Schmersal Protect-PE-02 4-Channel Safety Input Expansion Module

Description

Schmersal Protect-PE-02 4-Channel Safety Input Expansion Module

Product Dimensions：

The Schmersal Protect-PE-02 is an industrial safety input expander module designed to simplify the connection of multiple safety sensors to a single safety monitoring unit. It allows for the cost-effective expansion of safety systems without sacrificing diagnostic depth or safety integrity.

Product Detailed Description

The Protect-PE-02 serves as an interface between field safety devices and a central safety relay or controller. Its primary purpose is to consolidate signals from up to 4 safety sensors (such as emergency stop buttons, magnetic switches, or interlocking devices) into a single safety loop while maintaining individual channel diagnostics.

Technical Parameters

Product Advantages

• Input Expansion: Reduces the number of safety relays needed by allowing four dual-channel sensors to be monitored by one module.
• Granular Diagnostics: Unlike simple “series wiring” (daisy-chaining), this module provides individual signaling outputs (Y1 through Y4) for each connected sensor, making it easy to identify exactly which door or E-stop is open.
• Versatile Connectivity: Compatible with a wide range of devices, including Schmersal’s electronic CSS sensors and Active Opto-electronic Protective Devices (AOPDs/Light Curtains).
• Self-Monitoring: Includes integrated logic for wire-breakage detection and earth-fault monitoring to ensure the system remains fail-safe.
• Automatic Reset: Features an automatic reset function that simplifies system restart logic after a safety demand is cleared.

Important Considerations (Precautions)

• Safety Rating: Note that this module is rated for PL d / SIL 2. If your application risk assessment requires PL e / SIL 3, this expander must be used in a specific redundant architecture or replaced with a higher-rated component.
• Current Limits: Ensure the total current draw of all four connected sensors does not exceed the internal electronic fuse rating of the module.
• Terminal Wiring: Ensure correct polarity for the 24V supply. The “SK” version uses screw terminals, while the standard version uses cage clamps; ensure the wire ferrules are properly crimped for a secure connection.
• Series Connection: Do not connect multiple Protect-PE-02 modules in series without verifying that the cumulative response time meets your machine’s safety distance requirements.

Product Applications

• Multi-Door Guarding: Monitoring multiple safety interlocks on a large machine or production line where individual status tracking is required.
• E-Stop Chains: Consolidating multiple emergency stop buttons located at different stations around a conveyor system.
• Mixed Safety Loops: Combining different types of sensors (e.g., one light curtain, two magnetic switches, and one mechanical interlock) into a unified safety circuit.
• Control Cabinet Optimization: Reducing the physical space required in the electrical panel by minimizing the number of primary safety relays.

Payment: Bank of Chicago, Bank of Singapore

Express cooperation: fedex, DHL, UPS and your express account

Service: Professional Sales provides 24 hours /7 days online service

Please make an inquiry for more models：