EUCHNER CET-AX Serie Manual De Instrucciones página 9

Operating Instructions
Read Head CET-AX with Guard Locking and Guard Lock Monitoring
The mechanical key release must not be used
f
to lock the switch during maintenance work to
prevent activation of guard locking, for example.
Use a lockout mechanism for this purpose (see
chapter "Lockout mechanism (optional)")
Loss of the release function due to mounting
f
errors or damage during mounting.
Check the release function every time after
f
mounting.
Please observe the notes on any enclosed data
f
sheets.
Actuating mechanical key release
On devices with mechanical key release (can be
retrofitted), simply turn the key to release. Function
as for auxiliary release. For mounting, see the me-
chanical key release supplement.
Emergency unlocking (can be retrofitted)
Permits opening of a locked safety guard from out-
side the danger area without tools. For mounting,
see the mounting supplement.
Important!
It must be possible to operate emergency un-
f
locking manually from outside the protected area
without tools.
Emergency unlocking must possess a marking in-
f
dicating that it may be used only in an emergency.
The actuator must not be under tensile stress
f
during manual release.
The unlocking function meets all other require-
f
ments from EN ISO 14119.
Emergency unlocking meets the requirements of
f
Category B according to EN ISO 13849-1:2008.
Loss of the release function due to mounting
f
errors or damage during mounting.
Check the release function every time after
f
mounting.
Please observe the notes on any enclosed data
f
sheets.
Actuating emergency unlocking
Turn emergency unlocking clockwise until it clicks
f
into place.
Guard locking is released.
¨
To reset, press the detent bolt inward using a small
screwdriver or similar tool and turn the emergency
unlocking back.
The safety contacts in the evaluation unit are
switched off when emergency unlocking is actuated.
Use the safety contacts in the evaluation unit to
generate a stop command.
Detent bolt
71
Figure 3: Emergency unlocking
Escape release (optional)
Permits opening of a locked safety guard from the
danger area without tools (see Figure 14).
Important!
It must be possible to operate the manual re-
f
lease manually from inside the protected area
without tools.
It must not be possible to reach the escape
f
release from the outside.
The actuator must not be under tensile stress
f
during manual release.
The escape release meets the requirements of
f
Category B according to EN ISO 13849-1:2008.
Figure 4: Escape release
Actuating escape release
Press the red release knob to the stop.
f
Guard locking is released.
¨
Pull the knob out again to reset.
The safety contacts in the evaluation unit are
switched off when the escape release is actuated.
Use the safety contacts in the evaluation unit to
generate a stop command.
Wire front release (optional)
Release via a pull wire. Depending on the type of
attachment, the wire front release can be used as
emergency unlocking or escape release.
The following applies to non-latching wire front
releases.
If the release is to be used as emergency unlocking,
one of the following measures must be taken (see
EN ISO 14119:2013, section 5.7.5.3):
Install the release so that it can be reset only with
f
the aid of a tool.
Alternatively, resetting can be realized at the con-
f
trol-system level by means of a plausibility check
(status of the safety outputs does not match the
guard locking control signal), for example.
Independently of this, the specifications for emer-
gency unlocking from chapter "Emergency unlocking
(can be retrofitted)" are applicable.
Important!
The wire front release meets the requirements of
f
Category B according to EN ISO 13849-1:2008.
The correct function depends on the laying of
f
the pull wire and on the attachment of the pull
handle, and this is the responsibility of the plant
manufacturer.
The actuator must not be under tensile stress
f
during manual release.
Figure 5: Wire front release
9
Laying wire front release
Important!
Loss of the release function due to mounting
f
errors, damage or wear.
Check the release function every time after
f
mounting.
When routing the wire front release, ensure that
f
it operates smoothly.
Observe the min. bending radius (100 mm) and
f
minimize the number of bends.
The switch is not allowed to be opened.
f
Observe the notes on the enclosed data sheets.
f
Lockout mechanism (optional)
Important:
The lockout mechanism is not a safety function.
f
The correct function must be checked at regular
f
intervals.
The lockout mechanism can be used to prevent
maintenance personnel from being unintentionally
locked in the danger area, for example.
In locked position, the lockout mechanism prevents
activation of guard locking. The lockout mechanism
can be secured in locking position with up to three
locks (shackle diameter between 5 and 9 mm).
Using the lockout mechanism
Important!
Deactivate guard locking and open the safety
guard before using the lockout mechanism.
Before entering the danger area:
1. Open the safety guard
2. Press button, move lockout mechanism to
locking position (Figure 6, A and B) and secure
with lock (Figure 6, C)
Guard locking cannot be activated, and it must
¨
not be possible to start the machine.
Important!
Test this before entering the danger area.
Resetting the lockout mechanism
1. Open the safety guard if necessary
2. Remove the lock
3. Move lockout mechanism to basic position
(Figure 6, A)