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Siemens 3RG7121-3AA00 Magnetic Proximity Sensor

Siemens 3RG7121-3AA00 3-wire PNP magnetic proximity sensor.

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ManufacturerSiemens

Part number3RG7121-3AA00

Type Magnetic Proximity Sensor

Output 3-wire PNP NO

Voltage 20-250V AC/DC

Max Switching Voltage 250V

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Magnetic detection Wide AC/DC voltage range PNP NO output 3-wire configuration Non-contact sensing High voltage capability

Product description

The Siemens 3RG7121-3AA00 is a magnetic proximity sensor designed for detecting magnetic actuators or targets. This 3-wire sensor features a PNP output and operates as Normally Open (NO). A key characteristic is its wide operating voltage range of 20-250V AC/DC, making it highly versatile for various power systems. The maximum switching voltage is 250V.

This type of sensor is commonly used in applications where a non-contact detection method is required, such as in door or gate position sensing, linear actuator position feedback, and safety interlocks. Industries like material handling, security systems, and general industrial automation benefit from its flexibility.

Stanlo Automation, a veteran-owned surplus parts distributor, offers the Siemens 3RG7121-3AA00 to meet your specialized sensing needs. We provide reliable components to keep your automation systems functioning effectively.

Technical specifications

Type	Magnetic Proximity Sensor
Output	3-wire PNP NO
Voltage	20-250V AC/DC
Max Switching Voltage	250V
Detection	Magnetic actuator

Common applications

Door/gate position sensing

Actuator position feedback

Safety interlocks

Material handling

Security systems

Industrial automation

Compatible systems

PLCs with PNP inputs AC/DC control systems Automation panels

Also known as

Siemens 3RG7121

Replaces / compatible with

This magnetic proximity sensor can replace other 3-wire PNP NO sensors that operate within a wide AC/DC voltage range, particularly where magnetic target detection is required.

Technical note

Expert tip

Proper alignment with the magnetic actuator is crucial for reliable detection with the 3RG7121-3AA00, especially given its non-contact nature.

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Frequently asked questions

What is the voltage range for the Siemens 3RG7121-3AA00 magnetic sensor?

The Siemens 3RG7121-3AA00 magnetic proximity sensor offers a broad operating voltage range of 20-250V AC/DC. This allows for flexible integration into systems with varying power supply types and voltages.