SCALANCE X204-2LD, MANAGED IE SWITCH, 4 X 10/100MBIT/S RJ45 PORTS, 2 X 100MBIT/S SINGLEMODE BFOC, ERROR SIGNAL CONTACT WITH SET BUTTON, REDUNDANT POWER SUPPLY,PROFINET-IO DEVICE, NETWORK MANAGEMENT, INTEGRATED REDUNDANCY MANAGER AND ELECTRONIC MANUAL ON CD, C-PLUG OPTIONAL