CONFIDENTIAL AND PROPRIETARY
The Information contained in this document shall remain the sole exclusive property of s.m.s, smart microwave sensors GmbH and shall not
be disclosed by the recipient to third parties without prior consent of s.m.s, smart microwave sensors GmbH in writing.
UMRR-0C Type 42 User Manual USA-Canada_100MHz.docx Version 2
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November 22, 2017
Please note that in the standard configuration the sensor has no 120Ohms resistor on board
(CAN bus termination between CAN_Lo and CAN_Hi and RS485 IN / OUT). The resistors are
nevertheless required at either end of a CAN / RS485 bus and is in most cases integrated in
the cable delivered along with the sensor (if cable is manufactured by Smartmicro).
For the RS485 data interface there is a 120Ohms resistor on board of the sensor.
A number of cable sets for initial operation and test purposes are offered by Smartmicro, to
deliver a fast set-up of a sensor system. Among those preconfigured ready-to-run cables as
well as cable stumps (pig tail cables or various lengths) which carry the connector on one side
and open wires on the other.
