ROTRONIC HF5 - Manual (Page 18)

E-M-HF5-V2_12
Rotronic AG
Bassersdorf, Switzerland
Document code Unit
HygroFlex HF5 Humidity Temperature
Transmitters: User Guide Instruction Manual
Document Type
Page 18 of 36
Document title
© 2009-2013; Rotronic AG E-M-HF5-V2_12
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): 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 or TCP/IP port: this port is optional
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)