SR BD41AN4 Pizzato Safety magnetic sensor

Why Choose the Pizzato SR BD41AN4 Safety Magnetic Sensor?

The Pizzato SR BD41AN4 is a robust coded magnetic safety sensor designed for reliable non-contact monitoring of guards, doors and protective access points on industrial machinery. Part of the Pizzato SR-B coded magnetic safety sensor series, it combines coded magnetic actuation with reed-contact switching for dependable machine safety applications.

The SR BD41AN4 features a 2NC + 1NO contact configuration with the guard closed, providing two normally closed contacts together with an additional normally open contact. Its non-contact operating principle allows machine guards to be monitored without mechanical actuation of the sensor, helping reduce wear in applications with frequently opened doors and covers.

This version is supplied without an actuator and features an integrated 4 m cable. The sensor uses a durable technopolymer housing with metal fixing plates and provides IP67 / IP69K protection. Compatible coded actuators include the SM B01F and SM B02F, allowing the sensing arrangement to be selected according to the required operating distance.

Key Advantages

• Reliable coded magnetic safety sensor for machine guard monitoring.
• 2NC + 1NO contact configuration with the machine guard closed.
• Non-contact magnetic operation helps minimise mechanical wear.
• Integrated 4 m cable supports flexible machine installation.
• Durable technopolymer housing with metal fixing plates.
• IP67 / IP69K protection for demanding industrial environments.
• Compatible with coded actuator options providing 5 mm or 8 mm actuation distances.
• Suitable for safety functions up to PL e / SIL 3 when correctly integrated into an appropriate safety architecture.

Key Features

• Pizzato SR-B coded magnetic safety sensor series.
• 2NC + 1NO contacts with the guard closed.
• Reed-contact switching technology.
• Coded magnetic non-contact actuation.
• Integrated 4 m cable.
• Technopolymer housing with metal fixing plates.
• IP67 according to EN 60529.
• IP69K according to ISO 20653.
• No integrated status indicator.
• Compatible with SM B01F and SM B02F coded magnetic actuators.
• Actuator supplied separately for installation flexibility.
• Designed for safety-related monitoring of guards, doors and protective covers.

Reliable Coded Magnetic Guard Monitoring for Industrial Machinery

Coded magnetic safety sensors such as the Pizzato SR BD41AN4 monitor movable machine guards without requiring direct mechanical contact. The sensor is mounted to the fixed machine structure and a compatible coded actuator is installed on the movable guard. When the correct actuator enters the sensor's operating range, the coded magnetic field operates the reed contacts so the connected safety system can monitor the position of the guard.

The 2NC + 1NO contact arrangement provides two normally closed contacts together with an additional normally open contact, offering flexibility for safety monitoring and auxiliary signalling. When correctly combined with an appropriate safety module and system architecture, the SR-B coded magnetic sensor system can support safety functions up to SIL 3 and PL e.

Typical Applications

• Industrial machine guard monitoring.
• Safety doors and protective access panels.
• Packaging and production machinery.
• Conveyors and material handling systems.
• Automated manufacturing cells.
• Machine tools and processing equipment.
• OEM machinery and industrial safety systems.