A4H124‑24FX P0973JN Foxboro A4‑Series 24×100Base‑FX Industrial Managed Fiber Switch for DCS Control Network
A4H124‑24FX P0973JN Foxboro A4‑Series 24×100Base‑FX Industrial Managed Fiber Switch for DCS Control Network - Image 2
A4H124‑24FX P0973JN Foxboro A4‑Series 24×100Base‑FX Industrial Managed Fiber Switch for DCS Control Network - Image 3
A4H124‑24FX P0973JN Foxboro A4‑Series 24×100Base‑FX Industrial Managed Fiber Switch for DCS Control Network - Image 4
A4H124‑24FX P0973JN Foxboro A4‑Series 24×100Base‑FX Industrial Managed Fiber Switch for DCS Control Network - Image 5

A4H124‑24FX P0973JN Foxboro A4‑Series 24×100Base‑FX Industrial Managed Fiber Switch for DCS Control Network

  1. A4H124‑24FX P0973JN – A4‑Series 24‑port full fiber managed switch (Target Model)
  2. P0973LN – A4‑Series 24‑port Gigabit copper managed switch
  3. P0973JQ – A4 modular hot‑swap mixed copper/fiber switch card
  4. P0973JP – A4 8 copper + 8 fiber standalone managed switch
  5. H92904CC0500 – I/A Series ACP controller CPU module
  6. H90QHQE013N0 – Foxboro H90 DCS operator workstation
Request Quote
Category: Brand:

Description

A4H124‑24FX P0973JN Foxboro A4‑Series 24×100Base‑FX Industrial Managed Fiber Switch for DCS Control Network

 

Product Application

A4H124‑24FX P0973JN belongs to Foxboro A4‑Series switch family, standalone full‑fiber managed switch, different from modular card type P0973JQ and copper model P0973LN. It is dedicated optical fiber network equipment for Foxboro I/A Series and Foxboro Evo DCS control LAN. It is widely used for long‑distance cabinet interconnection in petrochemical, refining, chemical and power plant control rooms. 24 MT‑RJ fiber ports realize electrical isolation and anti‑EMI interference between DCS nodes, connect ACP controllers, FBM communication modules and H90 workstations via optical fiber. Supports network redundancy, VLAN division, SNMP remote monitoring and port mirroring, guarantees low‑latency deterministic real‑time transmission of process control data in large‑scale DCS fiber network topology.

A4H124-24FX P0973JN

Product Specifications

  • Part Number: A4H124‑24FX / P0973JN
  • Manufacturer: Foxboro (Schneider Electric, formerly Invensys / Enterasys)
  • Product Type: 1U 19” Rackmount Layer‑2 Managed Industrial Fiber Switch
  • Port Configuration:
    • 24 × 100Base‑FX MT‑RJ fiber ports
    • 2 × 10/100/1000Base‑T RJ45 uplink / stacking ports
    • 2 × Gigabit SFP slots (mini‑GBIC) for fiber uplink expansion
  • Switching Capacity: 12.8 Gbps
  • Wire‑speed Forwarding Rate: 9.5 Mpps
  • MAC Address Table: 16K entries
  • Jumbo Frame: Up to 9216 bytes
  • Management: Local Console port, Web, Telnet, SSH, SNMP v2 / RMON
  • Supported Protocol: IEEE802.1Q VLAN (up to 4096 VLAN), QoS, LACP link aggregation, Rapid Spanning Tree, Port Mirroring
  • Power Supply: Dual hot‑swap redundant AC power supply 100‑240VAC, 50/60Hz
  • Max Power Consumption: 65.7 W
  • Operating Temperature: -40 ℃ ~ +70 ℃ industrial wide temperature
  • Humidity: 5% ~ 95% RH, non‑condensing
  • Vibration & Shock: IEC 68‑2‑6 / IEC 68‑2‑29 industrial standard
  • Certification: CE, UL, FCC, RoHS
  • Product Status: Spare replacement full‑fiber switch for legacy I/A DCS fiber network projects
  • Approx. Weight: 3.5 kg

 

Core Technical Parameters

  • All‑fiber front‑end ports: MT‑RJ fiber interface provides electrical isolation, avoids ground loop interference in DCS multi‑cabinet networking
  • Stackable architecture: Use 2×Gigabit RJ45 uplink ports to realize switch stacking, maximum stacking throughput up to 102.4 Gbps
  • Hot‑swap dual PSU, single power failure will not interrupt DCS fiber communication
  • Port mirroring function for network packet capture and DCS network fault diagnosis
  • Native compatibility with Foxboro DCS network management software; port / power fault alarm upload to DCS HMI
  • Flexible uplink selection: SFP slot supports multi‑mode / single‑mode gigabit fiber transceiver for long‑distance control room interconnection

