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Product Introduction
The Honeywell 2MLL-C22B Serial Communication Module is an advanced industrial communication interface designed for seamless integration into Honeywell’s Modular Control Systems (MLC) and Experion platforms. This module provides a reliable and high-performance serial link between control systems and various external devices such as drives, meters, barcode readers, printers, and legacy equipment that require serial communication protocols.
The 2MLL-C22B supports both RS-232 and RS-485 standards, offering flexibility in installation and compatibility with a wide range of serial devices. It is engineered for robust operation in demanding industrial environments and delivers consistent communication performance with advanced error detection and diagnostics capabilities.
Product Specifications
| Parameter | Details |
|---|---|
| Product Name | Honeywell 2MLL-C22B Serial Communication Module |
| Model Number | 2MLL-C22B |
| Communication Ports | 1 x RS-232/RS-485 switchable |
| Communication Protocols | Modbus RTU/ASCII, proprietary serial |
| Baud Rate | 300 bps to 115.2 kbps |
| Data Bits | 7 or 8 |
| Parity | Even, Odd, None |
| Stop Bits | 1 or 2 |
| Isolation Voltage | 1500 VDC |
| Diagnostic LEDs | TX, RX, Status |
| Input Power Supply | 24 VDC nominal |
| Power Consumption | < 2.5 W |
| Operating Temperature | -20 °C to +60 °C |
| Storage Temperature | -40 °C to +85 °C |
| Humidity | 5% to 95% RH, non-condensing |
| EMC Compliance | EN 61326, CISPR 22 Class A |
| Certification | CE, UL, CSA |
| Dimensions (H x W x D) | 110 x 35 x 120 mm |
| Weight | 0.35 kg |
Applications
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Factory Automation: Interfaces PLCs with variable frequency drives (VFDs), sensors, and barcode readers.
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Process Control: Connects DCS systems to metering equipment and analyzers.
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Building Management: Facilitates communication with HVAC controls and energy meters.
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Utilities and Energy: Links SCADA systems to protection relays and substation equipment.
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Legacy Equipment Integration: Bridges new control systems with older serial devices.
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Packaging and Material Handling: Controls and monitors packaging lines and conveyor systems.
Product Advantages
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High Flexibility: Supports both RS-232 and RS-485 standards, accommodating a wide variety of devices.
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Wide Protocol Support: Compatible with Modbus RTU/ASCII and proprietary serial protocols.
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Industrial Durability: Built to perform in extreme environments with wide temperature and humidity ranges.
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Ease of Integration: Plug-and-play with Honeywell MLC and Experion platforms, minimizing engineering efforts.
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Compact Design: Saves valuable panel space in control cabinets.
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Comprehensive Diagnostics: On-board LEDs provide immediate status feedback for troubleshooting.
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High Isolation: 1500 VDC isolation ensures robust noise immunity and protection.
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Low Power Consumption: Energy-efficient operation, reducing heat generation and operational costs.
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Global Compliance: Meets international EMC and safety standards (CE, UL, CSA).
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Long-Term Availability: Backed by Honeywell’s commitment to long product life cycles and support.
FAQ
1. What communication protocols does the 2MLL-C22B support?
It supports Modbus RTU/ASCII as well as proprietary serial protocols.
2. Can this module be used in harsh industrial environments?
Yes, it operates reliably in temperatures from -20 °C to +60 °C and up to 95% non-condensing humidity.
3. Does it support RS-485 multi-drop configurations?
Yes, the module supports RS-485 in multi-drop networks for communication with multiple devices.
4. Is the 2MLL-C22B compatible with Honeywell Experion systems?
Absolutely, it integrates seamlessly with Honeywell Experion and MLC control platforms.
5. What is the maximum supported baud rate?
It supports baud rates up to 115.2 kbps.
6. Are there any diagnostic features on this module?
Yes, it has onboard diagnostic LEDs for TX, RX, and status indication.
7. What power supply voltage is required?
The module requires a nominal 24 VDC power supply.
8. How is electrical isolation handled?
The module provides 1500 VDC isolation to ensure safe and reliable operation.
9. Is firmware upgradeable?
Yes, firmware can be upgraded via Honeywell engineering tools to ensure latest compatibility and features.
10. Can this module be mounted on DIN rail?
Yes, the 2MLL-C22B is DIN rail mountable, allowing flexible installation in standard control cabinets.
Related Models (Same Series or Similar Type)
| Model Number | Description |
|---|---|
| 2MLL-C22A | Serial Communication Module, earlier revision |
| 2MLL-C23B | Dual-port Serial Communication Module |
| 2MLI-C22A-CC | Isolated Serial Interface Module |
| 2MLI-C24B-CC | High-Speed Serial Communication Module |
| 2MLL-C32A | Modbus Serial Gateway Module |
| 2MLI-C42B | Advanced Serial/Fieldbus Communication Module |
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