ROTRONIC HF5 - Manual (Page 22)

E-M-HF5-V2_12
Rotronic AG
Bassersdorf, Switzerland
Document code Unit
HygroFlex HF5 Humidity Temperature
Transmitters: User Guide Instruction Manual
Document Type
Page 22 of 36
Document title
© 2009-2013; Rotronic AG E-M-HF5-V2_12
6.4.4 HF556: digital output
Connectors and terminal block diagram
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 (B18)
Terminal block K3 (RS-485): terminals K3-1 and K3-2 can be used to power the HF55 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 HF55).
WARNING: Connecting a device to an active Ethernet network can disrupt communications on the network.
Before connecting the HF5, make sure that it is properly configured for your network.
Terminals Description
K1-1: GND
Power supply (-) or neutral
(tied with other GND)
K1-2: V+
Power supply: 5…40 VDC (+)
or 12…28 VAC (Phase)
K1-3: - ► Protective ground (see note below)
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 (-)
(tied with other GND)
K3-1: PWR
DC (+) 15…24 VDC (+)
(optional, see note below)