Description
Technical Specifications
| Parameter Name | Parameter Value |
|---|---|
| Product Model | Foxboro A2H124-24FX P0973BJ |
| Manufacturer | Foxboro / Enterasys (SecureStack A2 Series) |
| Product Type | Managed Fiber Ethernet Switch (Layer 2 + Lite Layer 3) |
| Fixed Fiber Ports | 24 × 100Base-FX multimode, MT-RJ connectors |
| SFP Uplink Slots | 2 × Gigabit SFP (Mini-GBIC compatible) |
| Copper/Stacking Ports | 2 × 10/100/1000Base-T RJ-45 (stacking or uplink) |
| Management Port | 1 × RJ-45 out-of-band management, 1 × RS-232 Console (DB9) |
| Switching Capacity | 12.8 Gbps (per unit) |
| Forwarding Rate | 35.7 Mpps wire-speed |
| MAC Address Table | 8,000 entries |
| Stack Capacity | Up to 8 switches (140.8 Gbps aggregate) |
| VLAN Support | IEEE 802.1Q |
| QoS | IEEE 802.1p, priority queuing for DCS traffic |
| Redundancy Protocols | STP/RSTP/MSTP, optional redundant power supply |
| Input Voltage | 100–240 V AC, 50/60 Hz; optional 24 V DC redundant feed |
| Power Consumption | Max 38 W (full load) |
| Operating Temperature | 0°C to +50°C continuous |
| Storage Temperature | -40°C to +70°C |
| Humidity | 5% to 95% non-condensing |
| Dimensions | 442 × 44 × 230 mm (1U rack mount) |
| Weight | Approximately 4.8 kg |
| Isolation Rating | 1500 V surge isolation (fiber transceiver bank to CPU PCB) |
Main Features and Advantages
The A2H124-24FX P0973BJ delivers purpose-built fiber networking for Foxboro DCS environments, eliminating the signal degradation and EMI vulnerabilities inherent in copper-based control networks. The 24 fixed MT-RJ multimode fiber ports provide direct optical connectivity to remote field controllers, I/O modules, and cabinet-mounted equipment without requiring external media converters. This integrated fiber architecture reduces hardware footprint, simplifies spare parts inventory, and removes a common failure point in industrial networks .
Purpose-Built for Foxboro I/A Series DCS: The A2H124-24FX P0973BJ arrives factory-preconfigured with DCS-specific QoS rules that tag Modbus TCP and proprietary control frames for highest-priority forwarding. This ensures that time-critical interlock and process control traffic traverses the network with minimal latency and jitter, even during periods of high background data load . The switch operates as a seamless extension of the Foxboro I/A Series network infrastructure, supporting the deterministic communication requirements of distributed control architectures.
Advanced Industrial Isolation: The A2H124-24FX P0973BJ employs a split PCB architecture that electrically isolates the fiber transceiver bank from the main switching ASIC. This design provides 1500 V surge isolation between field-side optical interfaces and core management circuitry, protecting sensitive DCS hardware from transient voltage spikes and ground potential differences common in industrial cabinet installations .
Flexible Uplink and Stacking Capabilities: Two SFP slots on the A2H124-24FX P0973BJ support hot-swappable Mini-GBIC transceivers, enabling flexible uplink configurations including 1000Base-SX/LX fiber for backbone connectivity or 1000Base-T copper for integration with existing gigabit Ethernet infrastructure. The switch also supports stacking up to eight A2-series switches into a single logical domain, providing scalable port density and unified management for growing network demands .
