Siemens LOGO! 24RC Manual page 178

Applications
Components used
K1
K2
S0 (NC contact)
S1 (NO contact)
S2 (NO contact)
S3 (NC contact)
S4 (NC contact)
S5 (NC contact)
Functional diagram of the LOGO! solution
Q2
I2
Open
Start switch
Stop switch
Gate is open
Close start
Q1
switch
Close start switch
Open start switch
Stop switch
I3
I6
Safety bar
Gate is closed I5
The open and close start switches move the gate in the
appropriate direction provided it is not already moving in
the other direction. Movement of the gate is halted by the
stop switch or the relevant limit switch. The gate is also
prevented from closing by the safety bar.
170
Master contactor
Master contactor
Stop switch
Open switch
Close switch
Open position switch
Closed position switch
Safety pressure bar
Open
I1
Start switch
I3
I4
x
x
I2
I1
x
T=
Q1
5 s
Open
x
T=
2 s
T=
Q2
5 s
Close
LOGO! Manual
A5E00067781 01
Q3
Flashing
light