Advertisement
4.1.2
Communication Ports
The following interfaces can be mounted as communication ports:
•
RS232C port
•
RS485 port
•
IRIG-B port
RS232C port
This connector is a standard 9-way D-type connector for serial port RS232C transmission and is
mounted on the front panel. By connecting a personal computer to this connector, setting
operation and display functions can be performed from the personal computer. This port is
provided on the front of the relay.
RS485, Fibre optic port
The RS485 port is used for communication interface such as IEC60870-5-103, DNP 3.0 or
Modbus RTU etc., to connect a PC or a substation control system and to construct a network
communication system. (See Figure 4.4.1 in Section 4.4.) The GRD150 can provide two RS485
serial ports (RS485-1 and RS485-2). RS485-1 (CH1) is available for RSM100 or Modbus, and
RS485-2 (CH2: option) for IEC60850-5-103 or DNP3.0. These ports are provided on the back of
the relay, as shown in Figure 4.1.3 and Appendix G. Screw terminal for RS485 and/or ST
connector for fibre optic are provided on the back of the relay.
IRIG-B port
The IRIG-B port collects serial IRIG-B format data from the external clock to synchronize the
relay calendar clock. This port is provided on the back of the relay, as shown in Figure 4.1.3.
TB 9
TB 10
IO4
Model ∗∗1: IO1 only
Model ∗∗3:IO1, IO2, IO3
TB 7
TB5
TB3
1
1
1
2
2
2
1 9
19
19
20
20
20
TB 8
TB6
TB4
1
1
1
2
2
2
19
19
19
20
20
20
IO3
IO2
IO1
Model ∗∗2: IO1, IO2
Model ∗∗4: IO1, IO2, IO3, IO4
Rear view
Figure 4.1.3 Location of Communication Port
⎯
147
1
2
E
19
20
RX
1
TX
2
TB1
1
2
TB2
1
2
7
8
19
17
18
20
SPMM
VCT
⎯
6 F 2 S 0 8 4 2
Fibre optic
portl
RS485
connection
terminal
IRIG-B
Advertisement
