Electrical connection
Operating Instructions KACO blueplanet 29.0TL3
Page 29
EN
Authorised electrician
Properties of the RS485 data line
Maximum length of the RS485
bus line
The maximum permitted length of the RS485 bus is 1200m.
This length can be reached only under optimum conditions.
Cable lengths exceeding 500m generally require a repeater or a hub.
Maximum number of
connected bus devices
31 inv 1 data monitoring unit
Data line
Twisted, shielded. Recommendations:
LI2YCYv (twisted pair) black for laying cable outside and in the ground, 2 x 2 x 0.5
LI2YCY (twisted pair) red for dry and damp indoor spaces, 2 x 2 x 0.5
Connecting the RS485 bus
"
To prevent interference during data transmission:
•
When connecting wire + and wire -, observe the wire pairing (Figure 38)
•
Do not lay RS485 bus lines in the vicinity of live DC/AC cables.
1.
Connect the connection cables to the corresponding connection terminals (see
Figure 34 on page 26).
2. 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 with GND (see Figure 37 on page 28)
W
ir
e
A (-)
W
ir
e
B (+)
W
ir
e
GND
W
ir
e
A (-)
W
ir
e
B (+)
W
ir
e
GND
3. Tighten the cable fitting.
4. Activate the terminating resistor on the terminal unit.
Figure 38: Assignment of
twisted-pair wires
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” menu) .
Activating the terminating resistor
ඣ
Check whether one of the inverters represents the terminal unit.
"
Only activate the terminating resistor on the communication circuit board of the terminal unit using the DIP
switch. (See Figure 34 on page 26)
»
Close the connection area or connect “inverter off”.
7.9.4
Connecting “Inverter Off”
NOTE
The Powador-protect digital output can only be used with suitable KACO inverters. When using
devices from other manufacturers or in combination with KACO inverters, external bus coupler
circuit-breakers as a minimum must be used for shutting down devices from other manufacturers.
