MM20-24E

Interface converter

Features

  • Transparent conversion of serial and Ethernet interfaces into M-Bus interface
  • Readout up to 20 M-Bus slave devices
  • RS-232, RS-485 and Ethernet interface
  • Ethernet parameters setup through web interface
  • Short circuit protection of M-Bus line
  • LED indications
  • Galvanic isolation of Ethernet line
  • Wide power supply range 10-28Vdc
  • 35mm DIN rail mounting

Description

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.

Application

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.

TECHNICAL SPECIFICATION

M-Bus interfaceM-Bus master, up to 20 M-Bus slave devices, transparent protocol, speed 300-9600Baud; 
Connection: Pluggable screw clamp, RM 5mm, 2.5mm2
Serial interfaceRS-232 DCE, RS-485; Connection: DB9 female
Ethernet interfaceIEEE 802.3, 10/100 Base-T, UDP and TCP/IP; Connection: RJ45
LED indicatorsON, Short, Slave, Ethernet
Overvoltage protectiontranzorb on RS-485 line and M-Bus line
M-Bus portquiescent current: 0-30mA, overcurrent: 50-70mA with restart, line voltage: 30.5V  5%, internal resistance <100Ohm
M-Bus line lengthmax 12km@300Baud, min 1km@9600Baud, cable JYSTYnx2x0.8
Power supply10 – 28VDC, 6Wmax
Power supply connectionPluggable screw clamp, RM 5mm, 2.5mm2
Working temperature0 do 55°C
Dimension95x35x87mm
Mounting35mm DIN rail

ORDERING INFORMATION

ModelSKUDescriptionPrice

MM20-24E10324Interface converter with RS-232, RS-485 and Ethernet interfaces€255
MM20-2410325Interface converter with RS-232 and RS-485 interfaces€179

*Minimum functionality kit needs to include the device and an appropriate power supply. Please note that all accessories are sold separately.

ACCESSORIES

ModelSKUDescriptionPrice 
UTP patch cord21749UTP patch cord 5E 2m crossover
€2
PS-1212-AD10261AC/DC adapter, DC12V 12W, AC100-240V 50/60Hz
€8
PS-2415-DIN23601Power supply, DIN rail mount, DC24V 15W, AC85-264V 50/60Hz
€11
CB-DB9MF-2M21745Serial Cable Assembly 1.8~2m, DB9 Male to DB9 Female
€4
ANT-GSM-M23266GSM antenna, Magnetic mount, cable 2.5m, 2.2 dBi, SMA, quad band
€7

Product Documents