OPTOELECTRICAL TIME SYNCHRONIZATION CONVERTER FOR SIPROTEC RELAYS (SYNC.-TRANSCEIVER). TIME-TELEGRAM FOR SIPROTEC 4 DEVICES. SECOND PULSE OUTPUT FOR DIFFERENTIAL PROTECTION 7SD52. MINUTE-PULSE OUTPUT FOR SIPROTEC 3 DEVICES. OPTICAL CONNECTION TO GPS-RECEIVER UNIT 7XV5664-0AA00 WITH 62,5/125 UM MULTIMODE FIBER CABLE WITH ST-PLUGS. ELECTRICAL CONNECTION TO PORT A OR BINARY INPUT OF THE SIPROTEC DEVICES.