2
Inverter
5
Power supply
3
Data monitoring unit
Properties of the RS485 data line
Maximum length of the RS485 bus line
Max. 1200 m
This length can be reached only under optimum conditions.
Cable lengths exceeding 500 m generally require a repeater
or a hub.
Maximum number of connected bus devices
99 d 1 data monitoring unit
Data line
Twisted, shielded.
Recommendation
Li2YCYv (twisted pair) black for laying cable outside and in
the ground, 2 x 2 x 0.5 mm²
Li2YCY (twisted pair) grey for dry and damp indoor spaces, 2
x 2 x 0.5 mm²
↻
To prevent interference during data transmission:
- Observe the wire pairing when connecting DATA+ and DATA-.
Do not lay RS485 bus lines 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 Fit the ferrite clip on the door beam around the RS485 bus line using a cable tie.
4 Lay the connection cable correctly in the lower AC supply area and loosely
fasten it using the cable ties provided.
5 Open and close the door completely to check that the connection cable is not
subject to tensile or compressive forces.
6 Connect the connection cable to the corresponding connection terminals.
7 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
8 Secure cable ties.
9 Tighten the cable fittings [ W_20 / 1.5 Nm]
Fig. 36:
Assignment of twisted-pair
wires
NOTE
When using the RS485 bus system, assign a unique address to every bus device (inverter, sensor) and ter-
minate 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.
»
RS485 connection made. Lay signal cable correctly.
7.7.6
Connecting external grid protection components
The contact is designed as an N/O contact and is labelled "ERR" or "Relay" on the circuit board. []
Maximum contact load
DC
30 V / 1 A
AC
250 V / 1 A
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.
4 Tighten the cable fitting [ W_20 / 1.5 Nm]
Powador 30.0-72.0 TL3
Page 31
EN
