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The Yokogawa ALE111-S50, also cataloged as the ALE111 Ethernet Communication Module, serves as the primary ALE111 Product Type utilized to execute real-time data exchange across CENTUM VP and ProSafe-RS platforms. The hardware establishes physical communication links through an IEEE 802.3 10BASE-T half-duplex interface using start-stop synchronization over 100 Ohm twisted-pair unshielded cabling. Operating at a fixed transmission speed of 10 Mbps over a maximum segment distance of 100 m, the module routes field subsystem data directly to node units via standard RJ-45 connectivity.

Suffix Breakdown & Model Matrix

  • ALE111: Base module identifier for the FIO-compatible Ethernet communication module architecture.
  • -S: Designates the standard version configuration.
  • 5: Validates the hardware configuration as having no integrated explosion protection ratings.
  • 0: Indicates the standard basic hardware type.

Hardware Specifications

Parameter Specification
Model ALE111-S50
Brand Yokogawa
Origin Japan
Weight 0.3 kg
Dimensions 3.8 cm x 12.7 cm x 14.0 cm
Operating Temp -20 to +70 deg C
Power Consumption 0.5 A at 5 V DC
Physical Layer Interface IEEE 802.3 10BASE-T, half-duplex
Connector Type RJ-45 (1 port)
Transmission Speed 10 Mbps
Cable Impedance 100 Ohm twisted-pair (non-shielded)
Maximum Distance 100 m per segment
Media Access Control CSMA/CD
Communication Protocols Modbus slave, DNP3 slave, subsystem communication
Bus Compatibility ANB10/ANB11 (ESB bus), ANR10 (ER bus)

Process Control and DCS Instrumentation Features

The module integrates specialized channel-to-channel isolation matrices across its communication interface to decouple field network transients from the internal Field I/O (FIO) subsystem backplane. Protocol handling for Modbus slave and DNP3 slave architectures is executed directly on the embedded processor, minimizing backplane bus latency during high-density cyclic data updates. Furthermore, firmware flash compatibility limits are strictly mapped to system release revisions, requiring specific minimum controller baselines such as AFF50 R3.04+ or AFV10 R3.05+ when mapping data across remote ER bus sub-networks.

Frequently Asked Questions

Q: What are the software version requirements when installing this module into ER bus node units?

A: For proper initialization on ER bus sub-networks, the host node units must run firmware baselines of AFF50 R3.04 or higher, AFV10 R3.05 or higher, or AFG30/40/80 R3.03 or higher.

Q: Can this specific module configuration be deployed inside hazardous areas requiring explosion protection?

A: No, the S50 suffix designates a standard hardware type that lacks intrinsic safety barriers or explosion-proof encapsulation, restricting its installation to general-purpose, non-hazardous industrial environments.

Field Installation Guidelines

  • Baseplate Interfacing: Insert the module into the designated slot of the ANB10, ANB11, or ANR10 FIO baseplate. Press firmly until the top and bottom administrative latches fully engage with the structural bracket.
  • Communication Cabling: Route the 100 Ohm twisted-pair Ethernet cable through dedicated low-voltage wire ways. Maintain physical segregation from high-voltage AC three-phase lines to prevent electromagnetic induction from causing packet drops or CSMA/CD collisions.
  • Grounding Protocol: Ensure that the field control unit rack assembly is bounded directly to a low-impedance safety ground system. The RJ-45 shield must terminate strictly in accordance with the plant distributed control system earthing specifications to prevent ground loop currents.

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