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FD 551-K21 Pizzato Position switch with roller lever
Pizzato FD551-K21 position limit switch with roller lever actuator, 1 NO + 1 NC snap-action contacts and metal housing, supplied with cable gland for industrial automation applications.
£17.65
Why Choose the Pizzato FD551-K21 Position Limit Switch?
The Pizzato FD551-K21 is a robust position limit switch with roller lever actuator, designed for precise detection and reliable operation in industrial automation systems. As part of the heavy-duty Pizzato FD series, it delivers consistent switching performance, high durability and long service life in demanding environments.
Built with a rugged metal housing and a technopolymer roller lever actuator, the FD551-K21 is engineered to withstand vibration, dust and temperature fluctuations typical of industrial applications. Its compact rotating head enables flexible mounting and accurate positioning within machinery.
This model features a 1 NO + 1 NC snap-action contact configuration with positive opening, making it suitable for both control and safety applications. The K21 variant includes a pre-assembled cable gland for 6–12 mm cable diameters, simplifying installation and improving sealing performance.
Key Advantages
- Heavy-duty position limit switch for industrial machinery.
- 1 NO + 1 NC contacts for control and safety functions.
- Positive opening NC contact for enhanced safety reliability.
- Pre-fitted cable gland (K21) for faster installation.
- Durable metal housing for harsh environments.
- IP67 protection rating for dust and water resistance.
Key Features
- Pizzato FD series position switch.
- 1 NO + 1 NC snap-action contacts.
- Positive opening safety function.
- Technopolymer roller lever actuator (Ø20 mm).
- Metal enclosure for industrial durability.
- PG13.5 conduit entry with assembled cable gland.
- Optimised for quick wiring and secure sealing.
- Suitable for industrial automation systems.
Reliable Position Detection for Industrial Automation
The Pizzato FD551-K21 is designed for accurate position detection of moving machine components. Its roller lever actuator ensures smooth engagement and reduced wear, while snap-action contacts provide fast and repeatable switching performance.
The integrated cable gland simplifies installation and enhances sealing, making this variant particularly suitable for environments where reliability and rapid commissioning are essential.
Typical Applications
- Industrial machinery and automation systems.
- End-of-travel and position detection.
- Safety guards and interlocking systems.
- Conveyor and material handling equipment.
- Packaging and production machinery.
- General industrial limit switching.
Technical Specifications
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| Device Type | Limit switch | |
|---|---|---|
| Switching Action | Snap action | |
| IP Rating | IP67 | |
| Contacts | 1NO + 1NC | |
| Actuator Type | Roller lever | |
| Housing Material | Metal | |
| Connection | PG13.5 cable entry | |
| Series | FD Series | |
| Product type | Position limit switch | |
| Contact configuration | 1 NO + 1 NC | |
| Contact type | Snap-action, positive opening | |
| Actuator type | Roller lever (technopolymer, Ø20 mm) | |
| Housing material | Metal | |
| Connection type | Cable entry (PG13.5 with gland) | |
| Cable diameter | approx. 6–12 mm | |
| Protection rating | IP67 | |
| Operating temperature | approx. -25 °C to +80 °C | |
| Mechanical life | up to 20 million operations | |
| Mounting type | Surface / machine mounting | |
| HS Code | 85369095 |
Frequently Asked Questions
What is the Pizzato FD551-K21 used for?
It is used to detect the position of moving parts and provide control signals in industrial machinery and automation systems.
What contact configuration does it have?
The FD551-K21 features 1 normally open (NO) and 1 normally closed (NC) contact.
What makes the K21 version different?
The K21 version includes a pre-assembled cable gland for 6–12 mm cables, simplifying installation and improving sealing.
Does it support safety applications?
Yes, the NC contact includes positive opening, making it suitable for safety circuits.
Is it suitable for harsh environments?
Yes, the metal housing and IP67 protection rating ensure reliable performance in demanding industrial conditions.
Trusted by Industrial Engineers Worldwide
Pizzato FD series limit switches are widely trusted for their rugged construction, precise switching and dependable performance across industrial automation systems.
