KACO blueplanet 5.0 - 9.0 TL3 - Manual (Page 26)

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Installation
Page 26 Operating Manual KACO blueplanet 5.0TL3 - 9.0TL3
Authorised electrician
NOTE
When routing the interface connection cable, note that too little clearance to the DC or AC cables can
cause interference during data transfer.
7.7.1 Connecting the RS485 bus
A B
GND
A B
GND
A B
GND
A B
GND
A B
GND
A B
GND
blueplanet
Inverter
Terminal unit
blueplanet
Inverter
blueplanet
Inverter
Data
logger
Communication
230 V AC
Figure 28: RS485 interface wiring diagram
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:
• When connecting wire A (-) and wire B (+), observe the wire pairing (see Figure
29)
• Do not lay 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 terminals (see
Figure 27 on page 25).
4. The following must be connected to all inverters and to the data monitor unit
in the same way:
–
Wire A (-) to wire A (-)
–
Wire B (+) to wire B (+) and
– GND to GND (Figure 28 on page 26)
5. Tighten the cable fi tting.
6. Activate the terminating resistor on the terminal unit. (Figure 27 on page 25)
W
ir
e
A (-)
W
ir
e
B (+)
W
ir
e
GND
W
ir
es A (-)
W
ir
e
B (+)
W
ir
e
GND
Figure 29: Assignment of
twisted-pair wires
7.7.2 Connecting the Ethernet interface
NOTE
The connection plug of an RJ45 cable is larger than the opening of an M25 cable fi tting when it is
installed. For this reason, remove the sealing insert before installation and thread the Ethernet cable
outside of the cable fi tting through the sealing insert.