Yokogawa ALF111-S01 Module

Core Performance & Industrial Application

The Yokogawa ALF111-S01 (base ALF111) is a FOUNDATION Fieldbus H1 communication module for CENTUM VP / CS3000 DCS, acting as Link Active Scheduler (LAS) for H1 segments at 31.25 kbit/s.

Four H1 fieldbus ports, one per segment; deterministic cyclic data exchange with field transmitters; channel-to-channel isolated.

Powered 24 VDC ±10%; max 4.5 W; mounts in ESB/ER bus node unit slot; firmware revision matched to system revision.

It connects FOUNDATION fieldbus devices to the CENTUM control network as spare communication card.

Technical Specifications

▶ Product type: FOUNDATION Fieldbus H1 communication module

▶ Brand: Yokogawa

▶ Model: ALF111-S01; base ALF111

▶ Bus: FOUNDATION Fieldbus H1, 31.25 kbit/s; LAS function; 4 H1 ports

▶ Supply: 24 VDC ±10%; max 4.5 W

▶ Environment: 0~+50℃ operating; weight 340 g; 88×58×23 mm

▶ System: CENTUM VP / CENTUM CS3000 node unit

▶ Feature: Scheduled cyclic comms, segment isolation

▶ Note: Firmware revision, segment device count and cable length confirmed from engineering manual before ordering; power down node before insertion

▶ Country of origin: Japan

▶ Compliance: CE, FM certification

Industry Applications

Applied in FOUNDATION Fieldbus H1 segment integration to CENTUM DCS for field transmitter bus communication spare replacement.

Note: Confirm revision, redundancy mode and segment loading against system documentation before ordering