Connecting The Data Communication Signals; Terminating Resistors - Fronius Smart Meter 240V-3 UL Operating Instructions Manual

Connecting the -
Data Communica-
tion Signals
-
-
-
-
-
-
Terminating Re- The system might work without terminating resistors. Due to interferences, the use of ter-
sistors minating resistors according to the following schemes are recommended.
Connect the Data Communication Terminal from the Fronius Smart Meter to the Fro-
nius Inverter
- D+ to D+
- D- to D-
- - to -
The Fronius Solar Meter outputs are electrically isolated from dangerous voltages.
If the output wiring is near line voltage wiring, use wires or cables with a 300 V or 600
V rating (never less than the service voltage).
If the output wiring is near bare conductors, it should be double insulated or jacketed.
You may install two wires into each screw terminal by twisting the wires together, in-
serting them into the terminal and tightening them securely. Note: a loose wire can dis-
able an entire network section.
Use shielded twisted-pair cable to prevent interference. If there is no common conduc-
tor, connect the shield to the - (respectively C) terminal.
Shielded 24 AWG Cat5, Cat5e or 23-24 AWG Cat6 cable is acceptable.
I IO RS485
15