Yokogawa AALR121-S00 communication module original

Description

Yokogawa AALR121-S00 – Product Description & Technical Specifications
Product Description
The Yokogawa AALR121-S00 is a high-performance serial communication module designed for seamless integration with Yokogawa CENTUM VP DCS and FIO field control stations. It features dual RS‑422/RS‑485 communication ports, enabling reliable data transmission between the DCS and field devices such as sensors, actuators, and smart instruments. With robust anti‑interference performance, wide compatibility, and long‑distance transmission capability, it is ideal for industrial process control applications including oil & gas, chemical, power generation, and manufacturing automation.
Basic Information
Brand: Yokogawa
Model: AALR121-S00
Product Type: Dual‑Port RS‑422/RS‑485 Serial Communication Module
Weight: Approximately 0.3 kg
Dimensions: Approximately 115 mm × 55 mm × 25 mm, compatible with Yokogawa FIO station slots and standard DIN‑rails
Country of Origin: Japan
HS Code: 8538900000 (for reference)

AALR121-S00

AALR121-S00

Temperature Specifications
Operating Temperature: -10 °C to +60 °C
Storage Temperature: -25 °C to +70 °C
Temperature Drift: Not applicable (communication module)
Input Specifications
Power Input: 10–30 V DC (nominal 24 V DC)Bus Interface: Compatible with Vnet/IP and FIO bus of Yokogawa CENTUM VP DCSCommunication Protocols: RS‑422, RS‑485; supports Modbus, FA‑M3, MELSEC‑A, YS, SLC500 protocolsBaud Rate: 1200, 2400, 4800, 9600, 19200, 38400 bpsTransmission Code: ASCII, binaryCharacter Length: 7/8 bitsStop Bit Length: 1/2 bitsParity Check: None, even, odd
Output Specifications
Communication Ports: 2 × RS‑422/RS‑485 (fully isolated)Transmission Distance: Up to 1,200 m (RS‑422); up to 12,000 m (RS‑485)Max Nodes (RS‑485): 32 nodes per networkData Lag Time: 1 ms after transmissionIsolation Voltage: 1500 V AC (port‑to‑system)
Physical & Environmental Parameters
Isolation: Galvanic isolation between communication ports and system busVibration Resistance: 10–500 HzHumidity: 5%–95% RH (non‑condensing)Protection Level: IP20 (standard)Power Consumption: ≤5 W (full load)
Key Features
Dual isolated RS‑422/RS‑485 ports for flexible field device connection
Wide baud rate range and multi‑protocol support for broad compatibility
Long‑distance transmission (up to 12 km for RS‑485) for large‑scale industrial systems
Robust galvanic isolation for strong anti‑interference and system safety
Seamless integration with Yokogawa CENTUM VP DCS and FIO stations
Compact design, easy installation in FIO slots or DIN‑rails
Stable performance in harsh industrial environments with wide operating temperature range

Yokogawa AALR121-S00 PDF
AALR121-S00

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