iSMA-B-MINI/MIX BACnet User Manual
www.ismacontrolli.com
DMP261en | 1st Issue rev. 8 | 05/2022
page 42 of 114
7.9 RS485_BIASING Property 3045
The property allows activating RS485 biasing resistors in order to pull up voltage on the
RS485 bus. The function is
only
available in
MINI IP modules
with a hardware version >=
2.0.
MIX IP modules
with hardware version 3.0 and up have a hardware switch for RS485
biasing under the bottom cover. For more information see installation instructions
available at
.
The biasing resistors are useful in case when iSMA modules are connected to third party
devices with the same RS485 bus and communication errors appear on the network.
WARNING!
Only one device in the network can have biasing resistors activated!