PILZ relay

PILZ relay：
Pilz is a *** in the field of safety automation technology. Headquartered in Ostfildern (near Stuttgart),

this family-owned enterprise has established more than 40 subsidiaries and branches across all continents.

In this field, the Pilz Group, as a provider of total solutions for safety and automation technology, continues to grow.
PILZRelay(English name: relay) is an electrical control device. When the change in the input quantity (excitation quantity) meets specified requirements,
it causes a predetermined step change in the controlled quantity in the electrical output circuit. It features an interaction relationship between the control system (also known as the input circuit)
and the controlled system (also known as the output circuit). It is typically applied in automated control circuits,
functioning essentially as an "automatic switch" that uses a small current to control the operation of a large current. Therefore, it plays roles in automatic regulation, safety protection,
and circuit switching within the circuit.

PILZ relayPrecautions:

1. Impact of environment on relay reliability: The mean time between failures for relays operating under GB and SF conditions reaches 820000h, whereas in a NU environment, it is only 60000h.

2. Impact of quality grade on relay reliability: When selecting relays of A1 quality grade, the mean time between failures can reach 3660000h, while for relays of C grade, the mean time between failures is 110000, a difference of 33 times. This shows that the quality grade of the relay has a significant impact on its reliability.

3. Impact of contact configuration on relay reliability: The contact configuration of a relay also affects its reliability. The reliability of single-throw relays is higher than that of double-throw relays with the same number of poles. Meanwhile, reliability gradually decreases as the number of poles increases. The mean time between failures for a single-pole single-throw relay is 5.5 times that of a four-pole double-throw relay.

4. Impact of structural type on relay reliability: There are 24 types of relay structures, and each type affects reliability.

5. Impact of temperature on relay reliability: The operating temperature range of the relay is between -25 and 70 °C. As the temperature rises, the mean time between failures of the relay gradually decreases.

6. Impact of operating rate on relay reliability: As the operating rate of the relay increases, the mean time between failures basically shows an exponential downward trend. Therefore, if the designed circuit requires a very high operating rate for the relay, careful inspection of the relay is required during circuit maintenance to replace it in a timely manner  .

7. Impact of current ratio on relay reliability: The so-called current ratio is the ratio of the relay's operating load current to its rated load current. The current ratio has a significant impact on relay reliability. Especially when the current ratio is greater than 0.1, the mean time between failures drops rapidly, while when the current ratio is less than 0.1, the mean time between failures remains basically unchanged.
Therefore, loads with higher rated currents should be selected during circuit design to reduce the current ratio. This ensures that the reliability of the relay and the entire circuit is not reduced due to fluctuations in the operating current.

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