Operation - pizzato HX-Serie Bedienungsanleitung

4.4 Electrical connections
4.4.1 Versions with mechanical contact block
Contacts
Versions with cable
black
NC
black-white
red
NC
red-white
brown
NO
blue
purple
NO
purple-white
yellow/green
Attention: The safety circuit must be connected to the NC contacts. The NO
auxiliary contacts can be used for signalling functions.
4.4.2 Versions with electronic contact block
Connection Versions with cable
A1 brown
IS1 red
A2 blue
OS1 red-white
O3 black
IS2 purple
OS2 black-white
purple-white
not connected
Legend: A1-A2 = supply OS1-OS2 = safety outputs
IS1-IS2 = safety inputs O3 = signalling output
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.
4.5 Adjustment of the switching point
Adjustment of the switching point can be carried out using a flat-head screwdriver
(max. 4.5 mm), used on the screw that can be reached via the hole on the hinge axis.
The switches are supplied with the adjusting screw unregistered. It is therefore the
responsibility of the installer to adjust the switching point correctly.
Rotating the adjusting screw clockwise reduces the switching point; rotating the screw
counterclockwise increases the switching point. The switching point of the contacts
indicated in the travel diagrams can be adjusted by ± 1°.
The maximum torque that can be applied to the adjusting screw is 0.2 Nm.
HX •L22-•••
(2NC+2NO)
NC contacts opening travel
OS safety outputs opening travel
NO contacts closing travel
Positive opening travel
Maximum travel
Attention: After 1,000,000 guard openings, angular travels may increase by up
to +1.5°.
4.6 Checking the switching point
that the switching point of the switch is set so that no
openings are large enough to allow upper or lower
limbs, or other body parts, to be inserted and reach
dangerous machine parts before they are stopped, or
have otherwise entered a safe state.
The dimensions of the openings on the guards, and
the relative distances from the dangerous points
requiring protection, must comply with the provisions
of EN ISO 13857: check the switching point and, if
necessary, repeat the adjustment (see paragraph
ADjUSTMENT OF THE SWITCHING POINT).
4.7 Sealing the adjustment hole of the switching point
Attention: After adjusting the switching point, always seal
the hole with the appropriate protection cap supplied with the
device. Failing to insert the cap can allow dusts and liquids to
penetrate the electrical contacts, and impair device function.
4.8 Final cleaning
Once installation is complete, use the cloth included in the pack for final hinge
cleaning, for an optimal product aesthetic.

5 OPERATION

Once the hinge switch is installed on the machine and opening guard, and electrically
connected (as described in paragraph "INSTALLATION INSTRUCTIONS"), opening
the guard must initiate a stop of the machine and related dangerous moving elements.
It must be possible to subsequently restart the machine, only once the guard is closed.
Versions with M12 connector
1
2
3
4
2
5
6
3
7
8
/
Versions with M12 connector
1
2
3
4
2
5
3
6
7
8
TRAVEL DIAGRAMS
Electronic
Mechanical contact block
contact block
HX •H22-••• HX •EE1-•••
(2NC+2NO) (2IS+2OS+1O3)
1.5° 1.5°
3° 0.5°
6° 6°
180° 180°
Attention: Once adjustment is complete, check
5.1 Definitions and operating states (electronic HX •EE1-••• versions only)
Device states:
- OFF: device is off, not powered.
- POWER ON: state immediately following switch on, during which the device carries
out internal tests.
- RUN: state in which the device is in normal operation.
1 - ERROR: safety state in which the outputs are disabled. Can indicate the presence
7
of an internal safety device failure, a short circuit between the safety outputs (OS1,
6
OS2), a short circuit between a safety output and the ground, or a short circuit
5 between a safety output and the supply voltage. To exit this state, the device must
4
8
be restarted.
5.2 Functional description (electronic HX •EE1-••• versions only)
Following correct installation in accordance with the method described in the
"INSTALLATION INSTRUCTIONS" paragraph, the safety device can be powered. The
diagram below represents the 4 logic functions which interact inside the safety device.
1
7
6
5
4
8
In the initial "POWER ON" state, the safety device f0 function carries out an internal
self diagnosis. When this terminates successfully, the device switches to the "RUN"
state. If the test is not passed because of an internal failure, the device enters the
"ERROR" state.
The "RUN" state is the normal operation state: the f1 function evaluates the state of
inputs IS1, IS2; at the same time the f2 function checks closure of the contacts of the
switch inside the device.
When these two conditions are given, the f3 function of the device enables the safety
outputs OS1 and OS2.
The contacts of the switch inside the device of monitored not only for state, but for
coherence; the contacts are generally actuated simultaneously with closure of
the hinge. In the event of deactivation of just one of the two contacts, the device
deactivates the safety outputs and signals a non-coherent condition of the contacts,
via the ACT LED flashing green/orange. The hinge must open fully and re-close, for
the safety outputs to reactivate.
The device inputs are also normally actuated simultaneously, and so are monitored
both for state and coherence. In the event of deactivation of just one of the two inputs,
the device deactivates the safety outputs and signals a non-coherent condition of the
inputs via the IN LED flashing green/orange. In order to reactivate the safety outputs,
1.5°
both inputs have to be deactivated and subsequently reactivated.
In the RUN state, function f0 carries out internal test cycles in order to identify any
/
failures. Detection of any internal error switches the device to the "ERROR" state
/
(PWR LED continuously red) which deactivates immediately the safety outputs.
The "ERROR" state can be reached also where short-circuits between the safety
180°
outputs (OS1, OS2), or a short circuit of an output towards ground or towards the
supply voltage, are identified. In this case also, the F3 function deactivates the safety
outputs and the error state is indicated by the OUT LED flashing red.
The O3 signalling output activates during the "RUN" state, in conjunction with closure
of the contacts inside the hinge, independently of the state of the IS1 and IS2 inputs.
The state of this output is displayed via the ACT LED.
5.3 Connection in series with safety modules (electronic HX •EE1-••• versions
only)
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
integrity level SIL CL 3 according to EN 62061.
Check that the PFH and MTTF
of devices and the entire safety circuit meet the requirements of the SIL/PL level
requested by the application.
7/20
ACT
f2
IN
f1 f3
IS1
IS2
f0
PWR
A1 A2
values of the system consisting of the cascade
d
+ Vcc
IS1 IS2
HX BEE1-••• O3
OS1 OS2
IS1 IS2
HX BEE1-••• O3
OS1 OS2
IS1 IS2
HX BEE1-•••
O3
OS1 OS2
Ixx Ixx
Pizzato Elettrica
PLC
CS series safety
module
O3
OUT
OS1
OS2