REFU Elektronik GmbH
REFUsol 48K-UL
33
10.
To clamp and unclamp the terminal point, insert a screwdriver into the round opening on the orange
cover and lever downwards fully to complete the cable connection.
11.
Close the connection housing cover with four M5 screws with 3 Nm (2 ft lbs).
Pos : 44 /I nverter M anuals/ Ins tall ation/ Sc hni ttst ellenans chl uss R S485/ WR @ 1\ mod_1404806353765_641. doc x @ 6893 @ 2 @ 1
4.14
Interface Port RS485
The RS485 interface supports the USS (Universal Serial Interface Protocol) and Modbus/Sunspec protocols,
which can be used for transmission of data, for example, to a data logger of a remote monitoring system.
Fig. 14: Standard interface
When using this interface, please note that each device using the bus requires a unique address.
The bus termination is made by means of wire jumpers on RS485
To
make the termination take a short cable, remove the cable insulation, and connect the pin 1 to pin 2 as well
as pin 3 to pin 4.
Pin
Signal
Pin 1
(only used for termination)
Pin 2
RS485 +
Pin 3
RS485 -
Pin 4
Reference
