Dold Monitoring Relay DPDT DIN Rail Mount 230V AC 24V DC MK9055N.38/500

Dold MK9055N.38/500 Monitoring Relay features a double pole double throw (DPDT) contact configuration designed for DIN rail mounting. It operates at an input voltage of 230V AC and supply DC voltage of 24V, making it suitable for industrial electrical control and automation applications.

This relay is specifically engineered to monitor two frequency levels, such as under-speed, standstill, and over-speed situations, with separate relay outputs to manage alarm or control functions distinctly. The device includes programmable start-up time delay adjustable from 0 to 50 seconds, providing flexibility for various operational conditions.

Its input frequency monitoring range supports a large spectrum from 1 to 120,000 impulses per minute or 0.15 to 20,000 Hz, enabling detection over a wide set of frequencies. The unit also features fast reaction times at low speeds through time period measurement of inputs, further enhancing monitoring reliability.

Additional features include LED indicators for auxiliary voltage, measuring input condition, and output relay status, as well as an optional LED to indicate wire or sensor failures for NAMUR-type sensor inputs. The relay has a screw terminal connection ensuring secure wiring and is rated with IP20 and IP40 ingress protection suitable for typical industrial environments.

The MK9055N.38/500 series offers compact dimensions (97 mm length, 90 mm height, 22.5 mm width) to fit efficiently in control panels. It supports a contact current rating of 3A and operates between -20°C to 60°C ambient temperature. This product complies with CE and RoHS directives and is manufactured in Germany, assuring high quality and reliability.

Equipped with double pole double throw (DPDT) relay contacts to provide flexible switching options. Mounts easily on standard DIN rails for seamless integration in electrical enclosures. Programmable time delay up to 50 seconds enhances control over frequency monitoring response.

Designed to monitor under-speed and over-speed frequency conditions separately with adjustable response values. LED indicators provide clear and immediate operational status and fault detection. Robust operating temperature range supports demanding industrial environments.

Compact size allows space-efficient installation in control panels and relay racks. Manufactured under strict quality standards in Germany ensuring durability and performance.

This monitoring relay is ideal for industrial automation, electrical distribution, and machinery protection systems requiring precise frequency monitoring and reliable switching. It fits well within electrical panels, automation setups, and frequency control applications where dual frequency level detection is critical.

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