Festo DGE-ZR-RF Serie Instrucciones De Utilizacion página 41

DGE− −ZR−RF
Installing external accessories
Preparations for fitting the external accessories
Check to see which interrogation variant is required for your application.
S
Inter
rogation
variant
Necessity
of scanning
elements
Mounting
require
ments
Fig. 19
Use scanning elements with the following features:
S
Scanning
element
Safety
limit
switch
Hardware
limit
switch
Software
limit
switch
Reference
point
switch
Fig. 20
Festo DGE− −ZR−RF 0906d English
1. The controller requires a
separate reference point
1 reference point switch
2 hardware limit switches
Reference point switch
overlaps with a hardware limit
switch. The hardware limit
switch overlaps with the safety
limit switches.
Version Purpose
Mechanical Triggering the
roller switch EMERGENCY STOP
with switching function
function:
N/C contact
Switching Triggering the maximum
function: braking
N/C contact (emergency ramp)
Limits of the positioning
range through
programmed control
Switching Definition of a basis
function: point for the
N/O contact DGE−...−ZR−RF
2. The controller
does not require a
separate reference
point
Only 2 hardware limit
switches
Hardware limit
switches as
reference point
switches overlapping
a safety limit switch
Remark
In accordance with accident
prevention regulations
Will only prevent conse
quent damage in the case
of programming errors
Still enables damage−free
braking in the case of
programming errors
Are not usually overrun
Regular checks of the
position are recommended
Additional to
points 1 and
2. irrespective
of the type of
controller
Always 2 safety
limit switches
With safety
distance from
mechanical end
position
41