M-Bus data centre / M-Bus remote display
DR 20 / DR 20 FA (Phasing out)
Product categories
M-Bus data centre / M-Bus remote display
System technology
Your benefits
- Modular design:
Can be used as data centre or remote display - M-Bus data centre or remote display with integrated modem connection:
Remote meter reading without access to the object - Transparent operation:
Unchanged transfer of read-out data to the communication device
Applications
- Remote supply and remote reading of M-Bus end devices
- On-site read-out of M-Bus meters via keypad and LCD
Options
- Periodic storage of meter data possible (interval from 1 minute to 1 year)
Properties
- M-Bus data centre or remote display for 20 M-Bus end devices with a standard load of 1,5 mA
- Read-out via RS232-PC or modem interface
- Transfer rates: 300 to 9’600 baud
- M-Bus protocol according to EN 13757-3
- Remote display with data filtering
- Remote control via 10-bit modem
- Echo cancellation
- Continuous short-circuit protection
- Automatic switch-off for excessive current flow
- DIN rail mounting
- 1 MByte flash memory
Product information
Technical Data
| Mains adapter | |
|---|---|
| supply | 10..28VDC, 5W 13..28VAC, 9W |
| Housing | |
|---|---|
| Dimensions (WxHxD) | 105 x 58 x 94 mm |
| Protection class | IP20 |
| Material | Noryl |
| Colour | Light grey (similar to RAL 7035) |
| Weight | app. 0.23 kg |
| Ambient conditions | |
|---|---|
| Operating temperature | 0 to + 45 °C |
| Storage temperature | -10 to + 60 °C |
| Humidity (non-condensing) | 10 to 70 % |
| EMC data | |
|---|---|
| Emission | DIN EN 50081-1 EN 55022 class B EN 60555 |
| Immunity | DIN EN 50082-2 ENV 50140 ENV 50204 EN 61000-4-4 |
Terminals
| M-Bus | (+), (-) | 3 terminal pairs |
| RS232 PC | 9-pin | Terminal pair for RS485 interface |
| RS232 MODEM | 9-pin | Terminals for RS232 interface (PC) |
| Grounding | Grounding | Terminals for grounding / GND |
| Power | V+, V- | Terminals for supply voltage (10…28 V DC, 13…27 V AC) |
M-Bus specifications
| Execution | DR 20 / DR 20 FA | |||
|---|---|---|---|---|
| Parameter | min. | typ. | max. | |
| Max. no. of connectable devices (load unit 1,5 mA each) | - | - | 20 | |
| Internal resistance | Ohm | - | - | 100 |
| Excessive current switch-off | mA | 100 | 60 | 70 |
| Bus voltage MARK (normal operating current) | V | 29 | 30,5 | 32 |
| Bus voltage SPACE (normal operating current) | V | 12 | 12,5 | 13 |
| Bit threshold end device > centre | mA | - | 7 | - |