The TC3840DR - Rugged, Reliable, DIN Rail Hardened Managed Ethernet Fiber/Copper Switch Ideal for Harsh Environment Applications: SCADA, Utilities, Power Industry Traffic Control, Light Rail / Heavy Rail Systems Pipelines, Oil Refineries Industrial Automation, Manufacturing Military Features: 2-Port GigE SFP with 6-Port or 12-Port 10/100Base-T 2-Port GigE SFP with 6-Port 10/100Base-T & 4-Port serial (RS232 / RS422 / RS485) Optional 6-Port SFP 100FX or 4-Port Serial (RS232, RS422 or RS485) Ethernet Rate Limit, VLAN, RSTP/MSTP & QoS Built-In Power & Temperature Monitoring Hardened Temperature Options: Hi-Temp (-20ºC to 70ºC) & Extreme-Temp (-40ºC to 80ºC) click to enlarge Top