MM20 is interface converter intended for feeding and transparent reading of M-Bus slave devices. Converter has RS-232, RS-485 and Ethernet interfaces, where the lowest priority is dedicated to RS-232 and the highest to Ethernet interface. It is designed to withstand short circuit on M-Bus line. LED indicators show status and activity of M-Bus line, slave devices and Ethernet port. Power supply has wide range, from 10 up to 28Vdc. Device is suitable for 35mm DIN rail mounting.
DECODE MM20 acts on M-Bus line as standard M-bus master device which can sustain up to 20 M-Bus slave devices. It can be used for local or remote reading of calorimeters, water meters, electricity meters and other devices which fulfill M-Bus protocol. Converter is fully adjusted for industrial communications, automation processes and telemetry. For increasing system capacity, it is possible to connect more than one MM20 converter in parallel.
M-Bus master, up to 20 M-Bus slave devices, transparent protocol, speed 300-9600Baud;
Connection: Pluggable screw clamp, RM 5mm, 2.5mm2
RS-232 DCE, RS-485; Connection: DB9 female
IEEE 802.3, 10/100 Base-T, UDP and TCP/IP; Connection: RJ45
ON, Short, Slave, Ethernet
tranzorb on RS-485 line and M-Bus line
quiescent current: 0-30mA, overcurrent: 50-70mA with restart, line voltage: 30.5V 5%, internal resistance <100Ohm
M-Bus line length
max 12km@300Baud, min 1km@9600Baud, cable JYSTYnx2x0.8
10 – 28VDC, 6Wmax
Power supply connection
Pluggable screw clamp, RM 5mm, 2.5mm2
0 do 55°C
35mm DIN rail
Interface converter with RS-232, RS-485 and Ethernet interfaces
Interface converter with RS-232 and RS-485 interfaces
*Minimum functionality kit needs to include the device and an appropriate power supply. Please note that all accessories are sold separately.