Twinno T4000 User Manual

Instrument connection
5
Tip: if the user needs to lengthen or shorten the cable, please
remove the black conductive skin outside the transparent wire
to prevent short circuit between the black conductive skin and
the reference end of the electrode.Multimeter can be used to
check, please use special cable for pH connection.
Electrical connection
Connection between instrument and pH or ORP sensors: Connection of power supply, output
signal, relay contacts and instrument baseplate. The cable length of sensors is usually 5-10
meters. There are labeled inserts at the end of the cable, which can be inserted into the terminal
with the same digital symbols on the instrument roof and tightened.
Terminal
N/C
N/C
Temp
Temp
Input
Ref
N/C
N/C
N/C
Cur 1+
Com -
Cur 2+
RS485 B
RS485 A
N/C
N/C
Temp
Temp
Input
Ref
N/C
N/C
N/C
Cur 1+
Com -
Cur 2+
RS485 B
RS485 A
NO 1
COM 1
NC 1
NO 2
COM 2
NC 2
Pow DC+
(9~36V)
Pow DC-
Pow PE
Function
No connection
Temperature sensor
Temperature sensor
Measurment
Reference
Current output 1+
Current output common terminal
Current output 2+
Communication
Communication
Function
High set relay working position
Alarm relay common
High set relay resting position
Low set relay working position
Alarm relay common
Low set relay resting position
DC power +（9-36V）
DC power -
Earth wire
Live wire
Neutral wire
Earth wire
Terminal
NO 1
COM 1
NC 1
NO 2
COM 2
NC 2
Pow DC+ (9~36V)
Pow DC-
Pow PE
Pow ACL (85~265V)
Pow AC N
Pow PE
Pow ACL
(85~265V)
Pow AC N
Pow PE
pH/ORP
18
Read instruction mode
The communication protocol adopts MODBUS (RTU) protocol. The content and address of the
communication can be changed according to the needs of customers.
The default configuration is network address 01, baud rate 9600, even check, one stop bit, users
can set their own changes;
Function code 0x04: This function enables the host to obtain real-time measurements from slaves,
which are specified as single-precision floating-point type (i.e. occupying two consecutive register
addresses), and to mark the corresponding parameters with different register addresses.
Communication address is as follows:
0000-0001: Temperature value
0002-0003: Main Measured Value
0004-0005: Temperature and Voltage Value
0006-0007: Main Voltage Value
Communication examples:
Examples of function code 04 instructions:
Communication address = 1, temperature = 20.0, ion value = 10.0, temperature voltage =
100.0, ion voltage = 200.0
Host Send: 01 04 00 00 08 F1 CC
Slave Response: 01 04 10 00 41 A0 00 41 20 00 42 C8 00 43 48 81 E8
Note:
[01] R
epresents the instrument communication address;
[04] R
epresents function code 04;
[10] represents 10H (16) byte data;
[00 00 00 41 A0] = 20.0; / temperature value
[00 00 4120]= 10.0; // Main Measured V
alue
[00 00 42 C8] = 100.0; / / Temperature and Voltage Value
[00 00 43 48] = 200.0; / / Main measured voltage value
[81 E8] represents CRC16 check code;

Twinno T4000 Specifications

General

Brand	Twinno
Model	T4000
Category	Measuring Instruments
Language	English