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M-Bus Digital-Master
Signal processor driven M-Bus Master /
Level- Converter for 120 or 250 slaves
- modular design:
- as Master with plug-in CPU-Board and integrated Master-Software
- as Repeater for bus system extension (more than 250 slaves, more cable length)
- as Level-Converter for RS232, RS485 or 20mA Current-Loop
- Baudrates: 300 to 9600 Baud
- Version for 38400 Baud with limited specifications
- Bit-Recovery (recovery of bit times)
- Overcurrent and short-circuit protection on the M-Bus
- external voltage and lightning protection on the M-Bus
- Echo cancellation and collision detection with break signalling
- Displays for power, data transmission, max. bus current and short-circuit
- 2 serial lines (modem and service)
Function of the M-Bus Central Unit
The M-Bus Central Unit scans the data from up to 250 meters in selectable intervals. All meters with M-Bus protocol according to EN1434-3 are automatically detected and read. This means that the user is saved the laborious task of configuring the measuring points in the software.
It is possible to operate the M-Bus Central Unit on-site by the keypad and the LCD, without any auxiliary devices. A PC can be used to read the stored meter data on-site or by a modem connection ( for example with a standard terminal software). The operating system is available in different languages and can easily be updated by software.
Technical Data
| Operating Voltage | 42 DC |
Power consumption | max. 25W |
Temparature range | 0 .. 55 °C |
M-Bus voltage (without load) | 40V |
M-Bus standby current | max. 375mA bei DR001 (250 standard load) max. 180 mA bei DR002 (120 standard load) |
Bus impedance | approx. 10 Ω |
Overcurrent threshold | 500mA (DR001), 250mA (DR002) |
M-Bus baud rate | 300 .. 38400 Baud |
Galvanic isolation | built-in |
Housing | Grey ABS plastic, protection class IP52 H x W x D: 85 x 200 x 240 mm |
| CPU | NEC V25 (8MHz) |
| Memory | 512 kB FLASH (optional 4MB) 512 kB static RAM |
| Security | batteriegepufferte Echtzeituhr Watchdog-Baustein |
Operating Controls | Folientastatur mit 20 Tasten LCD mit 4 Zeilen u. 16 Spalten |
Interfaces | M-Bus, RS232C, Modem intern, Modem extern |
Manuals
Flyer
Ordering information
| Order Number | Description |
|---|---|
| DR001 | Master with CPU/Soft (250 Slaves) |
| DR002 | Master with CPU/Soft (120 Slaves) |
| DR003 | Level-Converter RS232 (250 Slaves) |
| DR004 | Level-Converter RS232 (120 Slaves) |
| DR005 | Level-Converter RS485 (250 Slaves) |
| DR006 | Level-Converter RS485 (120 Slaves) |
| DR007 | Repeater for system extension |
| DR011 | Level-Converter TTY (250 Slaves) |
