ATOP SE5904D Series – 4-Port Industrial Secure Serial Device Server.
A 4-Port Industrial Secure Wide-Temperature Serial Device Server. Remotely monitor, manage, and control industrial field devices. Industrial EMC protection, wide temperature operation, -40°C~85°C. Fast-Ethernet ports or 2x 100/1000 SFP slots with RSTP Redundancy, 4 Software-selectable RS-232/RS-485/RS-422 serial ports, up to 921kbps TCP Server/Client, UDP, Virtual COM and Tunneling modes supported Embedded security with PPTP, IPsec