Datasheet

Electrical connection
Leuze electronic MA 248i 31
TNT 35/7-24V
7.2 Electrical connection
The MA 248i features two M12 connectors/sockets for voltage supply; each is A-coded.
The voltage supply (PWR IN) as well as the switching inputs/outputs (PWR OUT or PWR IN)
are connected there. The number and function of the switching inputs/outputs is dependent
on the connected end device. Two additional M12 sockets are used for connection to the
fieldbus. Both of these connections are D-coded.
An internal RS 232 interface is used for connecting the respective Leuze device. Another
internal RS 232 interface functions as a service interface for configuring the connected
device via a serial null modem cable.
Figure 7.2: MA 248i connections
Described in detail in the following are the individual connections and pin assignments.
Attention!
Voltage supply and bus cable are coded in the same way. Please observe the printed con-
nection designations
7.2.1 PWR IN – voltage supply / switching input/output
PWR OUT
VOUT
1
2
3
4
SWIO_2
SWIO_1
GND
FE
5
PWR IN
SWIO_1
SWIO_2
3
2
1
4
5
GND VIN
FE
HOST / BUS IN
TD+
1
2
3
4
RD+
RD-
TD-
LEUZE Device
BUS OUT
TD+
1
2
3
4
RD+
RD-
TD-
M12 connector
(A-coded)
M12 socket
(A-coded)
M12 socket
(D-coded)
M12 socket
(D-coded)
PWR IN (5-pin connector, A-coded)
Pin Name Remark
1 VIN Positive supply voltage +18 … +30VDC
2 SWIO_2 Switching input/switching output 2
3 GND Negative supply voltage 0VDC
4 SWIO_1 Switching input/switching output 1
5 FE Functional earth
Thread FE Functional earth (housing)
Table 7.1: PWR IN pin assignment
PWR IN
SWIO_1
SWIO_2
3
2
1
4
5
GND VIN
FE
M12 connector
(A-coded)