Displays, Connections and Controls
30
Operating Manual XCx 300 / 500 / 540 Version 09/08
4.9
X1 RS422 Interface for Connecting Operator Panels and Displays
X1 8-pin screw terminal block
Designation
Explanation
+5 V
Supply v5 V
0 V
Supply voltage 0 V
TD-
Transmitted data minus
TD+
Transmitted data plus
RD-
Received data minus
RD+
Received data plus
Not connected
SHLD
Shield
4.10
X2 Connection for Supply Voltage, Direct I/O and BUSY Contact
X2 8-pin screw terminal block
Designation
Explanation
BUSY contact (PLC running)
+24 V
Supply voltage DC +24 V
M
Supply voltage ground
+24 V ext
Supply voltage DC +24 V direct
inputs/outputs
Mext
Supply voltage ground direct inputs/outputs
I/O 1
Direct input/output* 1
I/O 2
Direct input/output* 2
*Connection can be used as input or output
4.11
Mode Switch
The mode switch is a three-position key-operated switch. These three
positions determine the start up behaviour of the controller. The key-
operated switch prevents unauthorized manipulation of the start up
behaviour.
Mode switch
Position Explanation
PROG
PLC stop, programming mode
(Only in this position is the RESET
button operational)
WARM
PLC warm start
COLD
PLC cold start
(reinitialisation retain variables)