ALF111-S00 Yokogawa Foundation Fieldbus FF-H1 Communication Module

Hardware Specifications

FOUNDATION Fieldbus Communication and DCS Interface Characteristics

The ALF111-S00 S1 manages FOUNDATION Fieldbus FF-H1 communication between field devices and Yokogawa control system networks. Moreover, the module provides four fieldbus ports to handle segment-level communication with connected instruments.

The module supports 31.25 kbps FOUNDATION Fieldbus transmission and manages communication timing through LAS and Clock Master functions. Therefore, the ALF111-S00 S1 maintains scheduled communication activities within FF-H1 segments according to network configuration requirements.

In addition, the module provides field-to-system isolation rated at 1500 V AC/minute, which separates field wiring circuits from system-side interfaces. The design supports FOUNDATION Fieldbus connectivity requirements, including segment capacity management with up to 48 points and 32 connected units per segment.

Frequently Asked Questions

Q: What communication protocol does the Yokogawa ALF111-S00 S1 support?
A: The ALF111-S00 S1 supports FOUNDATION Fieldbus FF-H1 communication with a transmission speed of 31.25 kbps.

Q: How many fieldbus interfaces are available on the ALF111-S00 S1 module?
A: The module provides four FOUNDATION Fieldbus FF-H1 communication ports for field network connections.

Q: What field segment capacity does the ALF111-S00 S1 support?
A: The module supports a maximum of 48 points per segment and up to 32 units per segment.

Field Installation Guidelines

Install the ALF111-S00 S1 module according to the Yokogawa system hardware configuration requirements. Verify module positioning, connector engagement, and fieldbus cable routing before applying system power.

Use appropriate shielded fieldbus wiring practices and connect cable shields according to the grounding requirements of the installed control system. Avoid routing FF-H1 communication cables near high-voltage power lines or sources of electromagnetic interference.

Confirm segment device allocation, termination arrangement, and communication settings before commissioning. Furthermore, check LAS and Clock Master configuration parameters to ensure correct FOUNDATION Fieldbus network operation.