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Haiwell PLC - Temperature & Humidity Module User Manual
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5. Main parameters for modules
5.1 Main parameters for digital temperature and humidity modules
Item
H04DT
H32DT
Input interface
DS18B20, RW1820, DS1990, SHT1x,
SHT7x sensor
DS18B20, RW1820, DS1990 sensor
Input Quantity
4 Channels 4 points
2 channels, each channel 16 points
Communication interface
None
RS485
Communication speed
None
2400~115200 Baud rate
Communication protocol
None
Standard Modbus
Power supply mode
PLC host internal power supply
PLC host internal power supply or independent external supply of 24VDC
Measured distance
≤200m(Wire resistance 50Ω)
≤200m(Wire resistance50Ω)
Measured range
DS18B20
：
-55~+125
℃
SHT11
：
-40~+123.8
℃
0~100%RH
DS18B20
：
-55~+125
℃
Isolation mode
No isolation between channels,analog & digital optical isolation
5.2 Main parameters for thermal resistance and thermocouple modules
Item
RTD input
Thermocouple input
Input range
Pt100, Pt1000, Cu50, Cu100
S, K, E, J, B, N, R, Wre3/25, Wre5/26, [0
，
20]mV, [0
，
50]mV, [0
，
100]mV
Resolution
0.1
℃
0.1
℃
Input impedance
6MΩ
6MΩ
Maximum input range
±13V
±30mA
Input indication
LED light ON means normal ,OFF means external disconnection
Response time
560ms/4 Channel, 880ms/8 Channel
Digital input range
16 bits, code range:0~32000
Precision
0.1% F.S
Power supply
MPU use internal power supply, expansion modules use external power supply 24VDC ±10% 5VA
Isolation mode
Optoelectronic isolation, no isolation between channels, analog & digital optical isolation
Power consumption
24VDC ±20%,50mA(maximum)
6. Wiring diagram
6.1 Digital temperature and humidity module: Single / multiple DS18B20, RW1820, DS1990 sensor input wiring diagram
SHT1X, SHT7X input wiring diagram
Note:
1
VDD (Vdd +) and (Vdd-) are the sensor power terminals that can be wired nearby;
2
Pin connection definition of DS18B20, RW1820, DS1990, SHT1X, SHT7X sensors can be seen in respective technical
information;
3
Cables between sensor DS18B20, RW1820, DS1990 and module are recommended to use shielded 4-core twisted pair;
one set of cable can be connected to ground (Vdd-) and signal lines (DT), the other set of cable can be connected to power
supply and ground (Vdd-), the shield is single-point grounded at the source.
