Sutron P Line, User Manual

Page: 49 / 102

P Line Touch Panel Interfaces of the Device
49
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 4-57.