What is SIL3/PLe and SIL2/PLd

The DS range of speed and standstill monitors are all SIL3/PLe and SIL2/PLd certified.

The abbreviation SIL (Safety Integrity Level) comes from the field of functional safety and is used in the international standard IEC 61508. The specific standard of safety-relevant electrical control systems is defined in the IEC or EN 62061.

The reliability of safety functions of electrical systems is classified into four different safety integrity levels. These classifications are SIL1 to SIL4. SIL1 is the lowest reliability classification, and SIL4 is the highest. The DS range of safety speed monitors can achieve a SIL3 safety integrity level.

PL (Performance Level) is used similarly to the safety integrity level when classifying safety classes. The performance level falls under the standard ISO 13849. This classification takes place from PLa to PLe. PLa has the lowest risk reduction, and PLe has the highest. The DS range of safety relays is certified up to PLe.

The picture below depicts the risk analysis, which assists in the calculation of the performance level. The first analysis step, S determines the severity of the injuries that can be sustained due to an accident. The analysis F deals with the frequency of a possible accident or the duration of the user’s stay under the risk. There is also a section regarding the possibility of avoiding the threat and the limitation of the damage that might occur. Consequently, high-risk applications require components with the highest performance level PLe, such as the DS Range of speed monitors.

The table in the picture compares the performance level to the corresponding safety integrity level. As a result, the combinations SIL3/PLe and SIL2/PLd can be derived.

What is sil3/PLe and SIL2/PLd

Professional wood-splitting using a radio remote – Forestry

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A trend that we as exhibitors saw at the last ‘Agritechnica’ trade fair in Hanover is the rediscovery of wood for heating and generating electricity. Wood is gaining a lot of popularity as a renewable energy source and its financial advantages.

Log-splitter

Special forestry machines are used both for the preservation and the processing of the wood. An example of such a machine is a log splitter, which helps cut the tree trunks into small pieces.

Forestry machines are remotely controlled

Splitters are hydraulically driven. They split logs in a vertical or horizontal position. A thick tree trunk is very heavy, and therefore, to simplify the transportation of those thick trunks to the splitter, a compact winch is mostly mounted on the machine.

Fornax Basic Safe remote control

The manufacturer of log splitters uses the Tyro Fornax Basic / Aquarius remote control for this application.

Radio remote attached to a belt

During the dragging of the tree trunks, it is important to position them correctly on the splitter. By means of a belt-clip, the operator can attach the remote to his belt. This makes it easier for him to use the remote control when required to adjust the position of the tree trunk. He can now operate the winch to pull the tree trunk and position it as desired without going back and forth to the splitting machine. Thus, having a Tyro remote is a definite plus in terms of comfort and convenience, with a positive effect on productivity.

Wirelessly Controlled Irrigation/Spray System

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wireless remote control for irregation

A sprinkler system generally consists of a powerful pump – for example, the pump that pumps out the water from a ditch. When the computer indicates that the spray gun has finished with its program, the pump is expected to stop immediately.

This is done with the help of an Aquarius transmitter and an Aquarius receiver.

Aquarius M2M system

The Aquarius is programmed as a transmitter that receives a signal from the spray gun and sends it to the pump (at a distance of 700 meters!) which then directly shuts down. All this without human intervention, without the touch of a button.

This solution comes from the demand for a stable communication signal that the user can always trust. Tyro Remotes offers this guarantee with the M2M control systems based on the latest radiographic technology.

Machine-to-machine

The term ‘M2M’ or ‘Machine to Machine’ stands for the communication between machines without any human intervention.

Bale Wrapper Remotely Controlled

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radio remote control for bale wrapper

Wrapping grass into bales is a commonly used method to preserve it from nutrient loss. The bales are compressed with a round or square baler. A bale wrapper wraps a tight layer of plastic foil around the bale to turn it into silage.

Baling is a relatively new technique, introduced just over a decade ago. This means there are still major opportunities to increase its value to the farmer. Wireless control of the bale wrapping machinery has made the process a ‘one-man job. ’

Wrapping of the hay bales

The baler lets the compressed bale lie untouched on the land. Then the bale loader picks up the bale and puts it on the wrapping table of the bale wrapper. The driver of the loader activates the wrapping process using a wireless remote control from its cabin. When the bale is wrapped, it is dropped on the ground with the help of a remote control. Afterward, the next bale can be loaded on the wrapping table, and the above-mentioned cycle of wrapping and dropping the bale on the ground repeats itself.

Work more efficiently with a wireless radio remote

Before, without the wireless radio remote, the driver needed to get off the loader and had to step in the tractor that drives the wrapper to manage the functions of the wrapper, such as loading a new bale, wrapping, and then dropping it on the ground. Getting in and out of the tractor again and again was very inefficient for the driver.

Waterproof Aquarius receiver

The system that has been used in this project is called Pyxis/Aquarius. This system is very suitable for such applications. The fine particles released mainly from the straw harvest can not penetrate the Aquarius receiver casing.

Limited range

Also, to make the bale wrapping process as safe as possible, the remote has an out-of-range signal with a limited radius. When the loader is more than 75m away from the wrapping machine, the machine stops immediately. This is done to avoid running of the machine without any supervision.