ROTRONIC HF3 - Manual (Page 16)

E-M-HF3-V1_22
Rotronic AG
Bassersdorf, Switzerland
Document code Unit
HygroFlex HF3 Transmitters and Thermo-
hygrostats: User Guide Instruction Manual
Document Type
Page 16 of 27
Document title
© 2009-2011; Rotronic AG E-M-HF3-V1_22
Terminal block diagram for type R and S
Measuring humidity or temperature only
Operation of the HF33 does not require both current loops to be closed. When using the HF33 to measure
either humidity only or temperature only, close only the loop that is being used.
If necessary, any unused output of the HF32 can be disabled with the ROTRONIC HW4 software.
6.3.3 HF34: thermo-hygrostat
Electrical diagram
NC: normally closed contact (relay not energized)
NO: normally open contact (relay not energized)
Terminals Description
1
Power supply: 15…40 VDC (+)
or 12…28 VAC (Phase)
2 Power supply (-) or neutral / ground
3
Relative humidity or dew point (+)
OUT-1
4
Temperature output (+)
OUT-2
5 Not used
6 Not used