Toshiba GR200 Series Instruction Manual page 286

Top
Bottom
a. View from connector edge
C11
C12
Fiber optic module
5.
Fiber optic module is used for the serial communication in the IEC 60870-5-103 standard.
IRIG-B000 module
6.
IRIG-B000 module is used to receive the digital signal generated with an external clock; the
signal is in conformity to serial IRIG-B000 format. Note that the IRIG-B000 module is able to
receive digital signal (TTL) only (i.e., the reception of AM signal is not applicable). This module
is isolated using a photo coupler; the user should note A2 and B2 connectors are not used. The
peak value of IRIG-B000 signal should be greater than 3.5 volts; the IRIG-B000 module has
the 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 the
PCB connector
A1 B1
COM-A(+)
A2 B2
COM-B(−)
A3 B3
COMM(GND)
0V
b. Port circuit
Figure 4.3-9 RS485 connection and module
Figure 4.3-10 Fiber optic module
- 272 -
A1
B1
A2
B2
A3
B3
Frame ground (FG)
Centralized GRB200
(Soft: 030, 031, 032, 033, 034)
6F2S1931 (0.20)
Sheath
A cable for
an IED
Sheath
A cable for
another
IED