No. Function
Modbus RTU 2-wire (RS485):
D- Modbus data -
D+ Modbus data +
Int./ext. Power supply
- GND
+ U
int
/ U
ext
Internal voltage output 12.8 V
or
input for an external supply voltage
>12.8 - 24 V DC (+ 20%)
Digital inputs: 0 - 3, 4 - 9
Voltage level: low = min. 0 V - max. 1.8 V; high = min. 3 V - max. 24 V DC
(+ 20%)
Input currents: dependent on input voltage; input resistance = 46 kOhm
Digital outputs: 0 - 3
Switching capacity when power is supplied by the Fronius Datamanager
2.0 plug-in card: 3.2 W in total for all 4 digital outputs
Switching capacity when power is supplied by an external power supply
delivering min. 12.8 - max. 24 V DC (+ 20%), connected to Uint / Uext
and GND: 1 A, 12.8 - 24 V DC (depending on external power supply) for
each digital output
The connection to the I/Os is established via the mating connector sup-
plied.
(8) Antenna socket
This is where the WLAN antenna is connected
(9) Modbus termination switch (for Modbus RTU)
Internal bus terminator with 120 ohm resistor (yes/no)
Switch in "ON" position: 120 ohm terminating resistor active
Switch in "off" position: no terminating resistor active
IMPORTANT! On an RS485 bus, the terminating resistor on the first
and last device must be active.
(10) Fronius Solar Net Master / Slave switch
To switch from master to slave mode within a Fronius Solar Net ring
IMPORTANT! In slave mode, all the LEDs on the Fronius Datamanager
2.0 plug-in card are off.
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