Rockwell Automation 2727-G7P20D3Q7 MobileView G750 Guard Machine Terminal - Manual (Page 23)

Publication 2727-UM002D-EN-P
Safety Precautions and Elements 2-5
Enabling Switch Operation
The actuating element consists of two symmetrically arranged slides.
The position of these slides is detected by electrical switches and
transmitted to the evaluation electronics.
Positions of Enabling Switch
For the enabling switch, the following switch sequences are possible:
A. Home position enabling panic home position (1-2-3-1)
B. Home position enabling home position (1-2-1)
The pushing of the actuating elements directly into the panic position
is evaluated in a way that the enabling position is skipped when the
actuating elements are released.
Home Position (1) enabling outputs are open
Enabling (2) enabling outputs are closed
Panic (3) enabling outputs are open
x u v
x y
Circuit 1
Circuit 2
Circuit 1
Circuit 2
Circuit 1
Circuit 2
Circuit 1
Circuit 2
Circuit 1
Circuit 2
Circuit 1
Circuit 2
Circuit 1
Circuit 2
Circuit 1
Circuit 2
Circuit 1
Circuit 2
Circuit 1
Circuit 2
1 2 3
Circuit X = open
Circuit X = closed
a)
b)
ZT1
ZT2
ZT1
ZT2
ZT1
ZT2
ZT1
ZT2
x u
x
v
y
1 2 3
ZT1, ZT2
ZT1, ZT2
ZT1, ZT2
ZT1, ZT2
a)
b)
1
2 3 1 2 3
Contact Travel Diagram