Based on RS485 Interface ,Modbus Temperature acquisition module agreement .
IsolationRS485Interface, support Modbus-RTU Agreement.
Stand byPT100Two-wire temperature sensors , three -wire connection .
Completion of the internal module temperature calculation can be read directly temperature value in degrees Celsius .
Measuring range:PT100Sensors : Temperature-99.9 ~+650, resolution0.1; Accuracy0.5.
Power supply: DC8-30V Static power consumption is less than0.05W.
Using standard35mmRail mounting .
Dimensions:88 * 72* 59
Working temperature:-35 ~+50.
Applications: liquids, gases, temperature measurement fields.
2 Common product pictures and interface
Photos and interface are as follows:
A:RS485 Serial communication A
B:RS485 Serial communication B
Power supplyV +: DC power positive
Power supplyGND: DC power supply negative , the common terminal
Three-wire connection:
RTD (n) +: Sensor supply side, about0.5mAOutput.
RTD (n) -: Sensor inputs.
GND: Sensor common.
Two-wire connection:
RTD (n) +: Sensor supply terminal+Measurement inputs about0.5mAOutput.
RTD (n) -: NeedGNDShorted.
GND: The other end of the sensor .
3 RegisterInformation tables and function code
3.1Function Code03H( Read)06H( Write)
ParametersSetting registerInformation Sheet
Word Address | Byte Location | Description | Parameter Description | Property |
10 | Low8Position | Communication Configuration Default:00 | BIT<7:5> Reservation BIT<4:3>00 =No parity 01 =Even parity10 =Odd parity (11 =Odd parity ) BIT<2:0>000 = 9600 001 = 1200 010 = 2400 011 = 4800 100 = 9600 101 = 14400110 = 19200Other combinations are not defined according to9600Deal with | RW |
High8Position | Mailing Address Default:01 | Setpoint range= 1To250 Address0Broadcast address(If the value set for the communication program0Equivalent to1) | RW |
11H | Low8Position | Reservation | | RW |
High8Position | Round display switching interval Default:05 | Setpoint range3To 9( Sec )If set to00H,01H,02H, Then with03HEquivalent . If the value exceeds09H, Then with09HEquivalent . | RW |