Festo DGE-ZR-RF Serie Instrucciones De Utilizacion página 45

DGE− −ZR−RF
Take into account the following plan for positioning the proximity switches:
S
M
Fig. 25
(M) = Motor
(X) = Interface to emergency stop circuit
(Z) = Interface to controller
W = Mechanical end position
S = Safety limit or switching point of the safety limit switches
H = Switching point of the hardware limit switches
R = Reference point position
O = Positioning limits of the software controller
O/2 = Stroke centre
d = Switch lug length
h = Stroke reserve
n = Braking distance 1
r = Braking distance 2
x = Distance of the reference point switch from the hardware limit switch close to the motor
If proximity sensors are used as limit switches:
Use proximity sensors with normally−
S
closed function. (N.C.= normally closed)
These will protect a DGE with a fractured
proximity−sensor cable against
overrunning the end position.
To prevent soiling:
Use cover rails (accessories) in all unused grooves.
S
Festo DGE− −ZR−RF 0906d English
H
R
S x
W
n
r
d
h
O/2
O
(X)
d > x
S
W
d > h
n
r
h = n + r
h
(Z)
O
Fig. 26
45