Integrated Multi-parameter Sensor Operation manual
19
3.3 Instrument connection
3.3.1 Real-time online connection
The specific steps of the instrument connection:
Remove the protective cap of the PH before powering the instrument, and then connect the core at the end
of the cable correctly according to the core definition table.
Important:
The power supply of this product is 9-36VDC. It is not allowed to connect directly to 220VAC
power supply. Otherwise, the sensor will be over-pressed. If there is no suitable power supply at the site,
you can use the 220VAC to 9-36VDC power
Core definition table
：
Wire Core No.
1
2
3
4
Sensor Wire
Red
Black
Blue
White
Signal
+12VDC
AGND
RS485 A
RS485 B
Connected with the host computer: multi-parameter sensor has standard MODBUS protocol, RS-485
interface, can be directly connected to the host computer (PC / data acquisition instrument, etc.), real-time
online monitoring and data transmission of the instrument. The connection can be achieved in the
following two ways:
(1)
RS485 to USB converter
(2)
RS485 to RS232 converter,
RS485 to RS232 can use any of the following:
Passive RS485 to RS232
Active RS485 to RS232.