Electrical connection
Le
u
ze electronic
MA 20
8
i
27
TNT
35/7-2
4
V
7.2
Electrical connection
The MA 208
i
features two M 12 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 M 12 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 208
i
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-
M 12 connector
(A-coded)
M 12 socket
(A-coded)
M 12 socket
(D-coded)
M 12 socket
(D-coded)
PWR IN (5-pin connector, A-coded)
Pin
Name
Remark
1
VIN
Positive supply v18 … +30 V DC
2
SWIO_2
Switching input/switching output 2
3
GND
Negative supply voltage 0 V DC
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
M 12 connector
(A-coded)
