ALR121-SE1

Overview

ALR121-SE1 is a Yokogawa serial communication module with 2 ports, supporting RS-422 point-to-point and RS-485 multipoint connections for industrial communication networks.

Identification

• Product ID: ALR121-SE1

• Model: ALR121 Serial Communication Module

• Type: RS-422/RS-485 Communication Module

• Suffix codes: –S Standard type, E Explosion protection, 1 ISA Standard G

Communication Interfaces

• Interface: RS-422 point-to-point, RS-485 multipoint

• Communication function: Half-duplex

• Synchronization method: Start-stop synchronization

• Transmission speed: 1200, 2400, 4800, 9600, 19200, 38400 bps

• Transmission code: Binary

• Character length: 8 bits (fixed for Modbus slave and subsystem communication)

• Stop bit length: 1 or 2 bits (fixed to 1 bit for subsystem communication)

• Parity check: None, even, odd

• Lag time after data transmission: 1 ms

• Transmission distance: Max 1200 m

Installation & Wiring

• Installation method: Mounted on SSC60, SSC50, SSC10, or SNB10D

• I/O wiring: Cable with 3-pair shield, AKB161 or AKB162

Mechanical Data

• Weight: 0.34 kg

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