SMS-02/S1 – SAFETY MAG SENSOR 1N/O + 1 N/C

Why Choose the Carlo Gavazzi SMS-02/S1 Safety Magnetic Sensor?

The Carlo Gavazzi SMS-02/S1 is a coded safety magnetic sensor designed for non-contact monitoring of safety gates, machine guards and protective doors. It features a rectangular plastic housing, 1 normally-open (NO) + 1 normally-closed (NC) contact configuration and a nominal 20 mm operating distance for use with the corresponding Carlo Gavazzi CLS coded magnetic unit.

A key feature distinguishing the SMS-02/S1 from the standard SMS-02 is its 39 Ω, 2 W series resistor on the normally-open contact. This resistor is incorporated to help avoid contact welding detection problems in compatible safety monitoring circuits while retaining the complementary 1NO + 1NC output arrangement.

The SMS-02/S1 provides an operating distance of 20 ± 3 mm, release distance of 30 ± 5 mm and reset distance of 35 ± 5 mm. Its IP67 rectangular ABS housing, 2 m PVC cable and non-contact multiple-flux coded magnetic operating principle make it well suited to demanding industrial machine-safety installations.

Key Advantages

• Reliable non-contact safety guard monitoring for industrial machinery.
• 1NO + 1NC contact configuration provides complementary switching outputs.
• Special 39 Ω, 2 W series resistor on the NO contact distinguishes the S1 version.
• 20 ± 3 mm operating distance provides practical installation tolerance.
• Multiple-flux coded magnetic operation for use with the corresponding coded actuator.
• IP67 protection rating supports operation in demanding industrial environments.
• 2 m pre-wired PVC cable simplifies connection to the safety circuit.
• Non-contact operation reduces mechanical wear on frequently operated machine guards.

Key Features

• Carlo Gavazzi SMS Series safety magnetic sensor.
• 1 normally-open + 1 normally-closed contact.
• 39 Ω, 2 W resistor in series with the NO contact.
• 20 ± 3 mm operating distance (D-ON).
• 30 ± 5 mm release distance (D-OFF).
• 35 ± 5 mm reset distance (D-RESET).
• 100 V AC maximum switching voltage.
• 0.25 A maximum switching current.
• 5 VA maximum switching power.
• IP67 rectangular ABS housing.
• 2 m, 4-core PVC cable.
• Designed for operation with the Carlo Gavazzi CLS coded magnetic unit.

Coded Magnetic Safety Monitoring with Series-Resistor Output

The Carlo Gavazzi SMS safety system uses a sensor mounted on the fixed machine structure and a corresponding CLS coded magnetic unit mounted on the movable guard. When the coded magnetic unit enters the sensing zone, the SMS-02/S1 changes the state of its 1NO + 1NC contacts, allowing a compatible safety monitoring device to determine whether the protective guard is correctly positioned.

The S1 configuration adds a 39 Ω, 2 W resistor in series with the normally-open contact. This is the principal functional difference between the SMS-02/S1 and standard SMS-02 and is intended to help avoid problems associated with detecting welded reed contacts. The non-contact sensing principle also eliminates mechanical engagement between the sensor and actuator, reducing wear on frequently operated guards.

Typical Applications

• Hinged machine safety guards.
• Sliding protective doors.
• Removable machine guards and access panels.
• Packaging and processing machinery.
• Automated assembly equipment.
• Robotic and automated production cells.
• Conveyor and material handling machinery.
• Industrial machine-safety systems using compatible monitoring devices.