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Rev.2 | MC36C safety magnetic sensors | © 2022 |
CARLO GAVAZZI Industri A/S
EN
5. Installation
The MC36CM actuator must be mounted on the moving guard of the machine, and the MC36CH magnetic sensor must
be fixed on a stationary part of the machine, by using two screws each (M4), on both sides of the enclosure.
All the screws and nuts must be properly blocked, in compliance with EN ISO 14119, e.g. by using self-locking screws,
rivets or similar.
The position of the MC36CH sensors must avoid any possibility for the operator to reach dangerous parts of the machine.
It must be difficult for operators to access to the safety switches when the guard is open, and they must be protected against
tampering or unintentional switching.
The connections of all the MC36CH sensors are listed in tables 9.9, 9.10 and 9.11; the pin-out of the connectorized
models is shown in chapter 7.
Fitting the sensor and/or the actuator directly on ferromagnetic parts (or very close to ferromagnetic parts) would lead to
a reduction of the operating distances.
It is recommended to use brass or non-magnetic fixing screws and to ft the sensor and/or the actuator on non-ferromagnetic
parts.
If fitted on ferromagnetic material, it is necessary to place a non-ferromagnetic material (min. thickness of 6 mm) between
the MC36CH/MC36CM pair and the ferromagnetic parts of the machine closest to them.
To avoid mutual interactions between different magnetic sensors, when using more than one pair of MC36CH/MC36CM
in the same application, every pair of sensor-actuator must be placed at least 50 mm away from the adjacent sensor-
actuator pair in any direction.
At the end of the installation, the machine installation procedure must be carried out to check for correct wiring and, in
particular, to check that the machine stop time is less than the operator access to the machine time, once the guard is open.
ISO 14119:2013 standard states that the magnetic type of protection devices associated to the guard cannot be easily
eluded through the use of easily available instruments or objects such as screws, nails, pieces of metal, keys and generally
through objects or tools related to the normal machine working operations. Based on the indication of the standard, a
multiple flow coded magnet, such as the MC36CM systems, is a device difficult to be eluded. Nevertheless,
due to the impossibility of guaranteeing non elusion through any substituted magnetic actuator for the coded magnetic
unit, the machine manufacturer must carry out an installation that includes mechanical obstacles which do not allow the
insertion of a substitution actuator in front of the sensor (with the guard open).
Note:
the MC36CH sensors with LED make available a signalling LED in series to the N.O. contact: this
contact is not voltage free, but it is polarized; it needs and forces a voltage drop when not operated. If the
wires are connected with the wrong polarity, the LED is permanently OFF (however the sensor still works
properly).
Attention:
• The MC36CH safety sensor and the MC36CM actuator must be installed according to the standards
in force in the country of use, when the machine is not powered and with no danger for the operator.
• Mount the sensor and the actuator on a flat surface. Excessive shocks and vibrations, over the limits
specified in the “Technical Data” section, must be avoided, otherwise proper function of the sensor
cannot be guaranteed. The contacts have to be protected from overcurrents.
• It is recommended to keep the connection cables separate from power supply loads cables of other
devices.
• Ensure that there are no conductors, cables or loose materials that can come into contact with the
sensor and/or with the actuator.
• Ensure that the conductors are not excessively tight, that their positioning avoids potential cuts or
squashing and that they are not in the way of people or things.
• Ensure that the machine can operate according to all the technical data in this manual.
• Avoid using the sensor and the actuator as mechanical backstop and avoid installation during storms.
Do not dispose of the packaging in the environment.
• Maximum current must be limited by external circuit (e.g. with a resistor in series with the sensor wires)
Summary of Contents for MC36C
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