Kaco Powador 3200 Operating Instructions Manual page 28

I n sta l li ng the Inve rt e r
Authorised electrician
7.3.3 Connecting the RS485 bus
NOTE
Ensure that the A and B wires are properly connected. Communication is not possible if the wires are
reversed.
7.3.3.1 Wiring diagram
Powador
Term RS485 Term
RS485 RS485
A B
ON OFF
Figure 17: RS485 interface wiring diagram
Powador
RS485 Term SYM-Bus
RJ45
A B ON ON CAN CAN
Figure 18: RS485 interface wiring diagram with CAN (RJ45) connection
Properties of the RS485 data line
Maximum length of the RS485
bus line
Maximum number of
connected bus devices
Data line
NOTE
Diff erent manufacturers do not always interpret the standard on which the RS485 protocol is based
in the same way. Note that the wire designations (- and +) for wires A and B can vary between
manufacturers.
NOTE
Calculating effi ciency by measuring the current and voltage values leads to unusable results due to
the tolerances of the measurement devices. The sole purpose of these measured values is to monitor
the basic operation of the system.
Page 28
Powador
Powador
RS485 Term
RS485
A B
OFF
Powador
RS485 Term SYM-Bus
RJ45
A B OFF OFF CAN CAN
Patch-Cable
The maximum allowed length of the RS485 bus is 1200 m.
This length can be reached only under optimum conditions.
Lengths exceeding 500 m generally require a repeater of a hub.
31 inverters + 1 data monitoring unit
Twisted, shielded. Recommendations:
LI2YCYv (twisted pair) black for laying cable outside and in the ground 2 x 2 x 0.5
LI2YCY (twisted pair) grey for dry and moist indoor spaces 2 x 2 x 0.5
proLOG
RS485
A B
Powador
RS485 Term SYM-Bus
RJ45
A B OFF ON CAN
Operating Instructions Powador 3200-6600_EN
proLOG
CAN A B