Yokogawa ALF111‑50 | Fieldbus Communication Module Rave reviews Original

Brand：Yokogawa Electric

Item No.：Yokogawa ALF111-50

Product origin：Japan

Dimensions:130 × 127.5 × 32.8 mm

Weight:0.4 kg

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Product Introduction：

Overview
The Yokogawa ALF111‑50 is a communication module engineered for FOUNDATION Fieldbus H1 networks within Yokogawa control systems. It acts as a Link Active Scheduler (LAS) and clock master, enabling digital communication between field devices and the control system for efficient process automation.

General Information
Part Number: ALF111‑50
Manufacturer: Yokogawa Electric Corporation
Brand / Country of Origin: Yokogawa / Japan
Type: FOUNDATION Fieldbus Communication Module
Mounting: Installed in field control units or node units of the system
Technology: 4‑port Fieldbus H1 interface (31.25 kbps), supports up to 32 devices per segment, and dual‑redundant configuration

Power Specifications
Supply Voltage: 24 V DC (typical system backplane)
Current Consumption: ≤ 0.5 A
Protection: Withstanding voltage field‑to‑system 1,500 V AC for 1 minute
Indicators: Status LEDs for link active, segment fault, module health

Communication & Interface
Interface: FOUNDATION Fieldbus H1, low speed voltage mode
Number of Segments: Up to 4 ports (one segment per port)
Device Capacity: Up to 32 fieldbus devices per segment
Redundancy: Dual module pairing supported for reliability

Environmental
Operating Temperature: −20 °C to +70 °C
Humidity: Up to 95% RH, non‑condensing
Protection Rating: Designed for standard industrial cabinet environment

Dimensions & Weight
Dimensions (L × W × H): 130 × 127.5 × 32.8 mm
Weight: 0.4 kg

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