LNS Alpha ST320 S2 - Page 38

4-14 CHAPITRE 4: ELECTRICS
ALPHA ST320 S2
A
E
F
B
C
D
H
G
3.2.4. PLC (Programmable Logic Controller)
a) Primary module
The PLC processes the signals from the interface, sensors and remote
control and sets the outputs according to the program logic.
Designation Description
A
Input contacts. All connected wires are labelled
B
Input contacts notation
C
Input signals indication LED. Indicates the status of inputs X0 to X43
D
PLC status indication LED
E
Communication port
F
Output signals indication LED. Indicate the status of outputs Y0 to Y27
G
Output contacts notation
H
Output contacts