YOKOGAWA Serial Communication Modules ALR121

GENERAL

This document describes about 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).

HARDWARE SPECIFICATIONS

The serial communication modules (ALR111 and ALR121) hardware specifications are as shown below.

Table Serial Communication Module Hardware Specifications

Item Specifications

Model ALR111 ALR121

Interface RS-232C RS-422/RS-485

Connection method Point-to-point Point-to-point (RS-422)

Multipoint (RS-485)

Communication function Half-duplex

Synchronization method Start-stop synchronization

Transmission speed 1200/2400/4800/9600/19200/38400 bps (*1)

Transmission code ASCII/binary

Character length 7/8 bits

Stop bit length 1/2 bits

Parity check None/even/odd

Lag time after data transmission 1 ms (The lag time to start receiving data again after data transmission.)

Transmission distance Maximum 15 m Maximum 1200 m (total extended length)

Installation method Mounted on ANB10, ANB11, ANR10, AFF50, AFV10, AFV30, or AFV40

I/O wiring AKB131, AKB132, AKB133, AKB134 cables, etc. Cable with 3-pair shield, AKB161, or AKB162

Wiring connection D-sub-9-pin (female x 2) Clamped with terminal block’s M4 screws

(5 poles x 2)

Current consumption 0.5A

Weight 0.3 kg 0.3 kg

*1: The applicable transmission speed depends on the communication function, subsystems, and connection method.

An FCS collects data from subsystems or sets data with control calculations to subsystems using the builder functions

by way of serial communication modules. A communication module selects only one communication function, thus

two ports must have identical communication functions. It is not possible to select different communication function

for every port. The communication functions and those transmission speeds for each communication module are as

shown in the table below.

MODEL AND SUFFIX CODES

Description

Model ALR121 Serial Communication Module (RS-422/RS-485, 2 port)

Suffix

Codes

-S Standard type

5 With no explosion protection

E With explosion protection

0 Basic type

1 With ISA Standard G3 option

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