Poseidon2
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RS-485 (RJ45) sensors
Industrial bus for connecting sensors over longer distances
Connect the sensors before powering up the unit.
Sensors can be daisy-chained, or connected to a virtual star using
the “
S-Hub
” unit.
Terminate the RS-485 line
with a 120 Ω to 470 Ω terminator. Some
sensors (e.g. Temp-485) contain a built-in terminator controlled with
a jumper or a DIP switch (TERM = ON). See the sensor manual.
Check or
set the sensor address. Each sensor on the RS-485 bus must have
an unique
address
. The address (ID) is expressed as a letter (A..Z / a..z) or a number (65..122). The
numbers correspond to the ASCII codes of the letters, A=65, Z=90, a=97, z=122.
More details on setting up the address in sensor manuals.
After any change in the connected sensors an autodetection has to be run again.
(WWW interface > Sensors >
Autodetect sensors
)
Sensors are shipped with non-conflicting addresses whenever possible. The preset address is written
on the label.
Note:
A particular sensor is identified by its RS-485 address. Sensors with the same
address can be swapped without the need for a new detection.
