
www.fanox.com
SIA-D_
Rev. 07
52 / 117
ISO 9001:2008
stop bit). The protocol map and documentation that are used are attached in an appendix to this
manual.
The adapter (KITCOM) can be connected to this communications port to supply the equipment with
an external battery. It should be pointed out that this port can be used simultaneously for
communication, even when the equipment is being powered by an external battery.
The PC earth should be connected to the same earth as the relay to avoid communication problems.
5.11. Rear Communication. RS485
An option exists to fit the SIA-D with a rear communications port RS485, which must be specified
when the model is selected.
The RS485 port output has three terminals (+,- and GND), located on the rear of the equipment. The
protocol that is used is Modbus RTU (19200 -8bit – no parity – 1 stop bit).
The protocol map and documentation that are used are attached in an appendix to this manual.
This port can be used to continuously monitor the equipment from a remote PC or SCADA system.
Up to 32 pieces of equipment can be connected to one bus; each piece with a different modbus
address. The equipment modbus address can be configured using the SIcom program.
To minimise 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 strand cable is used for communication, the GND terminals must be connected to the earth
cable.
If a 2 strand cable is used for communication, the GND terminals must be connected to the shielding.
The shielding must be connected to the GND at only one point to avoid circular 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.
Fibre optics can be used in very aggressive environments, and they are connected by using the
corresponding converters.
Connection diagram for a RS485 bus:
SIA-E
+
-
gnd
SIA-E
+
-
gnd
SIA-E
+
-
gnd
C
R
C
R
+
-
gnd
RS485/RS232
RS232
Содержание SIA D
Страница 1: ...www fanox com SIA D_Rev 07 1 117 ISO 9001 2008 USER MANUAL SIA D Overcurrent relay...
Страница 36: ...www fanox com SIA D_Rev 07 36 117 ISO 9001 2008...
Страница 37: ...www fanox com SIA D_Rev 07 37 117 ISO 9001 2008...
Страница 38: ...www fanox com SIA D_Rev 07 38 117 ISO 9001 2008...
Страница 58: ...www fanox com SIA D_Rev 07 58 117 ISO 9001 2008...
Страница 60: ...www fanox com SIA D_Rev 07 60 117 ISO 9001 2008...
Страница 116: ...www fanox com SIA D_Rev 07 116 117 ISO 9001 2008 10 8 NOTES...