Yokogawa ALR121-S50 SERIAL COMMUNICATION MODULE

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ALR121-S50 Product datasheet

Model number:	ALR121-S50	Module Type：	SERIAL COMMUNICATION MODULE
Manufacture:	Yokogawa	Condition：	Brand New
Range of Product:	Yokogawa	Lead time：	In Stock
Weight:	0.3 kg	HS CODE：	8537101190
Dimension:	3.2x14.1x13cm	MOQ:	1
Product Origin:	JAPAN	System：	DCS
Discontinued on:	active	Communication Service:	Ethernet router

ALR121-S50 Functional Description

The Yokogawa ALR121-S50 SERIAL COMMUNICATION MODULE delivers critical safety functionality in modern industrial networks using Modbus protocols. This SIL3-certified relay module works seamlessly with ProSafe-RS systems, maintaining rigorous safety standards while enabling efficient Modbus slave communications. Its robust architecture ensures uninterrupted safety operations during all data exchanges between Safety Control Stations and external Modbus master devices.

Engineers benefit from the Yokogawa ALR121-S50 PDF's unique ability to preserve IEC 61508 SIL3 compliance while achieving full plant connectivity. The module's redundant contact design and extended temperature range support reliable operation in demanding environments. These features make it perfect for facilities needing both isolated safety systems and integrated process control.

Installation and maintenance are simplified through the Serial Communication Module ALR121-S50's intuitive LED status indicators and space-saving DIN-rail format. The module's complete electrical isolation protects against interference in complex network environments.

Proven in field applications, the PLCs/Machine Control Yokogawa ALR121-S50 provides trusted safety performance for Modbus-connected systems. It's particularly valuable for emergency shutdowns, combustion control, and other critical functions requiring both safety integrity and data transparency.

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One Year Warranty

We offer a one-year warranty for any quality issues with our products. If you encounter any defects or malfunctions during this period, please contact us for prompt resolution. Our warranty covers repairs or replacements, ensuring your satisfaction and peace of mind.
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MODBUS SLAVE COMMUNICATION FUNCTION

The Modbus slave communication function enhances ProSafe-RS by enabling seamless interaction with external control systems. This feature allows a Safety Control Station (SCS) to operate as a Modbus slave device, establishing standardized communication with third-party Modbus master systems. The architecture supports real-time data exchange while maintaining ProSafe-RS's safety integrity, creating a bridge between the safety system and external PLCs/DCS without compromising reliability.

Key benefits include bi-directional data transfer of process values and diagnostics, simplified system integration, and preserved safety functionality. Typical applications involve integrating safety alarms or process shutdown signals with plant-wide control systems, enabling centralized monitoring while keeping safety logic independent. The implementation maintains ProSafe-RS's certifications (including IEC 61508 SIL3) while adding Modbus RTU/TCP protocol support.

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