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
Power Input
Temperature Range
0 .. 55 °C
M-Bus Voltage (without load)
40V
M-Bus Idle Current
Max. M-Bus Quiescent Current
M-Bus Current (C20)
M-Bus Current (C3)
M-Bus Quiescent Current
Bus Impedance
approx. 10 Ω
M-Bus Standby Current
max. 375mA bei DR001 (250 standard load)
max. 180 mA bei DR002 (120 standard load)
Overcurrent Threshold
500mA (DR001), 250mA (DR002)
Internal Bus Resistance
Bus Extension
Transmission Speed
Transmission Speed Optical
Bit Recovery
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)
LED Status Indicators
Control Panel
Display
Memory
512 kB FLASH (optional 4MB)
512 kB static RAM
Security
battery-backed real-time clock
Watchdog module
Operating Controls
Membrane keypad with 20 keys
LCD with 4 lines and 16 columns
Interfaces
M-Bus, RS232C, Modem intern, Modem extern
Screw Terminals
Terminals
Connectors
Data Memory
Dimensions H x W x D
Protection
Downloads
Software
Firmware WebGUI Version 1 (Broadway)
Firmware WebGUI Version 2 (HTML5)
Order 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)
Additional Accessories
Order Number
Description