M-Bus data centre / M-Bus remote display
DR 20 / DR 20 FA (Discontinued model)
Product categories
M-Bus data centre / M-Bus remote display
System technology
Your benefits
- Modular design:
Can be used as data centre, remote display or level converter - M-Bus data centre, remote display or level converter with integrated modem connection:
Remote meter reading without access to the object - Transparent operation:
Unchanged transfer of read-out data to the communication device - Several interfaces (RS232 and RS485) for PC communication:
Greater distances (up to 1000 m via RS485) possible between M-Bus data centre, remote control or level converter and PC
Applications
- Remote supply and remote reading of M-Bus end devices
- On-site read-out of M-Bus meters via keypad and LCD
Properties
- M-Bus data centre, remote display or level converter for 60 M-Bus end devices with a standard load of 1,5 mA
- Can be used as level converter for RS232 and RS485
- Read-out via keypad and display (except for level converter) or RS232 interface
- Transfer rates: 300 to 9’600 baud
- M-Bus protocol according to EN 1434-3
- Galvanic separation
- Collision detection
- Echo cancellation
- Bit recovery (restoration of the bit times)
- Continuous short-circuit protection
- Automatic switch-off for excessive current flow
- Integrated mains adapter
- Additional for M-Bus data centre DR 60
- Periodic storage of meter data possible (interval of between 1 minute and 1 year)
- 512 KByte flash memory
Product information
Technical Data
| Mains adapter | |
|---|---|
| Input | 230V 50Hz AC |
| Output | 11W |
| Housing | |
|---|---|
| Dimensions (WxHxD) | 166x190x112 mm |
| Protection class | IP53 (sealed PG screw connections) |
| Material | PS |
| Colour | Light grey (similar to RAL 7035) |
| Weight | app. 1,3 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 50104 ENV 50204 EN 61000-4-4 |
Terminals
| M-Bus | (+), (-) | 3 terminal pairs |
| RS485 | S+, S- | Terminal pair for RS485 interface |
| RS232 | GND, TX, RX | Terminals for RS232 interface (PC) |
| 230V | N, L, E | Terminals for voltage supply 230 V AC |
M-Bus specifications
| Execution | DR 60 / DR 60 FA / DR 60 PW | |||
|---|---|---|---|---|
| Parameter | min. | typ. | max. | |
| Max. no. of connectable devices (load unit 1,5 mA each) | - | - | 60 | |
| Internal resistance | Ohm | - | - | 15 |
| Display alarm current | mA | 90 | 100 | 110 |
| Excessive current switch-off | mA | 130 | 140 | 160 |
| Bus voltage MARK (normal operating current) | V | 38,5 | 39 | 39,5 |
| Bus voltage SPACE (normal operating current) | V | 12 | 12,5 | 13 |
| Bit threshold end device > centre | mA | - | 7 | - |
| Collision threshold | mA | - | 30 | - |