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Yokogawa ALR121-S51 Serial Communication Module

Brand/Manufacturer: Yokogawa

Order Number: ALR121-S51

Type: Serial Communication Module

Country of Origin: Sweden

Condition: Original Brand

Lead Time: Available in stock

Payment Term: 100% TT In Advance

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Description

Overview

The Yokogawa ALR121-S51 Serial Communication Module enables reliable serial data exchange across CENTUM VP and other Yokogawa automation networks. It ensures high-speed communication between controllers and field devices, improving overall system efficiency. Moreover, the module features robust industrial design, resisting electrical noise, vibration, and temperature fluctuations, which enhances operational stability. Engineers can integrate this module to maintain continuous communication and reduce system downtime.

Technical Specifications

Parameter Specification
Model Number ALR121-S51
Module Type Serial Communication Module
Communication Protocols RS-232, RS-485
Baud Rate Range 9.6 kbps to 115.2 kbps
Data Bits 7 or 8 bits
Parity None, Even, Odd
Stop Bits 1 or 2
Flow Control None, Hardware (RTS/CTS), Software (XON/XOFF)
Number of Ports 1 configurable serial port
Compatible Systems CENTUM VP, CENTUM CS 3000, ProSafe-RS
Input Voltage 5 V DC from I/O backplane
Power Consumption Approximately 2 W
Operating Temperature 0°C to 55°C
Storage Temperature -20°C to 70°C
Humidity 10–90% RH, non-condensing
Shock & Vibration Compliant with Yokogawa industrial standards
Diagnostic Functions Real-time monitoring, fault detection, communication status logging
Mounting Standard Yokogawa I/O chassis
Isolation Galvanic isolation between communication lines and module circuitry
LED Indicators Status LEDs for power, communication, and error states
Dimensions (H x W x D) 110 mm × 30 mm × 150 mm (typical)
Weight Approximately 0.4 kg
Compliance / Standards CE, UL, RoHS

 

FAQ

A1: What systems are compatible with the ALR121-S51?
Q1: The module works with Yokogawa CENTUM VP, CENTUM CS 3000, and ProSafe-RS systems.

A2: Which serial protocols does the module support?
Q2: It supports both RS-232 and RS-485 protocols for versatile communication.

A3: Can the module operate in harsh industrial environments?
Q3: Yes, it withstands electrical noise, vibration, and temperature fluctuations.

A4: Does the module include diagnostic features?
Q4: Yes, built-in diagnostics enable real-time monitoring and fault detection.

A5: What is the operating temperature range of the module?
Q5: It operates between 0°C and 55°C and can be stored from -20°C to 70°C.

A6: How is the ALR121-S51 installed?
Q6: It is base-mounted and compatible with standard Yokogawa I/O chassis systems.

 

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Testimonials

Fast Delivery, Excellent Quality


We’ve worked with IndustriaX Limited on several urgent orders for automation components. Their ability to provide original, factory-sealed parts with full documentation—often from in-stock inventory—has significantly reduced our downtime. The delivery is consistently fast, and their logistics team is highly responsive. IndustriaX has become one of our most trusted global suppliers for industrial spare parts.

- Sarah Johnson

Reliable Partner for Original Parts


Finding authentic automation parts has always been a challenge, especially for discontinued models. IndustriaX Limited has impressed us with their genuine stock, clear product traceability, and prompt updates. We’ve verified their shipments against OEM specs multiple times, and the results are flawless. They’re now our preferred sourcing partner for critical systems.

- David Smith

Professional Service with After-Sales Support

"IndustriaX Limited doesn’t just ship products—they provide solutions. When we encountered installation issues with one of the modules, their technical team replied in less than 4 hours and provided wiring guides and troubleshooting tips. This level of post-sale support is rare in the spare parts sector. Their professionalism gives us confidence in every order."

- Emily Brown

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We've tested multiple suppliers over the years, but IndustriaX Limited consistently stands out. Their product catalog is extensive, their team is knowledgeable, and they understand the urgency of industrial needs. With every order, we receive timely updates, fast delivery, and 100% genuine products. It’s rare to find such consistency and reliability in this field.

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