ROTRONIC HF65 - Manual (Page 9)

E-M-HF63_65-V1_11
Rotronic AG
Bassersdorf, Switzerland
Document code Unit
Instruction Manual
Document Type
HygroFlex HF63/HF65 Humidity Temperature
Transmitters: User Guide
Document title
Page 9 of 34
© 2008; Rotronic AG E-M-HF63_65-V1_11
3 General description
3.1 Power supply
Depending on the circuit type, the HF6 requires the following power supply:
a) HF631 to HF635 (3-wire with analog outputs): 15 to 40 VDC (see note below) or 12 to 28 VAC. With both
output circuits closed, the maximum current consumption is 50 mA.
Note: depending on the type of output signal, the HF63 will operate with the following minimum voltage
0…1 V outputs:
5 VDC or 5 VAC
0…5 V outputs: 10 VDC or 8 VAC
0…10 V outputs: 15 VDC or 12 VAC
0…20 mA or 4 …20 mA outputs: 6 VDC or 5 VAC with 0 Ω load
15 VDC or 12 VAC with 500 Ω load
b) HF636 to HF63A (3-wire with analog outputs): 85 to 265 VAC
c) HF656 (3-wire) with digital outputs: 5 to 40 VDC or 12 to 28 VAC. Maximum current consumption:
Model with USB interface:
50 mA
Model with Ethernet (TCP/IP) interface: 300 mA
d) HF658 (3-wire with digital outputs): 85 to 265 VAC
3.2 Measured parameters
The HF63 and HF65 measure relative humidity with a ROTRONIC Hygromer ® IN1 capacitive sensor and
temperature with a Pt100 RTD.
3.3 Calculated parameters
Using the ROTRONIC HW4 software, the HF63 or HF65 can be configured by the user to calculate either the
dew point or the frost point.
3.4 Analog output signals (HF63)
With the ROTRONIC HW4 software any analog output signal can be made to correspond to one of the
following:
• Relative humidity
• Temperature
• Calculated parameter
Any output can also be disabled.
The scale of each analog output can be set within the numerical limits of -999.99 and 9999.99.