Product Description

Overview

The Yokogawa ALR111‑S51 communication module is a high-reliability RS‑232 interface designed for industrial automation systems. It enables stable serial communication between Field Control Station (FCS) subsystems and external devices, including FA‑M3 PLCs and CENTUM VP controllers. Moreover, its flexible configuration options ensure seamless integration into complex control networks, while its compact design allows easy installation in standard control cabinets.

Technical Specifications

• Model Number: ALR111‑S51

• Type: RS‑232 Communication Module

• System Compatibility: Yokogawa FCS / CENTUM VP / FA‑M3 subsystems

• Interface: RS‑232C

• Communication Mode: Half-duplex, point-to-point

• Protocols Supported: Modbus, subsystem protocols

• Baud Rate: Configurable (300–19,200 bps)

• Parity Options: None, Odd, Even

• Diagnostics: Built-in communication error detection

• Dimensions (H × W × D): 12.7 × 5.1 × 12.7 cm (5.0 × 2.0 × 5.0 in)

• Weight: 0.3 kg (10.1 oz)

• Operating Temperature: 0 °C to +55 °C

• Storage Temperature: –20 °C to +75 °C

• Humidity Range: 10–90% RH, non-condensing

• Certifications: CE, UL, CSA

• Country of Origin: Japan

FAQ

Q1: Which devices are compatible with this module?
A: It works with Yokogawa FCS, CENTUM VP, and FA‑M3 PLC subsystems.

Q2: What communication protocols does it support?
A: Modbus and other subsystem protocols for versatile integration.

Q3: Can I adjust the communication speed?
A: Yes, baud rates are configurable from 300 to 19,200 bps.

Q4: What is the operating temperature range?
A: 0 °C to +55 °C, with storage range from –20 °C to +75 °C.

Q5: Is the module suitable for harsh environments?
A: Yes, it has industrial-grade construction for reliable operation.