User's Manual

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-0F0002-1F0902-030B00 General Purpose USA Version 1 I Page 17 of 23 I November 13, 2014
7.4 Transceiver schematics
In Figure 10 an extract of the DSP board schematic of the UMRR is given. As can be seen in
this figure, the CAN A pins of the DSP TMS320F28335 are connected to a CAN transceiver
which is connected to the pins CAN_A_L and CAN_A_H. Similarly, the RS485 pins of the DSP
are connected to a RS485 transceiver, which is connected to the pins RS485_IN_P,
RS485_IN_N, RS485_OUT_P and RS485_OUT_N. It should be noted that the mentioned pins
CAN_A_L and CAN_A_H correspond to the pins 11 and 12 of the sensor connector described
in section 6.1 and that the RS485 pins correspond to pins 3, 4, 5 and 6.
The Pins CoPro_TX0_P, CoPro_TX0_N, CoPro_TXI_P and CoPro_TXI_N are connected to an
Ethernet magnetic module, which is connected to the pins CoPro_TX1_N, CoPro_TX1_P,
CoPro_TX2_N and CoPro_TX2_P. (please see Figure 11) These pins lead to the pins 1, 2, 9
and 10 of the connector, described in chapter 6.1.
Figure 10: UMRR-0F0002 DSP board schematics, CAN and RS485 transceivers