The Yokogawa ALE111-S50 (S1 Style) is a high-performance communication module designed for the Centum VP and Centum CS 3000 Distributed Control Systems (DCS). This module serves as a critical bridge between the Yokogawa DCS and external subsystems, such as PLCs, gas chromatographs, and other intelligent electronic devices (IEDs). By supporting industrial Ethernet protocols like Modbus/TCP, the ALE111-S50 allows for the seamless integration of third-party equipment into the central control and monitoring architecture.
Product Specifications
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Model Number: ALE111-S50 (S1 Style)
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Module Type: Ethernet Communication Module
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Communication Speed: 10/100 Mbps (Auto-negotiation)
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Ports: Dual-redundant RJ45 Ethernet ports
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Supported Protocols: Modbus/TCP (Master/Slave), general TCP/IP-based communication
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Capacity: Connection up to 30 subsystems (depending on the communication package)
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Isolation: 1500 V AC isolation between communication port and internal circuitry
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Dimensions: 130 mm x 45 mm x 245 mm
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Weight: 0.80 kg
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Country of Origin: Japan
Application Fields
The ALE111-S50 is essential for large-scale industrial integration projects:
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Natural Gas Processing: Integrating flow computers and analysis equipment data into the main control logic.
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Refining & Petrochemicals: Linking independent PLC-controlled package units (e.g., compressor skids, water treatment) to the DCS.
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Power Utilities: Facilitating communication with substation automation hardware and smart protective relays.
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Manufacturing & Food/Bev: Managing data exchange with automated packaging lines and laboratory management systems.
Product Usage Instructions
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Module Mounting: Insert the ALE111-S50 into a compatible I/O node unit (such as the ANB10 or ANB11). Ensure the module is firmly locked using the top and bottom levers to maintain backplane integrity.
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Network Wiring: Use Category 5e (or higher) shielded twisted-pair (STP) cables. In redundant configurations, connect the two ports to independent network switches to eliminate single points of failure.
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Configuration: Define the IP address, subnet mask, and gateway in the Yokogawa “System View” software. Use the “Communication Builder” to map external device registers to the DCS internal data blocks.
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Diagnostics: Monitor the front-panel “RDY” (Ready) and “RCV/SND” (Receive/Send) LEDs. A steady green RDY light confirms the module is healthy; flickering traffic lights indicate active data exchange.
Frequently Asked Questions (Q&A)
Q: Can the ALE111-S50 be used for Vnet/IP communication? A: No, the ALE111 is for communication with external subsystems via standard Ethernet. For internal DCS station-to-station communication, the system uses the Vnet/IP interface built into the CPU or specialized bus coupler modules.
Q: Is it possible to hot-swap this module? A: Yes, if your system is configured for dual-redundancy, you can replace a faulty ALE111 module while the partner module maintains the active communication link.
Q: Does the module support Modbus/RTU? A: The ALE111 is an Ethernet module. For serial Modbus/RTU communication (RS-232/RS-422/RS-485), you should use the ALR111 or ALR121 modules.
Q: How many devices can one ALE111 module poll? A: It can typically communicate with up to 30 subsystems, though the practical limit depends on the volume of data points and the polling frequency required for your process.
Similar Model Recommendations
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Yokogawa ALE111-S51: Version with specialized conformal coating for corrosive environments.
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Yokogawa ALF111-S50: Foundation Fieldbus communication module.
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Yokogawa ALR121-S50: Serial communication module (RS-422/RS-485).
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Yokogawa ALR111-S50: Serial communication module (RS-232C).
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Yokogawa AFV30D: Duplexed Field Control Unit commonly used as the host for communication modules.
