YASKAWA Solectria PVI 25TL-480-R Installation And Operation Manual page 44

Installation and Operation Guide SOLECTRIA PVI 25TL-480-R
Shielded Cable: Solar PV inverters create an electrically noisy environment that can disrupt inverter communication. It is
important to use shielded cable to ensure communication is not interrupted.
Separate Communication Conductors from Power Conductors: Never run communication conductors in the same
conduit as power conductors. It is important to keep communication conductors away from power conductors to reduce
noise. If power conductors must intersect with communication conductors, it is preferable to have the intersection at a
90 degree angle.
3.6.5 Monitoring Compatibility
The SOLECTRIA PVI 25TL-480-R is compatible with SolrenView and third-party Data Acquisition Systems (DAS). When
using SolrenView monitoring the Ethernet Network Card is necessary. If connecting with third party monitoring
providers, RS-485 connections must be used.
3.6.6 Connecting Multiple Inverters
Multiple inverters shall be connected together in a serial (daisy-chain) fashion only. It is also suggested to follow the
below requirements:

The maximum number of inverters in any single daisy chain is 32 inverters.

Use shielded twisted pair as described in 3.6.4.

It is recommended to limit the maximum length of the RS-485 daisy chain to a maximum length of 3000 feet
(914 m).
When the inverters are monitored via the RS-485 communication, a unique RS-485 address for each inverter can be set
up through the APP interface. The daisy-chain topology is recommended for the RS-485 network connection to minimize
noise and bus reflections, as shown in Figure 3-29 RS-485 Network Connection. Other communication topologies, such
as the star networks, are not recommended.
DOCR-071030-A (11/17/2020)
485_A
485_B
485_GND
485_A
485_B
RS485-1
485_GND
1
Figure 3-28 Connection of Single (1) and Multiple Inverters (2)
INFO ✔
485_A
485_B
RS485-2
485_GND
485_A
485_B
RS485-1
485_GND
2
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