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Product Introduction
The Honeywell 2MLL-C22B-CC Serial Communication Module is a robust industrial-grade communication interface engineered to enable seamless integration of serial-connected devices into Honeywell’s Distributed Control Systems (DCS), Modular Control Systems (MLC), and Experion Process Knowledge Systems. Designed for maximum flexibility, this module supports both RS-232 and RS-485 serial communications, allowing plant operators and control engineers to efficiently link a variety of legacy and modern serial devices with their process automation systems.
By bridging the communication gap between advanced Honeywell systems and field devices such as drives, meters, analyzers, PLCs, and other equipment, the 2MLL-C22B-CC ensures consistent and reliable data flow. Its rugged design and adherence to global industry standards make it an ideal choice for deployment in challenging industrial environments where durability and long-term reliability are essential.
Product Specifications
| Parameter | Details |
|---|---|
| Product Name | Honeywell 2MLL-C22B-CC Serial Communication Module |
| Model Number | 2MLL-C22B-CC |
| Communication Ports | 1 x RS-232 / RS-485 switchable port |
| Supported Protocols | Modbus RTU, Modbus ASCII, Honeywell proprietary serial protocols |
| Baud Rate | 300 bps to 115,200 bps |
| Data Bits | 7 or 8 |
| Parity | None, Even, Odd |
| Stop Bits | 1 or 2 |
| Electrical Isolation | 1500 VDC port-to-system isolation |
| Power Supply | 24 VDC nominal (18-30 VDC range) |
| Power Consumption | < 2.5 W |
| Diagnostic Indicators | TX (Transmit), RX (Receive), Status LEDs |
| Configuration | Software-configurable through Honeywell tools |
| EMC / EMI Compliance | EN 61326, CISPR 22 Class A |
| Approvals & Certifications | CE, UL, CSA certified |
| Operating Temperature | -20 °C to +60 °C |
| Storage Temperature | -40 °C to +85 °C |
| Relative Humidity | 5% to 95%, non-condensing |
| Mounting Type | DIN rail or panel mount |
| Dimensions (H x W x D) | 110 x 35 x 120 mm |
| Weight | 0.35 kg |
Applications
The Honeywell 2MLL-C22B-CC module is designed for a wide array of industrial applications where serial communication is required, including:
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Process Control Systems: Integrating flow meters, analyzers, and control valves into DCS networks.
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Power Generation Plants: Communicating with protection relays, meters, and remote I/O devices.
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Building Automation: Linking HVAC systems and energy meters to central controllers.
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Utilities: Connecting SCADA systems with substation devices via RS-485 multi-drop networks.
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Factory Automation: Enabling data exchange between PLCs, barcode readers, vision systems, and variable frequency drives.
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Transportation Systems: Facilitating communication between control systems and field equipment in rail, road, and airport applications.
Product Advantages
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Versatile Communication: Supports both RS-232 and RS-485 for maximum flexibility in device integration.
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Broad Protocol Support: Works with Modbus RTU/ASCII and Honeywell proprietary protocols for seamless communication with a wide range of equipment.
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High Electrical Isolation: 1500 VDC isolation between port and system protects against electrical noise and surges.
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Reliable Performance: Operates in demanding industrial environments with wide temperature and humidity tolerances.
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Compact Footprint: Space-saving DIN-rail or panel mounting reduces cabinet space requirements.
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Advanced Diagnostics: Onboard LEDs provide real-time feedback on communication status, simplifying troubleshooting.
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Low Power Usage: Efficient design ensures low power consumption and minimal heat generation.
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Global Certifications: CE, UL, and CSA approvals guarantee suitability for international installations.
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Long Product Lifecycle: Designed for long-term availability and support within Honeywell’s automation platforms.
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Easy Integration: Fully compatible with Honeywell Experion and MLC systems, reducing engineering and setup time.
FAQ
1. What devices can be connected using the 2MLL-C22B-CC module?
It supports serial devices such as drives, meters, analyzers, barcode readers, printers, PLCs, and legacy field equipment.
2. Does the module support Modbus RTU and ASCII protocols?
Yes, it fully supports both Modbus RTU and Modbus ASCII protocols.
3. What is the electrical isolation rating of this module?
It provides 1500 VDC isolation between the communication port and the system.
4. What is the maximum baud rate supported?
The module supports up to 115,200 bps baud rate.
5. Can I use this module with Honeywell Experion PKS systems?
Yes, it integrates seamlessly with Honeywell Experion PKS as well as MLC systems.
6. How is the module configured?
Configuration is performed through Honeywell engineering tools using the appropriate system interface.
7. Is the module suitable for outdoor use?
The module itself is designed for installation in a protective industrial enclosure; its temperature range supports harsh indoor environments.
8. Does the module support multi-drop RS-485 networks?
Yes, RS-485 multi-drop communication with multiple devices is supported.
9. What is the typical installation method?
It is DIN rail mountable but can also be panel-mounted for flexibility.
10. How are communication errors diagnosed?
Onboard TX, RX, and Status LEDs provide clear visual diagnostics for troubleshooting communication issues.
Related Models (Same Series or Similar Type)
| Model Number | Description |
|---|---|
| 2MLL-C22A-CC | Serial Communication Module, RS-232/RS-485 |
| 2MLL-C23B-CC | Dual-port Serial Communication Module |
| 2MLI-C22A-CC | Isolated Serial Interface Module |
| 2MLL-C32A-CC | Modbus Gateway Serial Communication Module |
| 2MLI-C24B-CC | High-Speed Serial Communication Module |
| 2MLL-C42B-CC | Advanced Serial / Fieldbus Communication Module |
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