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RTCU LX4 pro Technical Manual V1.00
Advanced Industrial M2M/IoT Gateway
Wired M-Bus
The RTCU LX4 pro has an onboard wired M-Bus interface compliant with EN 13757-2/3 and offers a
comprehensive API for communicating with up to 20 slave devices on the bus.
The M-Bus interface is short-circuiting protected and supports full master-mode functionality. The
RTCU LX4 pro device needs to be supplied with an external supply for the M-Bus interface to be
operational.
M-Bus port pins
Pin
Name
18
M-BUS+
19
M-BUS-/SGND
Specification for the M-Bus:
Bus idle voltage
Slave devices
Speed
Wireless M-Bus (optional)
The RTCU LX4 pro supports an optional onboard wireless M-Bus interface compliant with EN 13757-
4/7 and offers a comprehensive API for collecting data from wireless M-Bus slaves.
The Wireless M-Bus interface is designed for OMS EU/CE applications, but other variants are also
available on request.
The module has support for modes S1, S2, T1, T2, and R2 as well as common reception of mode T
and mode C1 in the form of mode T1+C1 and T2+C1.
Specification for the Wireless M-Bus OMS EU/CE interface:
Frequency
Number of channels
Data Rate
Max output power
Indicative LOS
Logic IO ApS.
Holmboes Allé 14
8700 Horsens
Denmark
Description
M-Bus signal
M-bus ground / Signal ground
Min.
Typ.
Max.
-
-
36
-
-
20
300
-
9600
Min.
Typ.
Max.
-
868
-
12
4.8
-
100
-
-
10
-
500
Unit
VDC
Protected against short-
circuiting
bps
Unit
-
MHz
-
kchip/s
dBm
-
meter
Page 20 of 39
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Email: support@logicio.com
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