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BA_REFUSOL 008K-023K_V11.3_EN
Minimum spacing
between single cores!
L3
L1

PE
L2
N
Single cores should not be laid along magnetic materials.
Note:
The sum total of the ohmic and inductive voltage drops on the power
supply line at nominal load should not exceed 1% of the line voltage. It
must be ensured that the line inductance remains < 30 µH.
4.14 Interface Port RS485
*
*
*
*
RS485 OUT
RS485 IN
Pin 1
Bus termination+
Pin 1
Reference +
Pin 2
RS485+ OUT
Pin 2
RS485+ IN
Pin 3
RS485- OUT
Pin 3
RS485- IN
Pin 4
Bus termination –
Pin 4
Reference –
Bus termination (wire jumper)
The RS485 interface supports the USS protocol (Universal Serial interface protocol) which can be
used for transmission of data, for example, to a data logger of a remote monitoring system.
Figure No. 19
Standard interface connection
When using this interface, please note that each device using the bus requires a unique address.
Bus termination is made by means of wire bridges on X14 to the last bus user (inverter “n“).
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