E-m-hf5-v2_12 – ROTRONIC HF5 User 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

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)