Foxboro P0973JN A4H124‑24FX Managed Fiber Ethernet Switch

The Foxboro P0973JN (A4H124‑24FX) is a layer‑2 managed industrial fiber switch for Foxboro Evo DCS control networks. It features twenty‑four 100Base‑FX MT‑RJ fiber ports, together with gigabit copper and SFP uplink interfaces, delivering high‑speed reliable data exchange for distributed process‑control nodes.

This stackable unit supports VLAN, RSTP and SNMP remote management, and accepts redundant external power input to avoid network outages. It can be deployed as desktop, DIN‑rail or 19‑inch rack‑mount installation, built for continuous operation inside petrochemical and power‑plant DCS control cabinets.

Main Specifications

• Brand: Foxboro (Schneider Electric); Model: P0973JN / A4H124‑24FX; Type: Managed Industrial Fiber Ethernet Switch
• Applicable System: Foxboro Evo I‑Series DCS process‑control network
• Core Tasks: Industrial network switching, fiber‑based field‑node connection, network segmentation, stackable redundant networking, remote network monitoring
• Signal Interface: 24 × 100Base‑FX MT‑RJ fiber ports, 2 × 10/100/1000 RJ45, 2 × Gigabit SFP uplink ports, console management port
• Installation: Desktop default; optional DIN‑rail or 19‑inch rack‑mount via accessory kits
• Switching Capacity: 12.8 Gbps; Jumbo‑frame support up to 9216 bytes; stackable up to 8 units
• Power Supply: External DC power input, redundant power‑supply supported
• Operating Environment: 0℃ ~ +60℃, 5%‑95% RH non‑condensing, industrial EMC compliance
• Diagnostic: Front‑panel LED indicators for port link, activity, power and stack status; SNMP / web‑GUI management
• Certifications: CE, suitable for Class I Div 2 hazardous‑location industrial‑control networking

Core Functions

• Provide massive fiber ports to connect remote DCS controllers, I/O nodes and workstations over long‑distance optical links.
• Support VLAN segmentation, RSTP rapid spanning‑tree and QoS priority scheduling to guarantee real‑time control‑network traffic.
• Allow multi‑unit stacking to expand network scale, implement ring or daisy‑chain topology for network‑link redundancy.
• Support web‑GUI, console and SNMP for remote configuration, status reading and network‑fault diagnosis.
• Redundant power‑supply input prevents single power‑source failure from breaking DCS control‑network communication.
• Industrial‑hardened design adapts to long‑term continuous running in noisy process‑industry cabinet environments.

Application Scenarios

• Spare‑part replacement for Foxboro Evo DCS control‑network cabinets in petrochemical plants, refineries and power‑generation sites.
• Core network‑switch component for large‑scale distributed process‑control systems requiring multi‑fiber‑port connectivity.
• Maintenance backup inventory for renovation and after‑sales maintenance projects of legacy Foxboro DCS automation equipment.
• Matching network hardware cooperating with DCS controllers, operator workstations and field I/O modules.
• Retrofit replacement for old network switches with port failure and network‑instability faults.

• Global aftermarket spare supply for automation maintenance teams maintaining Foxboro DCS control‑system equipment worldwide.