Solenoid Locking Metal Safety Switches with RFID
Main Features
- Actuation without contact, using RFID technology
- Digitally coded actuator
- Actuator holding force 7500 N
- SIL 3 and PL e with a single device
- Metal housing, three conduit entries M20
- Protection degrees IP67 and IP69K
- Versions with key release and emergency release button
- PL e also in series of up to 32 devices
- Signalling LED
Description
These switches are used on machines where the hazardous conditions remain for a while, even after the machines have been switched off, for example because of mechanical inertia of pulleys, saw disks, parts under pressure or with high temperatures. They can also be used when it is necessary to control machine guards allowing the opening of protections only under specific conditions. The mode 1 (active safety outputs with closed and locked guard) versions are considered interlocks with locking in accordance with ISO 14119, and the product is marked on the side with the symbol shown.
RFID actuators with high coding level
The NG series features an electronic system based on RFID technology to detect the actuator. This system gives a different coding to each actuator and makes it impossible to tamper with a device by using another actuator belonging to the same series. The actuators may have millions of different coding combinations and are therefore classified as actuators with a high coding level according to ISO 14119.
Holding force of the locked actuator
The sturdy interlocking system guarantees the actuator a maximum holding force FZh of 7500 N which corresponds to a breaking force F1max of 9750 N. This is one of the highest values available on the market today making this device suitable for severe heavy-duty applications.
Dustproof
The switch is provided with a through hole for inserting the actuator and, thanks to this peculiarity, any dust which may go inside the actuator hole can always come out of the opposite side instead of being left there. Moreover, the lock pin is provided with an external diaphragm gasket which makes it suitable for any environment where dust is present.
High protection degree
These devices are designed to be used in the toughest environmental conditions and they pass the IP67 immersion test acc. to IEC 60529. They can therefore be used in all environments where the maximum protection of the housing is required. Special measures also allow devices to be used even in machines which are subjected to washing with high pressure warm water jets. In fact these devices pass the IP69K test according to ISO 20653, using jets of water to 100 atmospheres at a temperature of 80°C.
Centering
The switch is provided with a wide centering inlet for the actuator pin. Such solution makes it easier to
align the actuator with the hole found in the head during the fitting stage. Moreover, this solution drastically reduces any probable collisions between the actuator and the switch, also allowing it to be fitted on inaccurate doors.
Push-in spring connections
The switch is provided with a PUSH-IN type spring connection system on the inside. This technology allows a very handy quick wiring procedure since the wire just needs to be inserted into the appropriate hole in order to be secured and to establish the electrical connection. The said operation can be carried out without the help of any tool but simply using rigid or flexible wires with wireend sleeves. Release is obtained by pressing the appropriate wire-releasing button.
Six LEDs for immediate diagnosis
As the LEDs have been designed for quick immediate diagnosis, the status of each input and output is highlighted by one specific LED. This makes it possible to quickly identify the interruption points in the safe chain, which device is released, which door is opened and any errors inside the device. All that in a straightforward way without needing to decode complex blinking sequences.
Holding force of the unlocked actuator
The inside of each switch features a device which holds the actuator in its closed position. Ideal for all those applications where several doors are unlocked simultaneously, but only one is actually opened. The device keeps all the unlocked doors in their position with a retaining force of 30 N~, stopping any vibrations or gusts of wind from opening them.
Laser engraving
All the NG series switches are indelibly marked with a dedicated laser system that allows the marking to be also suitable for extreme environments. This system that does not use labels, prevents the loss of plate data and the marking is more resistant over time.
Orientable heads and devices
The head can be quickly oriented in four different directions after unscrewing the 4 fixing screws. Also the key release device and the emergency release button can be positioned in 90° steps, thus obtaining as many as 16 different configurations with the same article.
Articulated joint for inaccurate doors
All the NG series actuators are jointed and allow the pin to match the centering hole of the switch. This way there is no need for precise actuator-switch aligning operations during the fitting stage. Moreover, thanks to its flexibility, this device can be used on doors with an activating range up to 150 mm, without having to tilt the pin beforehand.
Key release device and emergency release button
The auxiliary lock release device is used to permit unlocking of the actuator only by personnel in possession of the key. It also works with no power supply and once actuated, prevents the guard from locking.
The emergency release button allows actuator release and immediate opening of the door. Generally used in machines within which an operator could inadvertently become trapped, it faces towards the machine interior, to allows the operator to exit even in the event of a black out. Equipped with bistable function, it can be freely extended with suitable extensions. Both these devices can be positioned on the four switch sides, thus allowing its installation both to the interior and to the exterior of the machine.