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10
COMMUNICATION AND HMI
The SIL-A relay is equipped with the following communications ports:
1
LOCAL (front)
Micro USB
Modbus RTU
2
REMOTE (rear)
RS485
Modbus RTU or IEC 60870-5-103 or
DNP3.0 Serial (by general settings)
3 (*)
REMOTE (rear)
RJ45
Modbus TCP/IP or DNP 3.0 TCP/IP
or IEC60870-5-104 (by general
settings)
4 (*)
REMOTE (rear)
RJ45
IEC 61850
(*) Port and Protocol available depending on model.
10.1 Local communication port. Micro USB
The USB communications port is installed on the front of the relay. The connector that is used is a micro
USB. The used protocol is Modbus RTU 115200-8bit
–
no parity
–
1 stop bit).
The PC earth should be connected to the same earth as the relay to avoid communication problems.
The USB communication is fitted with auxiliary voltage insulation, but no insulation with regards to the
relay processors. Therefore, the connection cable between the pc and relay must not be very long so
as to prevent possible electromagnetic interferences with the relay.
10.2 Remote communications port
SILA with one RS485 port for ModBus or for IEC60870-5-103 or DNP3.0 serial
There is one RS485 port, it is possible to select ModBus RTU protocol or IEC60870-5-103 or DNP3.0
serial protocol thanks to the general settings. The RS485 port output has two terminals (+,-), located on
the rear of the relay.
This port can be used to continuously monitor the relay from a remote PC or SCADA system. Up to 32
relays can be connected to one bus; each device with a different Modbus address. The relay Modbus
address can be configured using the SICom program.
To minimize communication errors as a result of noise, the use of a stranded and shielded cable is
recommended for the physical connection. All of the + terminals on one side, and all of the - terminals
on the other must be connected together in order to make the connection.
If a 3-wire cable is used, ground terminals (GND) should be connected to ground cable.
If a 2-wire cable is used, ground terminals (GND) should be connected to cable shielding. The shielding
should be connected in one just point to ground to avoid circulating currents.
Resistors should be used at each end if very long cables are used. The best solution for avoiding
reflection is to install resistors at both ends of the cable. The ohm value of these resistors must be equal
to the cable impedance value.
Summary of Contents for SIL-A A Series
Page 8: ...www fanox com Rev 04 8 112 2 1 2 Case dimensions The dimensions are in mm...
Page 9: ...www fanox com Rev 04 9 112 2 1 3 Connection diagrams 2 1 3 1 Analog connections...
Page 12: ...www fanox com Rev 04 12 112 2 2 SILA with short circuitable current terminals 2 2 1 Front view...
Page 13: ...www fanox com Rev 04 13 112 2 2 2 Case dimensions The dimensions are in mm...
Page 14: ...www fanox com Rev 04 14 112 2 2 3 Connection diagrams 2 2 3 1 Analogic connections...
Page 22: ...www fanox com Rev 04 22 112 3 3 Functional diagram...
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Page 111: ...www fanox com Rev 04 111 112 11 APPENDIX NOTES...
