Properties of the RS485 data line
Maximum length of the RS485 bus line
Max. 3940 ft
This length can be reached only under optimum conditions.
Cable lengths exceeding 1640 ft generally require a re-
peater or a hub
Maximum number of connected bus devices
99 d 1 data monitor device or max. 49 devices and
49 string com 1 data monitor device
Data cable
Twisted, shielded.
Recommendation
Black twisted pair for laying cable outside and in the
ground, (2x2) max. 20 AWG
Gray twisted pair for dry and damp indoor spaces, (2x2)
max. 20 AWG
↻
To prevent interference during data transmission:
- Observe the wire pairing when connecting DATA+ and DATA-.
- Do not lay the RS485 bus line in the vicinity of live DC/AC cables.
1. Loosen the cable fitting [ W_20]
2. Thread the connection cables through the cable fitting.
3. Connect the connection cable to the corresponding connection terminals.
4. The following must be connected to all inverters and to the data monitor unit in
the same way:
- Wire A (-) to wire A (-) and wire B (+) to wire B (+)
- GND to GND.
5. Tighten the cable fittings [ W_20 / 13,27 In-Ibs ]
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) .
↻
Check whether one of the devices represents the terminal unit.
F
Only activate the terminating resistor on the communication circuit board of the terminal unit using the DIP switch.
ð
RS485 connection made. Lay signal cable correctly.
7.9.5
Connecting external grid protection components
The contact is designed as an N/O contact and is labeled "ERR" or "Relay" on the circuit board.
Maximum contact load
DC
30 V/1A
↻
Connection area cover open.
1. Loosen the cable fitting to pass the signal cable through [ W_20]
2. Thread the connection cables through the cable fitting.
3. Attach the connection cables to the terminals. [See section 7.9.1
4. Tighten cable fitting [ W_20 / 13,27 In-Ibs ].
7 | Installation
Manual
KACO blueplanet 110 TL3 KACO blueplanet 125 TL3
Page 32
EN-US