ROTRONIC HF5 - Manual (Page 7)

E-M-HF5-V1_25
Rotronic AG
Bassersdorf, Switzerland
Document code Unit
HygroFlex HF5 Humidity Temperature
Transmitters: User Guide Instruction Manual
Document Type
Page 7 of 30
Document title
© 2009-2013; Rotronic AG E-M-HF5-V1_25
3.5 Digital interface (HF53 with digital option and HF55)
a) RS-485 serial interface
All HF5 models with a digital interface have a RS-485 serial port. When the number of available network ports
is limited, this port can be used to connect together up to 64 devices in a multi-dropped arrangement. In
principle, an unlimited number of such networks can be monitored with the HW4 software, but each RS-485
multi-drop network is limited to 64 devices. The HF5 can be used either as a slave or a master, without special
configuration. The master is automatically the device that is directly connected to a network (PC or LAN) by
means of a USB port or TCP/IP port.
RS-485 Compatibility: The communication protocol used by the HF5 and other AirChip 3000 products is not
compatible with the protocol used by the previous generation of ROTRONIC instruments. Do not connect
legacy products and AirChip 3000 products to the same RS-485 multi-drop network.
b) USB or Ethernet interface
The HF5 is also available with the following interface combinations: USB + RS-485 or Ethernet +RS-485. In
this case the protection grade of the HF5 enclosure is no longer IP65 / NEMA 4 rated.
3.6 Service connector
The service connector is a UART digital interface (Universal Asynchronous Receiver Transmitter) with a mini-
USB type connector. This allows connecting the HF5 with a service cable to a PC running the ROTRONIC
HW4 software.
See “Maintenance” for the location of the service connector and for the type of service cable to
be used. The service connector is used to configure the HF5 and to and update its firmware with the HW4
software.
Note: the digital interface (USB, Ethernet and RS-485) offers the same functionality as the service connector.
3.7 Probe
The HF5 is compatible with all available models of HygroClip 2 probes. For detailed information on the probes
see document E-M-HC2 Probes-V1.
4 User configurable settings and functions
The HF5 ships configured as specified on the customer order. Models with analog outputs can be installed
and used just as any conventional humidity and temperature transmitter and most users will never need to use
the HF5 configurable settings and functions. Models with a digital interface generally require some
configuration by the user.
Making use of the HF5 and probe configurable settings and functions is entirely up to the user and the
appropriate settings depend on the user application. We have provided below a short description of the HF5
and probe functions and also indicated the factory default settings.