Endurance® Series
Users Manual
24
Just the 2-wire (half duplex) communication is supported on the Endurance sensor side. The
disadvantage is that the data transfer is just alternating possible in one direction at a time. The
maximum communication baud rate between the Endurance device and the USB/RS485
converter is 115.200 kBaud. A Baud rate of 38.4 kBaud is the default (preset) value in the
Endurance series device during factory setup.
Just the 2-wire (half duplex) mode is supported by the Endurance devices
in serial RS485 communication!
Figure 14: USB/RS485 Converter
Multiple Endurance sensors in a RS485 Multidrop Network Wiring
For an installation of two or more Endurance sensors in a RS485 network (2-wire, half duplex),
each Endurance sensor needs it’s specific RS485 network address (1 - 32), preset via the
Endurance control panel (user interface) or alternatively via a standard terminal program
(operating system dependent). Once all the units are addressed, wire up the units in the 2-wire
multidrop manner, whereas all A-signals, as well all B-signals have to be connected to common
lines. The common A-signals have to be routed to the TX+ and the common B-signals to TX-
terminal at the selected USB/RS485 converter.
5.3.6. Addressing the Endurance sensor in a RS485 Multidrop Network
If you are installing two or more sensors in a multi-drop configuration, please be aware of the
following:
•
Each sensor must have a unique address greater zero (1 - 32).
•
Each sensor must be set to the same baud rate (default is 38.4 kBaud).
•
Once all the units are addressed, wire up the units in the 2-wire multidrop manner,
keeping all A & B to be common.
•
Now you can run the supplied Multidrop Software, an own written communication
software or an individual terminal program to access the Endurance sensor for issuing
commands and receive the responses.
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