CEL-MAR ADA-1040PC3, User Manual

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3.5.2. CONNECTION OF INVERTER WITH SOLADIN INTERFACE TO RS485(2W) MODBUS-RTU
BUS
Fig. 8. Example connection of SOLADIN inverter by the use of ADA-1040PC3 to RS485(2W) 2-wire bus.
3.5.3. GND TERMINAL CONNECTION
Connection of GND terminals of RS485/422 interfaces, devices connected to RS485/422 bus, should be done in the case of a
potential difference of the signals grounds on interfaces RS485 / RS422, which prevents proper data transmission.
Cannot connect to the GND terminal - cables screens, PE circuit of electrical installation, signals grounds of other devices.
3.5.4. LINE TERMINATION Rt
The application of Line Termination (terminator) Rt = 120 ohms will reduce electrical reflection in data line at high baud rate. It is not
needed below 9600Bd. Should be used the Line Termination resistor if the distance is over 1000m @ 9600Bd or 700m @ 19200Bd,
and if the disturbance in transmission will appear.
Example connection of Rt are shown on Fig. 7 & 8. Two Rt=120
W
, 5%, 0,25W are delivered with the converters.
3.6. POWER SUPPLY CONNECTION
To connect power supply to the converter, should have DC power supplies (regulated) output voltage from 10 V= to 30V=, min.
nominal power 2W, e.g. ZS-12/250. Power cable from DC power supplies to device can not be longer than 3m.
Should connect positive (+) end of DC power supplies to V+ device terminal and negative (-) end to V- on terminal block. ADA-
1040PC3 has protection against power supply reverse connection.
4. ACTIVATION
The converter can be power on after properly connection according to section above.
If after connection power supply on front panel will not light green led PWR, check correctness of power supply connecting
(polarization). When data is present the LEDs Tx and Rx should blink.
ATTENTION!
AT BAUD RATE ABOVE 38.4 KBPS THE LED'S TX, RX WILL LIGHT WEAKLY DURING DATA TRANSMISSION
8
ADA-1040PC3
GND
Rt
Rx+
Rx-
Tx+/ A
Tx-/ B
SLAVE-2
MODBUS-RTU SLAVE-1
MODBUS-RTU
MASTER MODBUS-RTU
device
Computer or
MASTER
MODBUS-RTU
device
RS485(2W) bus
19200Bd/8/N/1
MODBUS-RTU
MASTERVOLT inverter
with Soladin interface
SOLADIN 600
WINDMASTER 500
RS232
9600Bd/8/N/1
RS485 / RS422
connector