23
SUNSYS H30-H30i
- Ref.: IOMSUNHMXX04-GB 00
ENGLISH
4. WIRING
4.4.4. RS-485 serial port
The RS-485 serial port uses a cable with 3 wires: two for the differential communication signal (D+ and D-) and a third for the
voltage reference (GND) in line with the RS-485 standard.
If using RS-485 communication, activate the communication ports during the startup wizard.
However, the RS-485 communication parameters can always be set via the display menu
SETTINGS > CONNECTIVITY >
RS485 PORT.
The communication terminal block allows connection to one or more inverter units.
If multiple connection of several inverters is carried out, each unit must be assigned a different node number via the display menu
SETTINGS > CONNECTIVITY > RS485 PORT.
Moreover, only the last inverter in the chain must have line termination. To disable the termination resistors for the other inverters,
simply remove the jumper on the interface card.
The following diagram shows an example for connecting several inverters to a PC or data-logger.
4.4.4-2
RS-485/ RS 232
converter
Data-logger
(RS 485 port)
PC (RS 232 port)
XJ1
XJ1
XJ1
closed
open
open
Summary of Contents for SUNSYS H30
Page 4: ...4 SUNSYS H30 H30i Ref IOMSUNHMXX04 GB 00 4 ...
Page 37: ......
Page 38: ......
Page 39: ......