P Line Maritim HMI
Interfaces of the Device
37
4.3.1
RS-422 / RS-485 (X14)
The interface standard RS-422 / RS-485 is suitable for point-to-point and multi-
point connections.
The wires belonging together are marked with „A“ and „B“. Some descriptions re-
fer to the pins with „-“ and „+“ , where A = - and B = +.
The interface is assigned to the port COM4. At an image version before 181 and
operating system Windows CE 6.0 the port COM1 is assigned.
4.3.1.1
Pin Assignment
Figure 4-4 9 pin D-SUB male connector strip
Connector in the operating device: 9 pin D-SUB male connector strip.
Signal Logic 1
U
A
- U
B
<= -0.3 V i.e. (U
A
< U
B
)
Signal Logic 0
U
A
- U
B
>= +0.3 V i.e. (U
A
> U
B
)
Table 4-3 Pin assignment RS-422/RS-485
Pin
Designation
Function
1
SGND
Signal Ground
2
T(B)
Transmitted Data
+
P
3
T(A)
Transmitted Data
-
N
4
R(A)
Received Data
-
N
5
R(B)
Received Data
+
P
6
nc
Not Connected
7
nc
Not Connected
8
nc
Not Connected
9
nc
Not Connected
NOTICE
The D-SUB connector strips must be shielded sufficiently. See chapter “Shield-
ing D-SUB Connectors“ on page 3-47.
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