This Honeywell serial communication unit provides essential networking capabilities for modern industrial automation architectures. Primarily, the 2MLL-C22A features two independent channels that support both RS-422 and RS-485 standards. For instance, engineers utilize this module to connect PLCs with variable frequency drives, power meters, or third-party HMI devices. Furthermore, the unit supports a wide range of baud rates from 300 bps up to a maximum of 115200 bps. Additionally, the integrated diagnostics allow for real-time frame monitoring and loop-back testing to ensure network stability. Therefore, this Snet module serves as a versatile bridge for complex multi-vendor environments. Finally, the 2MLL-C22A consumes a nominal 310 mA of current, making it an efficient choice for high-density PLC racks.
The communication settings for this unit are fully configurable via the SoftMaster-NM software for maximum flexibility. Specifically, the 2MLL-C22A supports asynchronous synchronization with data bit options of 7 or 8 bits. Meanwhile, the parity settings include Odd, Even, or None to match the requirements of the slave devices. Regarding network capacity, the module allows for station numbers ranging from 0 to 31, supporting up to 32 stations. Moreover, the hardware facilitates multiple protocols including Modbus RTU/ASCII slave and P2P master modes. Specifically, the transmission distance reaches 15 meters natively and can be extended further using modems or phone lines. Furthermore, the module includes five dedicated LED indicators—RUN, I/F, TX, RX, and ERR—for immediate visual status updates. Consequently, the 2MLL-C22A is engineered to simplify the integration of serial devices into the MasterLogic control logic.
The physical design of this Snet interface emphasizes industrial-grade reliability and ease of monitoring in cabinet environments. For instance, the 2MLL-C22A features built-in network diagnostics such as Auto-scan and Link Monitor for rapid commissioning. Additionally, the module adheres to the standard MasterLogic-200 form factor for effortless mounting on the PLC base. Specifically, the dual-channel layout provides redundancy or the ability to manage two distinct serial networks simultaneously. Meanwhile, the asynchronous transmission mode ensures stable data flow even when connecting to legacy industrial equipment. Furthermore, the robust RS-485 transceiver provides high immunity against electrical noise commonly found on factory floors. Therefore, the 2MLL-C22A delivers consistent communication performance under demanding operational conditions.
Installing the 2MLL-C22A requires precise configuration within the SoftMaster software to establish successful data links. First, ensure the PLC power is turned off before inserting the module into an available communication slot. Specifically, check the alignment of the pins to prevent any physical damage during the seating process. Next, connect the RS-422/485 wiring to the terminal block while observing the correct polarity for TX and RX lines. Furthermore, users must define the baud rate, parity, and station numbers in the SoftMaster-NM configuration tool to match the field devices. Specifically, ensure that the termination resistors are correctly placed if the module is positioned at the end of a long RS-485 segment. Finally, utilize the Frame Monitor tool to verify that data packets are being transmitted and received without errors. For additional MasterLogic components, browse our Honeywell serial modules.
1 x Honeywell 2MLL-C22A Snet Module
1 x Connector Terminal Block
Protective Anti-static Packaging
Shipping Method: Fedex, UPS, DHL
Image Alt Text Recommendation:
Honeywell 2MLL-C22A Snet Module 2-channel serial interface
RS-422 RS-485 wiring terminals on 2MLL-C22A Honeywell module
LED indicators on Honeywell 2MLL-C22A MasterLogic-200 unit
1. How many communication channels does the 2MLL-C22A provide? The 2MLL-C22A features two independent serial channels that can be configured for RS-422 or RS-485 communication.
2. What is the maximum baud rate supported by this Snet module? The module supports high-speed data transmission with baud rates reaching up to 115200 bps.
3. Can the 2MLL-C22A act as a Modbus Master? Yes, the hardware supports P2P services which include both Modbus RTU/ASCII master and user-defined protocol master functions.
4. What do the LED indicators on the front panel signify? The LEDs provide status information for RUN (operation), I/F (interface), TX (transmitting), RX (receiving), and ERR (error).
5. How many stations can I connect to a single 2MLL-C22A network? The module supports a station number setting range from 0 to 31, allowing for a maximum of 32 stations on the network.
| Brand Name | Honeywell |
| Model No. | 2MLL-C22A |
| Product Type | Serial Communication Module (Snet) |
| hasMerchantReturnPolicy | Adjust according to reality |
| Shippingdetails | Adjust according to reality |
