完全符合USB v1.1和v2.0规范 支持RS-232端口 传输速度可达921.6 kbps 无需外接电源，USB端口电源驱动 即插即用装置 无需额外的IRQ或I/O端口 支持热交换功能

完全符合USB v1.1和v2.0规范 支持RS-232/422/485端口 传输速度可达921.6 kbps 自动RS-485数据流控制 无需外接电源，USB端口电源驱动 即插即用装置 无需额外的IRQ或I/O端口 支持热交换功能

16 x Gigabit Ethernet ports + 4 x SFP ports SFP socket for easy and flexible fiber expansion NEMA TS2 for traffic control EN50121-4 approval for railway trackside deployment Wide operating temperature range of -40 ~ 75°C (EKI-2720G-4FI) Dual 12 ~ 48 VDC power input and 1 x relay output

Dual 48 VDC power input and 1 x relay output -40 ~ 75°C wide-range operating temperature EN50121-4 approval for railway trackside deployment NEMA TS2 for traffic control SFP socket for easy and flexible fiber expansion 8 x IEEE 802.3 af/at PoE Gigabit ports + 4 x SFP ports

Provides flexible mounting: DIN-rail and Wall mount Provides redundant 12 ~ 48 VDC power input Provides broadcast storm protection Supports MDI/MDI-X auto crossover Supports full/half duplex flow control rovides 1 x 100 Mbps Multi-mode ST type fiber optic port Provides 4 x 10/100 Mbps Ethernet ports with RJ45 connector

Provides 8-port Fast Ethernet ports with Auto MDI/MDI-X Supports 10/100 Mbps Auto-Negotiation Provides broadcast storm protection Provides compact size with DIN-rail/Wall mount, and IP30 metal mechanism Supports redundant 12 ~ 48 VDC power input and P-Fail relay EKI-2528DI supports wide operating temperatures from -40 to 75°C DNV certificate

提供4个10/100Mbps以太网端口，带有RJ-45连接器 提供1个100Mbps多模SC型光纤端口 支持全双工/半双工流量控制 支持MDI/MDI-X自动跨接 提供广播风暴保护 提供冗余12~48VDC电源输入 提供灵活的安装方式：DIN导轨安装，面板式安装

提供5个自适应快速以太网口 支持10/100 Mbps 自适应 结构紧凑，支持 导轨安装/壁挂式安装, IP40等级金属外壳 支持12 ~ 48 VDC 冗余电源输入加一个直流电源插口和继电器报警 宽工作温度 -40 to 75 °C

Provides 4 x 10/100 Mbps Ethernet ports with RJ45 connector Provides 1 x 100 Mbps Multi-mode SC type fiber optic port (EKI-2525M) Provides 1 x 100 Mbps Single-mode SC type fiber optic port (EKI-2525S) Supports full/half duplex flow control Supports MDI/MDI-X auto crossove Provides broadcast storm protection Provides redundant 12 ~ 48 VDC power input Provides flexible mounting: DIN-rail and Wall mount

支持“自动化语言”Modbus/TCP协议，可用组态软件管理 支持“IT语言” SNMP协议，可方便采用网管NMS软件进行管理 基于QoS的VIP端口可保障关键数据的可靠传输 8.4 ~52.8 VDC 宽电压输入 EMS level 3 工业标准更适合苛刻环境应用 IEEE 802.3az 节能标准更加节能环保 支持9,216 Bytes巨帧传输，让数据传输更高效 支持12~48V冗余直流电源输入及P-Fail继电器 环路故障自动诊断