XCA 1100 / XCA 1200 Control Unit
20
Operating Manual XCA 1100 / XCA 1200
●
Version 12/17
4.1.6
X12
– RS 232 / RS 422 / RS 485 Interfaces
Table 7:
Pin assignment of
RS 232 / 422 / 485
interfaces X12
Screw block
terminal 10-pin
Pin
Designation
Explanation
1
SHLD
Shield RS 232
2
TxD
RS 232 transmitted data
3
RxD
RS 232 received data
4
M
ext
Ground for RS 232
5
M
ext
Ground for RS 422 / RS 485
6
TD-
Transmitted data / transmitted
and received data
7
TD+
Transmitted data / transmitted
and received data
8
RD-
Received data / bus
terminating resistors
9
RD+
Received data / bus
terminating resistors
10
SHLD
Shield RS 422 / RS 485
The RS interfaces are used to connect the operator panels and
displays. Connect RD+ with TD+ and RD- with TD- for activating the
bus terminating resistors when using the RS 485 interface. Both ground
pins for RS 232 and RS 485 have the same potential.
The screw terminal block is coded to prevent reversal of the interfaces
X11/X12.
Caution!
Do not connect open cables to serial ports (RS 232 and RS 485),
which are temporary connected to service computers for
example.
Open cables can cause linkages between transmitter and
receiver. This can lead to errors within the control.
If not needed, remove the plug from the control.