ENTERASYS A2H254-16 P0973BK是Foxboro定制OEM版本SecureStack A2二层网管交换机，电口+光纤混合端口设计，专门适配Foxboro I/A DCS系统控制柜组网。

ENTERASYS A2H254-16 P0973BK is Foxboro OEM SecureStack A2 managed switch with mixed copper and fiber ports, customized for Foxboro I/A DCS cabinet networking.

配置8个RJ45电口、8个MT-RJ多模光纤口，搭配千兆SFP上行与堆叠端口，支持VLAN、RSTP、端口安全与802.1X认证，抗干扰工业级设计，是化工、炼油存量Foxboro DCS稀缺停产备件。

It has 8 RJ45 ports, 8 MT-RJ fiber ports, gigabit SFP uplink and stack ports. Support VLAN, RSTP, port security and 802.1X, industrial EMC design, obsolete spare for legacy Foxboro DCS in chemical and refinery plant.

Main Specifications 技术参数

• 1. Product Series / 产品系列：Enterasys SecureStack A2 (Foxboro I/A OEM)

• 2. Part Numbers / 型号编码：A2H254-16，Foxboro P/N P0973BK

• 3. Function Type / 类型：Layer2 Managed Industrial Switch 二层网管工业交换机

• 4. Key Features / 特性：8×10/100TX,8×100BASE-FX MT-RJ, SFP uplink, VLAN, RSTP, 802.1X

• 5. Compatibility / 配套：Foxboro I/A Series DCS, FBM I/O模块, 工业控制机柜

Core Functions 核心功能

• 1. 光电混合接入，同时接入现场仪表双绞线和多模光纤长距离链路。
  Mixed media access for field instrument twisted pair and multi-mode fiber long-distance link.

• 2. 二层交换协议集，802.1Q VLAN、RSTP快速生成树、LACP链路聚合。
  Layer 2 protocols including 802.1Q VLAN, RSTP and LACP link aggregation.

• 3. 网络安全管控，802.1X端口认证、MAC绑定、L2~L4 ACL访问控制。
  Network security: 802.1X, MAC lock and L2-L4 ACL access control.

• 4. 多方式管理，支持CLI、Web、SNMP、SSH、Console本地调试。
  Multiple management: CLI, Web GUI, SNMP, SSH and RS232 console port.

• 5. 工业EMC加固，适应DCS柜内电磁环境，保障控制网传输稳定。
  Industrial EMC reinforcement for stable control network communication inside DCS cabinet.

Application Scenarios 应用场景

• 1. Foxboro I/A DCS系统控制柜，FBM现场I/O模块汇聚交换机。
  Aggregation switch for FBM I/O modules inside Foxboro I/A DCS control cabinet.

• 2. 石油炼化、天然气装置过程控制网，光纤远距离分支站点。
  Process control network and long-distance fiber branch in oil refinery and gas plant.

• 3. 化工、制药连续装置，现场仪表与控制器之间冗余网络链路。
  Redundant network link between field instruments and controllers in chemical and pharmaceutical plant.

• 4. 电厂、煤化工辅控系统，混合光电端口就地信号汇聚节点。
  Local signal aggregation node with mixed fiber and copper for power and coal chemical auxiliary control.

• 5. 存量Foxboro DCS系统维保，故障P0973BK交换机替换备件。
  Replacement spare for failed P0973BK during maintenance of legacy Foxboro I/A DCS.

FAQ 常见问答

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