Device description
Leuze electronic
MA 248
i
21
TNT
35/7-2
4
V
Service interface
The service interface can be accessed once the MA 248
i
housing cover has been removed
and features a 9-pin Sub-D connector (male). A crossed RS 232 connection cable is required
to make the RxD, TxD and GND connections.
Figure 4.3:
Connecting the service interface to a PC/terminal
Attention!
For the service PC to function, the RS 232 parameters must be the same as those of the
MA. The Leuze standard setting of the interface is 9600bd, 8N1 and STX, data, CR, LF.
4.5
Fieldbus systems
Various product variants of the MA 2xx
i
series are available for connecting to different
fieldbus systems such as PROFIBUS DP, PROFINET-IO, DeviceNet and Ethernet.
4.5.1
PROFINET-IO
The MA 248
i
is designed as a PROFINET-IO device (acc. to IEEE 802.3). It supports a trans-
mission rate of up to 100 Mbit/s (100Base TX), full duplex, as well as auto-negotiation and
auto-crossover.
The functionality of the device is defined via parameter sets which are clustered in modules.
These modules are contained in a GSDML file.
Each MA 248
i
is sealed with a unique MAC-ID. This information is used to assign a unique,
plant-specific device name ("NameOfStation") to the device via the "Discovery and Config-
uration Protocol (DCP)". When configuring a PROFINET-IO system, the assignment of the
device names to the configured IO devices creates a name-based relationship for the partic-
ipating IO devices ("device naming"). Further information can be found in section "Step 6 –
Configuration of the device name - naming the device" on page 69.
The MA 248
i
features multiple M12 connectors / sockets for the electrical connection of the
supply voltage, the interface and the switching inputs and outputs. Additional information
on the electrical connection can be found in chapter 7.2.
5 GND
3 TxD
2 RxD
GND 5
TxD 3
RxD 2
1
1
PC/terminal
COM interface
MA 248
i
Service interface