Kaco Powador 2002 Operating Instructions Manual page 27

Installing the inverter
Authorised electrician
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 manu-
facturers.
NOTE
Calculating effi ciency by measuring the current and voltage values can lead to misleading 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.
Connecting the RS485 bus
 To prevent interference during data transmission:
• Observe the wire pairing when connecting DATA+ and DATA- (see Figure
26)
• Do not install RS485 bus lines in the vicinity of live DC/AC cables.
1. Unscrew the cable fi tting.
2. Thread the connection cables through the cable fi tting.
3. Connect the connection cables to the corresponding connection termi-
nals (see Figure 24 on page 25).
4. The following must be connected to all inverters and to the data monitor
unit in the same way:
– Wire A (-) with wire A (-) and
– Wire B (+) with wire B (+) (see Figure 25 on page 26)
5. Tighten the cable fi tting.
6. Activate the terminating resistor on the terminal unit.
NOTE
When using the RS485 bus system, assign a unique address to every bus device (inverter, sensor) and
terminate the terminal units (see the "Settings" 8.3 on page 33 menu) .
7.5 Sealing the connection area
1. The requirements of protection rating IP54 are met by closing the unused cable fi ttings with blind caps.
2. Put on the lid for the connection area.
3. Close and lock the housing door.
» The inverter has been mounted and installed.
» Start up the inverter.
Operating Instructions for Powador 2002-6002_EN
Figure 26: RS485 bus: Assignment
of twisted-pair wires
EN
Page 27