Electrical connection
42
MA 258
i
Leuze electronic
7.5.2
Service interface (internal)
Figure 7.6:
RS 232 service switch and service interface
Following activation, this interface enables access via the RS 232 to the connected Leuze
device and the MA for configuration using the 9-pin Sub-D. The connection between the
fieldbus interface and the device interface is switched off during access. The fieldbus itself
is, however, not interrupted as a result.
The service interface can be accessed once the MA 258
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. A hardware handshake via RTS, CTS is not
supported at the service interface.
Figure 7.7:
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.
Notice!
To configure the devices connected to the external interface, e.g., BCL 8 (JST plug connec-
tor "X30"), a cable specially configured for this purpose is necessary. The service switch must
be in the "DEV" or "MA" position (Service Leuze device/MA).
5 GND
3 TxD
2 RxD
GND 5
TxD 3
RxD 2
1
1
PC/terminal
COM interface
MA 258
i
Service interface
