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PWR
LED
IN
LED
OUT
LED
ACT
LED
LOCK
LED
ACK
LED
State Description
GN
- GN
GN
bl
RUN Actuator in safe area, device waiting
for the reset command. O3 output
blinking.
GN
- GN GN GN
bl
RUN Actuator present, guard closed and
locked, device waiting for the reset
command. O3 output blinking.
GN
- GN
GN RUN
Actuator in safe area, reset command
accepted. O3 output active.
GN - - GN GN GN RUN Actuator present, guard closed and
locked, reset command accepted.
O3 output active.
GN GN GN GN GN GN RUN Actuator present, guard closed and
locked, reset command accepted,
safety inputs present. O3, O4, OS1
and OS2 outputs active.
5.5 Description of the operation of versions NS •7••••••
f4
f1
f2
f3
OS1
OS2
IS2
IS1
IN
O3
OUT
CODE
ACT
LOCK
I5
ACK
f5
f6
IE1
IE2
f0
PWR
A2A1
I3
O4
With versions NS •7••••••, function f5 checks
whether the double reset command is present at
inputs I3 and I5 (falling edge). The double reset
command is used in situations in which parts of the
danger area cannot be seen from the external reset
position. In these cases, an additional reset device
is installed within the danger area in a position at
which the area is completely visible. The first reset
command at input I3 (internal reset) is only accept-
ed if the actuator is not inserted (open guard). The
second reset command at input I5 (external reset)
is only accepted if the actuator is inserted (closed
guard) and a time not longer than t
TO
has elapsed af-
ter activation of the internal reset command. Func-
tion f3 activates safety outputs OS1 and OS2 if the
following three conditions are satisfied: actuator
locked (f4), safety inputs active (f1) and double re-
set command present (f5). If the actuator is not inserted and the device is waiting for
the internal reset command (I3), output O3 alternates between high and low and the
ACK LED (green) flashes with a frequency of approx. 4 Hz (FAST); once the internal re-
set command (I3) has been accepted and the device is waiting for the external reset
command (I5), output O3 alternates between high and low and the ACK LED (green)
flashes with a frequency of approx. 2 Hz (SLOW). If the second (external) reset com-
mand does not trigger within the maximum time t
TO
, the device returns to its initial
state and again waits for the internal reset command. As soon as the external reset
command is accepted, output O3 is activated and the ACK LED (green) flashes. The
reset command remains active until the actuator is removed. The activation of an ad-
ditional release device (escape release or auxiliary release) fully interrupts the reset
process.
PWR
LED
IN
LED
OUT
LED
ACT
LED
LOCK
LED
ACK
LED
State Description
GN
-
GN
bl
(FAST)
RUN Device waiting for the internal reset
command. Output O3 flashes with a
frequency of approx. 4 Hz.
GN
- - - GN
bl
(SLOW)
RUN Actuator not present, internal reset
command accepted. Output O3
flashes with a frequency of approx.
2 Hz.
GN
- GN
GN
bl
(SLOW)
RUN Actuator in safe area, internal reset
command accepted, device waiting
for the external reset command. Ou-
tput O3 flashes with a frequency of
approx. 2 Hz.
GN
- GN
GN RUN Actuator in safe area, external reset
command accepted. O3 output ac-
tive.
GN - - GN GN GN RUN Actuator present, guard closed and
locked, external reset command ac-
cepted. O3 output active.
GN GN GN GN GN GN RUN Actuator present, guard closed and
locked, external reset command ac-
cepted, safety inputs present. O3,
O4, OS1 and OS2 outputs active.
5.6 Replacement of the actuator
Attention: The machine manufacturer must restrict access to the sensor pro-
gramming mode to authorised personnel only.
Via input I3 it is possible to replace the coded actuator with a second actuator at any
time. This operation is repeatable an unlimited number of times. After programming
has been completed, the sensor will recognise only the actuator code corresponding
to the last executed programming operation.
1) Check that the device is supplied with rated voltage.
2) With the first actuator not inserted and not locked, activate programming input I3
by applying voltage Ue1 (see paragraph TECHNICAL DATA). The device sets to the
programming mode and the IN LED flashes orange; it disables all OS1, OS2, O3,
O4 outputs.
3) With the I3 input enabled, insert the second actuator. Acquisition of the second
actuator is confirmed by the IN LED switching off and by four flashes of the ACT
LED.
4) Deactivate input I3. The device will automatically set to restart and the first actuator
will no longer be recognised.
The second actuator must be suitably fixed to the guard as described in paragraph
INSTALLATION INSTRUCTIONS.
This operation must not be carried out as a repair or maintenance operation. If the de-
vice ceases to function correctly, replace the entire device and not just the actuator.
5.7 Reset input
The following error states due to a failure external to the device can be rest using
the I3 input:
- a short circuit or overload of safety outputs (OS1, OS2),
- a short circuit between a safety output and the supply voltage,
- an excessive misalignment between the device and the locked actuator.
