Rs485 Bus - MTX -3G-JAVA-IoT User Manual

4.5 RS485 bus

The STD models have a terminal block with a 5-way connector shared with the Power Supply section,
as shown and described below, used to implement the RS485 interface.
Port signals +RxA and –RxB are connected to an internal coprocessor through a transceiver. In the STD
model, which has two RS232 and a RS485 port, this coprocessor selects which of those ports are
connected to the Cinterion GSM engine's UARTs ASC0 and ASC1. Users can select the ports configuring
the decice's DIP switches. Please read
select the port of your choice.
It meets or exceeds the requirements of ANSI TIA/EIA-485-A.
Pin Signal
-RxB
1
+RxA
2
AUTO ON
3
4 VIN
5 GND
www.mtxm2m.com
section 4.7
Direction Limits
I/O
I/O
Input 0-VIN
Input 6.5-40VDC
Input
2017/07 v1.2
MTX M2M® by MATRIX ELECTRONICA S.L.U
MTX-xG-JAVA-IoT Family
to learn how to configure DIP switches in order to
Description
RS485 B signal (see section 4.6
RS485 A signal (see section 4.6
Automatic Restart after Shutdown Enable Signal (not available
in MTX-65i-RS485 FW2.00 (AUTO-ON) and MTX-65i-RS485-LC)
Positive power input
Negative power (ground)
for details)
for details)
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