INSTALLATION
SINUS K
INSTRUCTIONS
100/
191
12.1.1.
D
IRECT
C
ONNECTION
Electrical standard RS485 may be connected directly to the computer if this is provided with a special port of this
type. In case your computer is provided with a serial port RS232-C or a USB port, an RS232-C/ RS485 converter
or a USB/RS485 converter is required.
Elettronica Santerno may supply both converters as optional components.
Logic “1” (normally called a MARK) means that terminal TX/RX A is positive with respect to terminal TX/RX B
(vice versa for logic “0” , normally called a SPACE).
12.1.2.
M
ULTIDROP
N
ETWORK
C
ONNECTION
SINUS K inverters may be connected to a network through electrical standard RS485, allowing a bus-type
control of each device; up to 247 inverters may be interconnected depending on the link length and baud rate.
Each inverter has its own identification number, which can be set in the “Serial network” submenu as a unique
code in the network connected to the PC.
12.1.2.1.
C
ONNECTION
For the connection to the serial link use the 9-pole, male D connector located on the control board (sizes
S05..S15) or on the inverter bottom besides the terminal board (sizes
≥
S20).
The D connector pins are the following.
PIN FUNCTION
1 – 3
(TX/RX A) Differential input/output A (bidirectional) according to standard RS485. Positive polarity
with respect to pins 2 – 4 for one MARK. Signal D1 according to MODBUS-IDA association.
2 – 4
(TX/RX B) Differential input/output B (bidirectional) according to standard RS485. Negative
polarity with respect to pins 1 – 3 for one MARK. Signal D1 according to MODBUS-IDA
association.
5
(GND) control board zero volt. Common according to MODBUS-IDA association.
6
(VTEST) Test supply input – (see section below)
7 – 8
not connected
9
+ 5 V, max 100 mA for power supply of optional converter RS485/RS232
The D-connector metal frame is connected to the grounding. Wire duplex cable braiding to the metal frame of
the female connector to be connected to the inverter. To avoid obtaining a too high common voltage for driver
RS485 of the master or the multidrop-connected devices, connect together terminals GND (if any) for all
devices. This ensures equipotentiality for all signal circuits, thus providing the best operating conditions for
drivers RS485; however, if devices are connected to each others with analog interfaces, this can create ground
loops. If disturbance occurs when communication interfaces and analog interface operate at a time, use
optional, galvanically isolated RS485 communications interface.
Содержание SINUS K
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