5.8 Series connection with safety modules
It is possible to install multiple cascade-connected devices, up to a maximum of 32
units, whilst maintaining safety category 4 / PL e according to EN ISO 13849-1 and in-
tegrity level “Maximum SIL 3” according to EN IEC 62061.
Check that the PFHD value and MTTFD value of the system consisting of the cascade
of devices and the entire safety circuit meet the requirements of the SIL/PL level re-
quested by the application.
NS
NS
NS
CS
CS AM
CS FS
OS1 OS2
IS1 IS2
IS1 IS2
OS1 OS2
IS1 IS2
OS1 OS2
Ixx Ixx Ox
IE1
IE2
VN NS-F4•
VN NS-F4•
VN NS-F4•
+ Vcc
IE1
IE2
IE1
IE2
NS
NS
NS
OS1 OS2
IS1 IS2
IS1 IS2
OS1 OS2
IS1 IS2
OS1 OS2
OS1 OS2
VN NS-F4•
VN NS-F4•
VN NS-F4•
CS MP
Ixx Ixx
IE1
IE2
IE1
IE2
IE1
IE2
Monitoring function - actuator locked: 2 chan-
nels / Category 4 / up to SIL 3 / PL e
Single-channel control for locking function of
the actuator:
1 channel / Category 2 / up to SIL 2 / PL d
Monitoring function - actuator locked: 2 chan-
nels / Category 4 / up to SIL 3 / PL e
Dual-channel control for locking function of
the actuator:
2 channels / Category 4 / up to SIL 3 / PL e
When connecting the switches in series as described above, observe the following:
- Connect the inputs of the first device in the chain to the supply voltage.
- The OS1 and OS2 safety outputs of the last device in the chain must be connected
to the safety circuit of the machine.
- Where a safety module is used, check that the properties of safety outputs OS1/
OS2 are compatible with the safety module inputs (see paragraph INTERFACING).
- Respect the stray capacitance limits on the output lines indicated in the electrical
data (see paragraph TECHNICAL DATA).
- Check that the response time of the cascade meets the requirements of the safety
function to be implemented.
- The response time of the cascade must be calculated taking into account the re-
sponse time of every single device.
5.9 Operating states
PWR
LED
IN
LED
OUT
LED
ACT
LED
LOCK
LED
EDM
a
State Description
- - - - - - OFF Device switched off.
GN/RD
bl
GN/RD
bl
GN/RD
bl
GN/RD
bl
GN/RD
bl
GN/RD
bl
POWER
ON
Internal tests upon activation.
GN - -
GN RUN Safety inputs of the device not ac-
tive.
GN GN
RUN Activation of safety inputs.
GN GN/OG
bl
-
RUN Safety inputs incoherence. Recom-
mended action: check for presence
and/or wiring of inputs.
GN
RD
bl
RUN Incoherence of solenoid activation
inputs IE1, IE2.
Recommended action: check for
presence and/or wiring of inputs.
GN
OG
bl
RUN Auxiliary release activated.
Deactivate the auxiliary release to
lock the actuator
GN
GN
RUN Actuator in safe area. O3 signalling
output active.
GN
GN/OG
bl
RUN Actuator in limit area. Recommend-
ed action: move actuator closer.
GN
GN GN - RUN Actuator in safe area and locked; O3
and O4 outputs active.
GN GN GN GN GN - RUN Mode 1
Activation of safety inputs IS1, IS2.
Actuator in safe area and locked. O3,
O4, OS1 and OS2 outputs active.
GN GN GN GN
- RUN Mode 2
Activation of safety inputs IS1, IS2.
Actuator in safe area. O3, OS1 and
OS2 outputs active.
GN OG OG GN GN - RUN Mode 3.
Actuator present, guard closed and
locked, IS1 enabled, IS2 disabled,
OS1 enabled, OS2 disabled
GN GN OG GN - - RUN Mode 3.
Actuator present, guard closed and
not locked, IS1 and IS2 enabled, OS1
disabled, OS2 enabled
GN/OG
bl
RUN Rapid blinking (5 Hz): supply voltage
too high.
Slow blinking (1Hz): temperature at
the limit of the admissible range
GN
RD
bl
ERROR Error on safety outputs. Recom-
mended action: check for any short
circuits between the outputs, out-
puts and ground or outputs and pow-
er supply, then restart the device.
GN - - RD
bl
- - ERROR Actuator detection error. Check the
physical integrity of the device and,
in case of failure, please replace the
entire device. If undamaged, realign
the actuator with the device and re-
start the device.
RD - - - - - ERROR Internal error. Recommended action:
restart the device. If the failure per-
sists, replace the device.
RD
bl
- - - - - ERROR Temperature error outside the per-
missible range
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