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4.7 Device-actuator alignment
Attention: Although the device
is designed to facilitate alignment
between the device and its actuator,
excessive misalignment could
cause damage to it. Periodically
check the correct alignment be-
tween the device and the respective
actuator.
Maximum admissible misalignment from hole axis, for rigid doors: +/-2 mm (vertical
and horizontal).
The actuator must not knock on the outside of the actuator inlet area, and must not be
used as a centring device for the mobile protection.
In the event of application on hinged doors, check that the radius between the actuator
axis and the axis of the hinge fitted to the door is greater than 150 mm.
Do not use a hammer for the adjustments, unscrew the screws and adjust the device
manually, then tighten it in position.
This device is not suitable for applications in which the moving door with immovably
fastened actuator permits misalignments of an entity that prevents the pin entering the
corresponding hole in the device with the door completely closed.
The device is provided with a through hole for inserting the actuator. If used in
dusty environments, we recommend not to obstruct the outlet hole opposite to the inlet
one. This will allow any dust entering the hole to exit from the opposite side.
4.8 Escape release button
Some of the device versions are equipped with a release button in order to allow
any personnel accidentally trapped inside the machine to get out. This button,
complying with the EN ISO 14119 standard, directly acts on the lock mechanism and
immediately releases the actuator regardless of the state of the device. Pressing this
button causes:
- in mode 1: immediate deactivation of the safety outputs OS1, OS2 and of the
signalling output O4;
- in mode 2: immediate deactivation of the signalling output O4 only;
- in mode 3: immediate deactivation of the safety output OS1 and of the signalling
output O4;
This escape release button unlocks the guard even if the device is not powered
on.
For correct installation of the escape release button, the following instructions are to
be observed.
- The release button must be clearly visible from inside the
machine.
- Button activation must be easy, immediate and independent
from the machine operating status; to help you recognise
the button and explain its function, identification stickers are
available in various languages (contact the sales department for
detailed information).
- For an operator standing outside the machine, it must be
impossible to activate the release button when the door is closed.
- To guarantee correct operation and easy resetting, a distance
ranging from 10 to 35 mm must be kept between the wall from
where the button protrudes and the release button.
- The actuation path of the release button must always be kept
clean. since dirt or chemical products could compromise the
device operation.
- The personnel concerned must be adequately trained on
correct button operation, so as to avoid any improper use (i.e.
the button must not be used as a clothes-hook).
- The release button must not be used as a machine emergency stop.
For installation on walls thicker than 20 mm, extensions for the release button are
available.
For correct installation of the extensions, the following instructions are to be observed:
- do not exceed an overall length of 500 mm between the release button and the
device;
- always use medium resistance threadlocker adhesive on every threaded connection
between button, extensions, and device;
- avoid twisting or bending the release button. Where necessary, use an appropriate
sliding guide (pipe or bushing), if the button and its extensions have a length greater
than 100 mm;
- tightening torque of button and extensions: from 4 to 5 Nm.
4.9 Auxiliary release with a tool or a lock
Some of the device versions are provided with an auxiliary release in order to allow
an easy installation (release with a screwdriver) or the opening only to authorised
personnel (lock release). Both these mechanical release devices act inside the device
like the escape release button described previously. Therefore they also unlock the
guard in case of power failure. These release devices may only be operated by a
machine maintenance engineer who has received adequate training on the dangers
deriving from their use.
4.9.1 Use of the auxiliary release with a screwdriver
- Unscrew the locking screw with a Ph1 cross-head screwdriver
- Turn the hexagonal-hole bush clockwise by 180°
- Do not force the bush beyond 180°
- To avoid any improper use of the auxiliary device with a tool, it is
advisable to seal the device through the appropriate hole found in
the upper part, or to seal the screw cross head with a few drops
of paint.
- After each actuation, it is advisable to reseal the device.
4.9.2 Use of the auxiliary release with a lock
- Open the protection cap.
- Insert the key supplied with the device and turn
clockwise by 180°.
- Do not force the key beyond 180°.
- Each time after the key is extracted, close the rubber
cap.
- The release key must only be available to the machine
maintenance engineer and kept in a secluded place.
- The release key must not be available to the machine operator.
- Never leave the release key inserted in the device during normal machine operation.
For particular applications, versions are available without any auxiliary release
device.
4.10 Electrical connections of the device
Attention: The device is fitted with OSSD type solid state electronic outputs.
These outputs behave differently from electromechanical contacts. Use and installation
of a safety device with solid state outputs is only permitted if all characteristics of this
particular type of outputs are known in detail.
4.10.1 Internal connections
To open the device cover, use a Ph2 cross-head screwdriver, and tighten the screws
to a torque between 0.8 and 1.2 Nm.
10
11 12 13 14 15 16 17 18
1
2 3 4 5 6 7 8 9
1
2
3
4
5
6
7
8
9
10
11
12
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
Internal
terminal
strip
for switch
Connection
M23 con-
nector
12-pole
M12 con-
nector,
12-pole
M12 con-
nector,
8-pole,
stand-alone
connection
M12 con-
nector,
8-pole,
series
connection
with Y con-
nectors
1
A2
Supply input 0 V
3
3
3
3
2
B2
0 V auxiliary supply output
3
3
3
3
3
I4
Solenoid activation input for
single channel mode (c)
10
10
8
8
4
O3
Signalling output, actuator
inserted (d)
5
5
2
/
5
O4
Signalling output, actuator
inserted and locked (b) (d)
9
9
5
5
6
I3
Actuator programming input
/ reset
8
8
6
/
8
IE1
Solenoid activation input for
double channel mode
10
10
/
/
9
IE2
Solenoid activation input for
double channel mode
12
12
/
/
10
A1
Supply input +24 Vdc
1
1
1
1
11
B1
Auxiliary supply output
+24 Vdc, 8 A max.
1
1
1
1
12
IS1
Safety input
2
2
/
2
13
IS2
Safety input
6
6
/
6
14
I5
EDM input (a)
11
11
/
/
15
OS1
Safety output
4
4
4
4
16
OS2
Safety output
7
7
7
7
Important: terminals 7, 17, 18, of the internal terminal strip must not be used.
(a)
Available in NG 2D••5•••
version only.
(b) For NG 2D••6•••
: the output signals the fault condition of the device.
(c) In single-channel actuation mode, inputs IE1 and IE2 must be short-circuited.
(d) For NG 2D
••7•••: the signalling outputs O3 and O4 have a negative working logic (active-low
signal).