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 interface | M-Bus master, up to 20 M-Bus slave devices, transparent protocol, speed 300-9600Baud; Connection: Pluggable screw clamp, RM 5mm, 2.5mm2 |
| Serial interface | RS-232 DCE, RS-485; Connection: DB9 female |
| Ethernet interface | IEEE 802.3, 10/100 Base-T, UDP and TCP/IP; Connection: RJ45 |
| LED indicators | ON, Short, Slave, Ethernet |
| Overvoltage protection | tranzorb on RS-485 line and M-Bus line |
| M-Bus port | 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 |
| Power supply | 10 – 28VDC, 6Wmax |
| Power supply connection | Pluggable screw clamp, RM 5mm, 2.5mm2 |
| Working temperature | 0 do 55°C |
| Dimension | 95x35x87mm |
| Mounting | 35mm DIN rail |
| Model | SKU | Description | Price | ||
| MM20-24E | 10324 | Interface converter with RS-232, RS-485 and Ethernet interfaces | €255 | ||
| MM20-24 | 10325 | Interface 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.
| Model | SKU | Description | Price | ||
| UTP patch cord | 21749 | UTP patch cord 5E 2m crossover | €2 | ||
| PS-1212-AD | 10261 | AC/DC adapter, DC12V 12W, AC100-240V 50/60Hz | €8 | ||
| PS-2415-DIN | 23601 | Power supply, DIN rail mount, DC24V 15W, AC85-264V 50/60Hz | €11 | ||
| CB-DB9MF-2M | 21745 | Serial Cable Assembly 1.8~2m, DB9 Male to DB9 Female | €4 | ||
| ANT-GSM-M | 23266 | GSM antenna, Magnetic mount, cable 2.5m, 2.2 dBi, SMA, quad band | €7 | ||
