Safety Relay: verschil tussen versies
(→Small machines) |
(→Small machines) |
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| Regel 17: | Regel 17: | ||
[[Bestand:Wiring-4-5-pin.jpg|400px|Magnetic on-off switch]] | [[Bestand:Wiring-4-5-pin.jpg|400px|Magnetic on-off switch]] | ||
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| + | where there is often a [[https://en.wikipedia.org/wiki/Electrical_contact Normally Closed]] [[https://nl.wikipedia.org/wiki/Clixon Clixon temperate sensor]] in the motor that also switches the machine off (e.g just like the emergency stop button). | ||
Versie van 16 okt 2023 om 23:50
We use safety relays/magnetic on-off relays in many places; these prevent that a machine powers back on after a power loss.
It also prevents powering back on after someone pressed the emergency button.
And it ensures the power is turned off immediately after pressing the emergency button, the stop button, an overheat/overload situation or a lock-out situation. In some cases it is also integrated in the [Access control system].
3 phase power machines
Most are a variation of the Large Stationary Grinder, Metal Mitre Saw or the Cirkelzaagtafel SCM L'Invincible / Large tablesaw circuit. These are based on a product such as: https://www.hydrauliek24.nl/motor-beveiligingsschakelaar-7-10-a or on normal contractors with a load limiter (see yellow crate for more of these).
Small machines
Some of the small machines use a 4 or 5 pin `on-off' button such as https://www.amazon.de/-/en/Hefddehy-Waterproof-Magnetic-Button-220-240V/dp/B0BYNGHLJ5/ref=sr_1_10 or https://www.amazon.de/-/en/KEDU-KJD17-Flush-Mounted-Switch-Voltage/dp/B07956F8TN/ref=d_pd_day0_sccl_2_1/257-4034223-4086038
These are wired as thus:
where there is often a [Normally Closed] [Clixon temperate sensor] in the motor that also switches the machine off (e.g just like the emergency stop button).
