IN STOCK YOKOGAWA ALR121 Serial ALR121-S50 Communication Modules (for FIO) Brand New

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ALR121-S50

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Models ALR111 and ALR121 Serial Communication Modules (for FIO) that a field control station (FCS) uses to perform serial communication

with subsystems such as FA-M3. These serial communication modules can be mounted on field control units (AFV30, AFV40,

AFV10, and AFF50), ESB bus node unit (ANB10), optical ESB bus node unit (ANB11), and ER bus node unit (ANR10).

Modbus Communication

Connected device: Serial transmission interface module

Connection method: Connect an ALR111 or ALR121 module communication port with serial transmission interface module

Applicable devices: By Yokogawa - STARDOM FCN, FCJ, and GC1000 Mark II (*1)

By Schneider Electric - Modicon484, 584, 584L, 884, 984, 984A, 984B, 984X, and Micro 84

By Yasukawa Electric - Memocon-SC U84, 584, 684H, 694H, R84H-M, GL60S, and GL20

Transmission protocol: Modbus protocol (RTU mode)

No. of subsystem stations: Max. 30 stations/port

Functional Overview

When the communication function complies, the dual-redundant configuration (*1) can be provided by setting the

serial communication modules to dual-redundant.

Each of the ALR111 and ALR121 modules has two ports; however, the dual-redundant communication requires two communication modules.

The two sets of dual-redundant communication are enabled by two ports of ALR111/ALR121; however, the

communication control is defined by each communication module. When one of the communication ports detects an

error, both ports switch over the control/stand-by sides to the redundant module.

Note that the one-shot write specification cannot be used when dual-redundant communication is set.

Model No examples :

ALR121-S00

ALR121-S01

ALR121-S50

ALR121-S51

ALR121

ALR121 details

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