 

Recommended Matching Spare Parts & Accessories (8 Items)

  1. Hot‑swap redundant AC power supply module for A4H124‑24FX
  2. Gigabit SFP fiber transceiver (Multi‑mode / Single‑mode)
  3. MT‑RJ fiber patch cord
  4. Console serial configuration cable
  5. Shielded CAT6 Ethernet cable for RJ45 uplink / stacking
  6. 19‑inch rack mounting bracket kit
  7. UPS uninterruptible power supply for switch cabinet
  8. Foxboro DCS network management configuration tool

 

Product Features

✅ 24‑Port All‑Fiber MT‑RJ Interface Pure fiber access ports, excellent anti‑electromagnetic interference capability, eliminate ground loop noise between different control cabinets, very suitable for long‑distance DCS cabinet interconnection.

✅ Dual Gigabit Uplink + SFP Expansion Dual RJ45 gigabit ports for stacking; 2 extra SFP slots support long‑haul fiber uplink, flexible network topology expansion.

✅ Full Layer‑2 Rich Network Management VLAN partition, QoS priority scheduling, rapid spanning‑tree anti‑loop, link aggregation, port mirroring, multi‑mode remote management for convenient DCS network O&M.

✅ Dual Hot‑Swap Redundant Power Supply Dual power slot design, single PSU failure will not interrupt DCS fiber network communication, high availability for safety‑critical process control.

✅ Industrial Wide Temperature Grade -40~+70℃ working range, strong EMC and anti‑vibration performance, adapts to harsh industrial control cabinet environment.

✅ Foxboro I/A DCS Official Validated Platform Passed Foxboro compatibility certification for I/A & Evo control network, stable real‑time transmission of DCS control messages.

✅ Network Fault Alarm Upload Port link failure, power module fault alarm signal can be uploaded to DCS operator HMI for real‑time network health monitoring.

A4H124-24FX P0973JN

Installation Guidelines

  1. Mount A4H124‑24FX P0973JN switch into standard 19‑inch control cabinet with rack bracket.
  2. Install dual hot‑swap power modules and connect them to two independent UPS power circuits for power redundancy.
  3. Connect FBM communication modules and remote cabinet network nodes to MT‑RJ fiber ports with MT‑RJ fiber jumpers.
  4. Insert SFP fiber transceiver module if long‑distance cross‑control‑room uplink is required, connect single‑mode / multi‑mode fiber cable.
  5. Connect console cable to notebook PC to finish initial IP, VLAN, spanning‑tree and stacking parameter configuration.
  6. Enable SNMP function to upload network status alarm to DCS HMI.
  7. Perform single power supply failure test and fiber port link redundancy test, confirm all DCS network communication keeps normal.
  8. Mark each fiber port wiring label for later maintenance.

 

Maintenance Instructions

Daily Maintenance Check switch power indicator and fiber port link LED on site. Monitor network fault alarm on DCS HMI. Inspect cabinet ventilation and temperature.

Periodic Maintenance (Every 6–12 months) Clean dust of switch air inlet. Inspect fiber jumper bending radius and connector cleanliness. Backup switch configuration file. Upgrade firmware version if Foxboro official recommendation released.

Fault Maintenance

  • Single power alarm: Replace defective hot‑swap power module without powering down switch.
  • Fiber port link down: Inspect MT‑RJ fiber connector dust, clean end face or swap to spare fiber port and modify network configuration.
  • Network communication delay / storm: Enable port mirroring to capture packets and locate abnormal DCS node.
  • Do not modify VLAN and spanning‑tree parameters arbitrarily without DCS network engineer authorization.

Long‑Term Operation Tips Keep cabinet temperature within operating range. Backup switch configuration file off‑site. Stock spare power module, SFP transceivers and MT‑RJ fiber jumpers for emergency replacement.

 

Brand Same‑Series Models (6 Models)

  1. A4H124‑24FX P0973JN – A4‑Series 24‑port full fiber managed switch (Target Model)
  2. P0973LN – A4‑Series 24‑port Gigabit copper managed switch
  3. P0973JQ – A4 modular hot‑swap mixed copper/fiber switch card
  4. P0973JP – A4 8 copper + 8 fiber standalone managed switch
  5. H92904CC0500 – I/A Series ACP controller CPU module
  6. H90QHQE013N0 – Foxboro H90 DCS operator workstation

Related products