Webdyn WebdynSunPM User Manual page 25

In order to suppress signal reflections as much as possible, a terminating resistor must be added to
the end of the transmitter lines. This end-of-line resistance must be of the same value as the line
impedance; i.e., 120 Ω.
If the WebdynSunPM concentrator is at the end of the line, activate the product's internal
termination resistance, represented by the
termination resistor as shown below.
The distances are in the range of one kilometer for flows of up to 230,400 bps, and 500 meters for a
flow rate of 460,800 bps.
On the same line, without the signal being regenerated, the EIA-485 standard imposes a maximum of
32 devices.
For more information regarding RS485/RS422 standards and equipment cabling, please
refer to EIA-485 and EIA RS-422-A.
WebdynSunPM – User guide — Version 1.0
symbol. To do this, connect the Rx+ terminal to the
USER GUIDE – WebdynSunPM
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