Description
YOKOGAWA ALE111-S50 Product Overview
The YOKOGAWA ALE111-S50 is a high-performance alarm and event processing unit designed for integration with Yokogawa’s CENTUM VP and ProSafe-RS control systems. This advanced module serves as a critical component in industrial safety and process monitoring applications, providing reliable alarm management and event logging capabilities for mission-critical operations.
As part of Yokogawa’s comprehensive safety system portfolio, the ALE111-S50 offers enhanced processing power for handling complex alarm sequences and safety interlocks in demanding industrial environments. Its rugged design ensures stable operation in harsh conditions typically found in oil & gas refineries, petrochemical plants, and power generation facilities.
Technical Specifications
| Parameter Name | Parameter Value |
| Product Model | ALE111-S50 |
| Manufacturer | YOKOGAWA |
| Product Type | Alarm and Event Processing Unit |
| Processing Capacity | Up to 5,000 alarms/sec |
| Event Storage | 50,000 events (standard) |
| Input Channels | 32 digital (configurable) |
| Response Time | <100ms for critical alarms |
| Communication Protocols | Vnet/IP, Ethernet |
| Operating Temperature | -20°C to +60°C |
| Power Supply | 24V DC ±10% |
| Redundancy Support | Yes (with ALE111-S51) |
| Dimensions | 45mm (W) × 130mm (H) × 120mm (D) |
| Certifications | SIL2, IEC 61508 |
Yokogawa ALE111-S50
Main Features and Advantages
The YOKOGAWA ALE111-S50 delivers superior alarm management with its high-speed processing architecture capable of handling up to 5,000 alarms per second. Its advanced event correlation engine reduces nuisance alarms by 40% compared to conventional systems, significantly improving operator response effectiveness.
Key advantages include:
Intelligent alarm filtering and prioritization
Built-in first-out (FO) and root cause analysis
Seamless integration with Yokogawa’s Human Machine Interface (HMI)
Comprehensive diagnostic capabilities with detailed event logging
Hot-swappable design for maintenance without system shutdown
Application Field
The ALE111-S50 is extensively used in:
Safety instrumented systems (SIS) in oil refineries
Critical process monitoring in chemical plants
Turbine protection systems in power generation
Emergency shutdown systems for offshore platforms
Batch process control in pharmaceutical manufacturing
Its robust design makes it particularly suitable for installations requiring high availability and fail-safe operation in classified hazardous areas.
Yokogawa ALE111-S50
Related Products
ALE111-S51: Redundant version for critical applications
ALR111: Alarm annunciator panel
PROSafe-RS: Safety instrumented system
CENTUM VP: Distributed control system
HMI1100: Advanced operator console
Installation and Maintenance
Pre-installation: Verify system compatibility and prepare configuration files using Yokogawa’s engineering tools. Ensure proper grounding and power supply conditioning.
Maintenance: Perform quarterly diagnostic checks and verify event log integrity. Update firmware during planned shutdowns following Yokogawa’s technical bulletins.
Product Guarantee
Yokogawa provides a 36-month warranty for the ALE111-S50, including 24/7 technical support and firmware updates. The unit undergoes rigorous testing to meet international safety standards, ensuring reliable performance in critical applications.
