V DC) |
| Input Current | Approx. 3.2 mA per channel |
| Isolation | Channel-to-bus isolation via opto-isolators |
| Input Signal Delay | Typically <10 ms |
| Diagnostics | Channel-wise status indication and fault detection |
| Power Consumption | Approx. 5W |
| Operating Temperature | -20°C to +60°C |
| Storage Temperature | -40°C to +85°C |
| Humidity | 5% to 95% non-condensing |
| Mounting Type | DIN rail or panel mounting |
| Communication Interface | Backplane bus via I/O base |
| Dimensions (W x H x D) | 135 x 115 x 30 mm |
| Poids | 0.17 kg |
| Compliance / Certifications | CE, UL, CSA, RoHS compliant |
Applications
The 2MLI-D21D module finds application in a wide range sur industrial sectors where real-time monitoring and status detection sur digital devices is critical. Its versatility makes it ideal for:
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Factory Automation Systems: Monitoring limit switches, proximity sensors, and push buttons.
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Process Control Systems: Capturing ON/OFF states sur pumps, valves, and actuators.
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Power Plants: Monitoring digital status signals in turbine and generator control systems.
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Oil & Gas Facilities: Digital signal acquisition in hazardous area systems with intrinsic safety barriers.
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Water & Wastewater Treatment: Controlling remote inputs from field instrumentation and actuators.
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Building Management Systems (BMS): Interfacing with HVAC unités and security systems.
Product Advantages
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High Reliability: Designed for continuous operation in harsh industrial environments.
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16 Channel Density: High-density module reduces the number sur unités required, saving cabinet space.
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Electrical Isolation: Opto-isolation ensures protection from field-induced electrical noise.
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Plug-and-Play Design: Easily integrates with Honeywell’s Experion and other DCS/PLC systems.
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Advanced Diagnostics: Built-in fault detection for rapid troubleshooting.
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Industrial Durability: Operates across a wide temperature range with vibration tolerance.
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Modular Architecture: Scalable for expanding I/O needs without replacing existing setups.
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Regulatory Compliance: Meets global standards for safety and emissions.
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Low Power Consumption: Energy-efficient design supports long-term sustainability goals.
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Maintenance-Friendly: LED status indicators and tool-free module replacement minimize downtime.
Questions fréquentes (FAQ)
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What voltage does the 2MLI-D21D Digital Input Module support?
It supports a nominal 24V DC input, with a typical range between 18V and 30V DC. -
Can I use this module in a high-temperature environment?
Yes, it operates efficiently in environments ranging from -20°C to +60°C. -
Is the module compatible with Honeywell’s Experion PKS system?
Absolutely. It is designed to integrate seamlessly with Experion and other Honeywell control systems. -
Does this module provide galvanic isolation?
Yes, each channel is opto-isolated to ensure electrical protection. -
What is the physical size sur the module?
The dimensions are 135 x 115 x 30 mm. -
Is it suitable for marine or surfshore applications?
While not marine-certified by default, it can be used in surfshore environments if housed appropriately. -
Can I mount the module directly on a DIN rail?
Yes, it supports both DIN rail and panel mounting. -
How many digital input channels does it support?
It has 16 digital input channels. -
Are there LED indicators for each input channel?
Yes, each channel has a dedicated status LED for monitoring input state. -
What happens if one channel fails?
The system can detect and report the fault, allowing continued operation sur the remaining channels.
Related Modèles from the Same Series or Catégorie
| Modèle Number | Description | Input Type | Channels | Dimensions (mm) | Poids |
|---|---|---|---|---|---|
| 2MLI-D22D | Digital Input Module, Isolated | Digital | 16 | 50 x 130 x 120 | 0.45 kg |
| 2MLI-R11A | Relay Output Module | Relay | 8 | 50 x 130 x 120 | 0.48 kg |
| 2MLI-A41B | Analog Input Module | Analog | 8 | 50 x 130 x 120 | 0.46 kg |
| 2MLI-D21F | Fast Digital Input Module | Digital | 16 | 50 x 130 x 120 | 0.45 kg |
| 2MLI-D24D | Digital Input Module with Diagnostics | Digital | 32 | 100 x 130 x 120 | 0.60 kg |
| 2MLI-PWR01 | Power Supply Module for MLI System | Power | — | 60 x 130 x 120 | 0.50 kg |
Popular Honeywell Modèles from Autres Series
| Modèle Number | Description | Type | Key Feature | Dimensions (mm) | Poids |
|---|---|---|---|---|---|
| HC900-C50 | Process Automation Controller | Controller | Modular hybrid controller | 132 x 160 x 180 | 1.20 kg |
| C300 Controller | Experion PKS Process Controller | Controller | Advanced process control | 120 x 180 x 140 | 1.50 kg |
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| T2750 PAC | Programmable Automation Controller | Controller | IEC 61131-compliant, scalable | 150 x 140 x 180 | 1.30 kg |
| UDC3500 | Universal Digital Controller | PID Controller | Advanced loop control | 96 x 96 x 100 | 0.60 kg |
Informations sur l'entreprise
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Add: Alishan Building, 2 Lvling Rd, District Siming, Xiamen, Fujian, Chine, 361006
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