Technical Specifications
Main Features and Advantages
The YOKOGAWA ALR121-S53 stands out through its unique integration of a modem interface, which provides a significant advantage for long-distance communication. This feature allows the CENTUM VP system to extend its reach to remote sites, such as pipelines, unmanned substations, and distant pump stations, where direct Ethernet or bus wiring is impractical. The module’s primary function is to provide redundant serial communication. When used in a redundant pair, the ALR121-S53 modules offer an active-standby failover, ensuring that if one unit or its communication link fails, the other automatically takes over without any loss of data. This is critical for maintaining control and monitoring of remote, high-value assets. Additionally, the module’s support for multiple serial protocols (RS-232, RS-422, RS-485) and its dual ports provide immense flexibility for connecting a variety of third-party devices. Its deep integration with the CENTUM VP system simplifies configuration and diagnostics, as all parameters can be managed through the standard engineering tools. The on-board diagnostic LEDs provide immediate visual feedback on the health of the communication channels, which is essential for troubleshooting issues in remote locations.
Application Field
The YOKOGAWA ALR121-S53 module is an indispensable component in industries that manage geographically dispersed assets, particularly where direct wired communication is not feasible. Its main areas of application are in sectors such as oil and gas, pipeline operations, utilities, and remote water and wastewater management. In these fields, the ALR121-S53 serves as a vital link, connecting the central CENTUM VP DCS to a variety of remote equipment, including telemetry units, remote terminal units (RTUs), and specialized monitoring devices. For example, in a long-distance pipeline network, a redundant pair of ALR121-S53 modules could be used to communicate with RTUs at various pump stations, ensuring that the control system always receives critical data on flow, pressure, and equipment status. The redundancy ensures that even if a modem link fails, the standby link will take over, preventing any communication loss. This module is an excellent solution for integrating remote sites into a centralized control system, solving the challenge of managing distant assets with high reliability.
Related Products
ALR121-S50: This is the redundant serial communication module, but it does not include the modem interface of the ALR121-S53, making it suitable for local, direct serial connections. ALR121-S51: This module provides redundant serial communication with built-in surge protection, but it does not have the modem interface of the ALR121-S53, making it ideal for electrically noisy local environments. ALR121-S00: The standard, non-redundant serial communication module for CENTUM VP. AFV30S: The Field Control Unit (FCU) for the CENTUM VP system, which serves as the host for the ALR121-S53 module. ANB10: An ESB Bus Node Unit that can house the ALR121-S53 module, allowing for the extension of serial communication from the main Field Control Unit.
Installation and Maintenance
Pre-installation preparation: Before installing a pair of YOKOGAWA ALR121-S53 modules, ensure that the CENTUM VP Field Control Station (FCS) is completely de-energized. The system software must be compatible with the module’s firmware. For redundant installations, place both ALR121-S53 modules in adjacent slots as specified in the manual. Prepare the necessary serial cables and configure the modules for the correct protocol and communication parameters. It is also essential to correctly configure the external modem and ensure it is compatible with the module.
Maintenance recommendations: Routine maintenance for the ALR121-S53 modules primarily involves software diagnostics and network health checks. Use the CENTUM VP’s monitoring functions to check the communication status and performance of the serial links. The on-board LED indicators on each ALR121-S53 provide a quick visual check of its operational status and any communication errors. In the event of a failure, the system will automatically switch to the standby unit, but the failed ALR121-S53 module must be replaced promptly to restore full redundancy. When replacing a module, follow the hot-swapping procedure as outlined in the manual to minimize system interruption. For physical care, use a soft, dry cloth to remove dust and avoid using liquid cleaners.
Product Guarantee
Yokogawa’s commitment to quality and reliability is reinforced by the comprehensive product guarantee for the ALR121-S53. Each module is manufactured to the highest standards, ensuring its performance and longevity in the most demanding industrial environments. The product is backed by a warranty that covers manufacturing defects, providing customers with confidence in their investment. In addition to the standard warranty, customers have access to Yokogawa’s global network of expert technical support, which is available to assist with all aspects of the module’s operation, from initial installation to troubleshooting and system optimization. This commitment to robust after-sales service and technical expertise ensures that users can rely on the performance and durability of the ALR121-S53 to maintain the stability and efficiency of their mission-critical automation systems.
AMAT PART #0200-20074 DOOR PRECLEAN CHAMBER QUARTZ
AMAT PART # 0020-24435 INSULATOR QUARTZ 8″
PARKER THREE WAY VALVE MODEL # 955Y3NC
THREE WAY VALVE AMAT PART # 3870-02221
NOVELLUS ANALOG INPUT PCB SLOT 6 PART # 19-00126-00
AMAT PART # 0200-35539 200mm BLADE ROBOT QTZ w/RADIUS
AMAT ENDURA COVER RING PART # 0020-24804
CENTURA SLIT VALVE DOOR PART # 0021-09922
AMAT PART # 0200-10455
NOVELLUS THERMOCOUPLE UNIT PART # 03-10411-00
LAM ESC POWER SUPPLY DISTR. PCB PART # 810-370141-001
