Product Description

The A4H124-24Fx (P0973JN) is a carrier-grade industrial managed Ethernet switch designed for the backbone of Foxboro I/A Series and EcoStruxure Foxboro DCS networks. Featuring 24 fiber-optic ports, it delivers high-density, long-distance connectivity for geographically distributed control architectures.

Unlike commercial IT switches, the P0973JN is ruggedized for harsh industrial environments, offering high immunity to electromagnetic interference (EMI) and electrical surges commonly found in substations and plant floors. Fiber-based interfaces eliminate ground loop risks and support deterministic communication for time-critical control and safety traffic through advanced QoS prioritization.

Technical Specifications

Application

The A4H124-24Fx (P0973JN) is typically deployed as an aggregation or backbone switch in large-scale DCS installations, including:

• Interconnection of multiple FBM / FCM field cabinets

• High-bandwidth data transport for HMI, historian, and engineering workstations

• Deterministic separation of control, safety, and information traffic

Its fiber-based architecture ensures reliable long-distance communication without signal degradation, even in electrically noisy environments.

Frequently Asked Questions

Q: Does the A4H124-24Fx support SFP hot swapping?
A: Yes. SFP transceivers can be inserted or replaced without powering down the switch, minimizing network downtime.

Q: How is network redundancy achieved?
A: The switch supports Rapid Spanning Tree Protocol (RSTP), enabling millisecond-level recovery from fiber link failures by automatically rerouting traffic through redundant paths.