Manual

E-M-HF5-V1_25
Rotronic AG
Bassersdorf, Switzerland
Document code
Unit
HygroFlex HF5 Humidity Temperature
Transmitters: User Guide
Instruction Manual
Document Type
Page
19 of 30
Document title
© 2009-2013; Rotronic AG E-M-HF5-V1_25
Terminal block diagram (analog outputs and digital option)
Type D and W (horizontal mount)
Notes:
Terminal K1-3: this terminal (protective or earth ground) is not tied with GND. If so desired, K1-3 can be tied
with GND by closing a solder pad on the PCB
Terminal block K3 (RS-485): with the exception of models with the galvanically isolated power supply option,
terminals K3-1 and K3-2 can be used to power the HF53 from a 15 to 24 VDC power supply connected to the
RS-485 main data line. In this case, do not use terminals K1-1 and pin K1-2 (normally used to power the
HF53).
USB port: depending on the ordering code the HF53 may or may not be equipped with this port
Measuring humidity or temperature only
Operation of the HF53 does not require both current loops to be closed. When using the HF53 to measure
either humidity only or temperature only, close only the loop that is being used.
Using the ROTRONIC HW4 software, any unused output of the HF53 can be disabled.
Terminals
Description
K1-1: GND
Power supply (-) or neutral
(tied with other GND)
K1-2: V+
Power supply: 15…40 VDC (+)
or 12…28 VAC (Phase)
K1-3: -►
Protective ground (see note below)
Terminals
Description
K2-4: GND
Ground (tied with other GND)
K2-3: GND
Ground (tied with other GND)
K2-2: OUT2
Temperature output (+)
K2-1: OUT1
Relative humidity or dew point (+)
Terminals
Description
K3-4: D-
RS-485 Bi-directional
TX- / RX -
K3-3: D+
RS-485 Bi-directional
TX+ / RX +
K3-2: GND
Ground / Power supply (-)
K3-1: PWR
DC (+) 15…24 VDC (+)
(optional, see note below)