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ALE111-S50 S1

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The Yokogawa ALE111-S50 S1 is an interference-free Ethernet communication module designed exclusively for ProSafe-RS Safety Control Stations (SCS), providing reliable 10BASE-T connectivity.
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Technical specifications for ALE111-S50 S1

  • Manufacturer:
    Yokogawa
  • Part Number:
    ALE111-S50 S1
  • Product Family:
    Centum CS-Centum VP
  • Product Type:
    interference-free Ethernet communication module
  • Physical Interface:
    1 x RJ-45 connector
  • Transmission Speed:
    10 Mbps
  • Transmission Distance:
    100 m per segment
  • Cable Type:
    100 ohm twisted-pair cable (unshielded)
  • Connection Method:
    Point-to-point
  • Media Access Control:
    CSMA/CD
  • Current Consumption:
    0.5 A
  • Weight:
    0.24 kg
  • Estimated shipping dimensions:
    3.2x12.5x13cm
  • Tariff Code:
    8537101190
  • Country of origin:
    Japan
  • Place of shipment:
    Xiamen, Fujian, China
By purchasing this item, you agree to the Terms & Conditions, ApterPower is not an authorized distributor for listed manufacturers or tradenames and therefore the manufacturer's warranty does not apply. All our products come with ApterPower's 1-year warranty.

More Information

Overview Manuals Specifications Applications Performance & Efficiency Environmental Ratings

Features:

  • Interference-Free Safety Integration Zero impact on safety loops.
  • Dual-Redundancy for High Availability Automatic failover protection.
  • Versatile Protocol Support Flexible integration with external systems.
The Yokogawa ALE111-S50 S1 is certified as an interference-free module for ProSafe-RS, ensuring that all Ethernet communication activities never compromise the primary safety instrumented functions (SIF) of the control station.

When two Yokogawa ALE111-S50 S1 modules are installed in adjacent slots, the system provides seamless switchover between active and standby modules, preventing single points of failure from disrupting critical plant operations.

The Yokogawa ALE111-S50 S1 supports both Modbus TCP (master/slave) and DNP3 slave communication, enabling direct connection to SCADA systems, third-party PLCs, and Yokogawa STARDOM controllers without additional gateway hardware.

The ALE111-S50 S1 Yokogawa interference-free Ethernet communication modulee may still be available for purchase and support from Apter Power beyond End-Of-Life (EOL) by the manufacturer (OEM).
Yokogawa ALE111-S50 S1 interference-free Ethernet communication module Manuals,Datasheets,Link Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.
Yokogawa ALE111-S50 S1 interference-free Ethernet communication module

General

  • Manufacturer Yokogawa
  • Model ALE111-S50 S1
  • Condition New Original ready stock
  • Product Family ALE111-S50,ALE111-S51,ALE111-SE0
Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.
  • Safety System Integration – Connects ProSafe-RS SCS to external Modbus TCP masters for safe data exchange.
  • Subsystem Data Collection – Acts as Modbus TCP master to gather data from STARDOM FCN/FCJ, GC8000, and FA-M3 controllers.
  • SCADA Communication – Provides DNP3 slave functionality for direct interface with remote monitoring and SCADA systems.
  • Redundant Control Networks – Enables dual-redundant Ethernet communication paths for fail-safe plant operations.
  • Deterministic 10 Mbps Operation – Fixed half-duplex speed ensures predictable communication cycles for safety applications.
  • Low Power Consumption – Draws only 0.5 A, minimizing thermal load on the SCS node unit.
  • Automatic Failover – Dual-redundant configuration provides seamless switching without data loss.
  • Efficient I/O Image Update – Supports up to 2,000 communication data items per SCS across all modules.
  • Interference-Free Design – Certified to have no impact on safety loop integrity.
  • Corrosive Gas Protection – Available with ISA Standard G3 conformal coating (suffix code "1" or "3").
  • Extended Temperature Option – Suffix code "3" includes temperature extension (-20 to 70°C as per ALR121 reference, verify for ALE111).
  • Industrial EMI Immunity – Compliant with ProSafe-RS electromagnetic compatibility standards for heavy industrial environments.
Description
The Yokogawa ALE111-S50 S1 enables a ProSafe-RS Safety Control Station (SCS) to communicate as a Modbus slave, allowing external Modbus TCP masters to read from and write to SCS data. This Yokogawa ALE111-S50 S1 also supports DNP3 slave functionality for integration with SCADA or other remote monitoring systems. With its single RJ-45 port operating at 10 Mbps half-duplex, the module provides deterministic and reliable communication over standard 100-ohm twisted-pair cabling.

Beyond master-slave communication, the Yokogawa ALE111-S50 S1 can act as a Modbus TCP master to interface with various subsystems, including Yokogawa STARDOM FCN/FCJ, GC8000, and FA-M3 controllers. Up to 30 subsystem stations can be connected per Yokogawa ALE111-S50 S1 module, with 128 communication definitions available. This flexibility allows the safety system to integrate seamlessly with third-party PLCs and instrumentation without compromising safety integrity.

The Yokogawa ALE111-S50 S1 features an interference-free architecture, meaning it has no impact on the safety loop of the ProSafe-RS system. For mission-critical applications, the Yokogawa ALE111-S50 S1 supports dual-redundant configurations when two identical modules are installed in adjacent slots. This failover capability ensures continuous data flow and system availability during hardware faults or link failures.
Alternative Names
ALE111-S50 ALE111-S51 ALE111-SE0 ALE111-SE1
Technical notes
The Yokogawa ALE111-S50 S1 requires unit revision U:2 or later and style code S1 to ensure full functionality and compatibility. A single Yokogawa ALE111-S50 S1 module cannot simultaneously perform different types of communication functions (Modbus slave, DNP3 slave, or subsystem communication) on the same port.
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FAQS

The following is a list of questions commonly asked by our customers. Please contact us if you have a question about our process that is not answered below.
What are the primary applications of the Yokogawa ALE111-S50 S1?
The Yokogawa ALE111-S50 S1 is primarily used to connect a ProSafe-RS Safety Control Station (SCS) to external Modbus TCP masters (such as SCADA systems) or to act as a Modbus TCP master for collecting data from subsystems like STARDOM FCN, GC8000, or FA-M3 controllers.
Can the Yokogawa ALE111-S50 S1 be used with CENTUM VP systems?
No. The Yokogawa ALE111-S50 S1 is designed exclusively for ProSafe-RS Safety Control Stations (SCS). For CENTUM VP Field Control Stations (FCS), please refer to other Ethernet communication modules such as the ALE111 variant for FCS applications.
How does the Yokogawa ALE111-S50 S1 handle communication errors?
The module features front-panel LED indicators for link and activity status. When used in dual-redundant configuration, the system automatically switches to the standby module upon detecting a communication failure. Detailed diagnostics can be monitored via the SCS maintenance support tool and system management window.
What is the maximum number of subsystem stations that can connect to one Yokogawa ALE111-S50 S1?
The Yokogawa ALE111-S50 S1 supports up to 30 subsystem stations per module for Modbus TCP communication, with 128 communication definitions available.