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Set the bus address on the sensor (see sensor documentation).
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If the device is the last one on the RS485 bus, terminate the bus with a 120 Ω terminating resistor.
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Various Modbus devices can only be queried together if the serial communication parameters are identical (baud rate, number of data bits, parity, stop bits).
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Pyranometers can be used to measure irradiance either in horizontal or module plane.
|
Description |
|
|---|---|
|
1 |
Data logger terminal, RS485 |
|
2 |
Data logger terminal, Power Out |
|
3 |
Pyranometer |
|
4 |
Terminating resistor |
Connection
|
Wire color |
Use |
|---|---|
|
Blue |
GND / RS485 Modbus interface GND |
|
Red |
Power supply (5.5 … 30 V DC) |
|
Pink |
Irradiance signal power supply (5.5 … 30 V DC) |
|
Grey |
Irradiance signal (4 … 20 mA) |
|
Brown |
Not used |
|
Yellow |
Not used |
|
Green |
RS485 Modbus interface B (-) |
|
White |
RS485 Modbus interface A (+) |
|
Black |
Shield |