FOSTCDRI-PH-MT The FOSTCDRI-PH-xx series are premium heavy industrial serial to fiber optic converters. Designed for rugged industrial environments, they have been put through most exacting compliance testing in the industry. Meeting IEC 61850-3 and IEEE 1613 requirements, they are suitable for installation in electrical substations. These specifications are more stringent than NEMA TS1/TS2 requirements for transportation applications. Powerful isolation protects equipment and data from damaging ground loops and surges. Additional isolation on the power supply circuits adds a third degree of protection. Packaged in a rugged IP30 metal case, these units convert serial signals to multi-mode or single-mode fiber optic. Bit-wise enabled circuitry automatically detects the data rate without setting a DIP switch. In addition to direct point-to-point connectivity, operation in multi-drop mode is possible enableing serial devices to communicate with up to 31 others in a fiber ring. Supporting mixed standards, you can replace other converters and add EMI/RFI protection inherent to fiber optic communications.