Toshiba GR200 Series Instruction Manual

Also see for GRB200: Instruction manual

6F2S1931 (0.20)Centralized GRB200(Soft: 030, 031, 032, 033, 034)- 272 -C11C12Figure 4.3-9 RS485 connection and module5. Fiber optic moduleFiber optic module is used for the serial communication in the IEC 60870-5-103 standard.Figure 4.3-10 Fiber optic module6. IRIG-B000 moduleIRIG-B000 module is used to receive the digital signal generated with an external clock; thesignal is in conformity to serial IRIG-B000 format. Note that the IRIG-B000 module is able toreceive digital signal (TTL) only (i.e., the reception of AM signal is not applicable). This moduleis isolated using a photo coupler; the user should note A2 and B2 connectors are not used. Thepeak value of IRIG-B000 signal should be greater than 3.5 volts; the IRIG-B000 module hasthe input resistor (about 3k ohm). Thus, the terminal resistor can be required when the IRIG-B000 signal is delivered for several devices; the value of the terminal resistor depends on theBottomTopa. View from connector edge b. Port circuitA1A2A3B1B2B3A1A2A3B1B2B3PCB connectorSheathFrame ground (FG)COM-A(+)COM-B(−)COMM(GND)0VSheathA cable foran IEDA cable foranotherIED