The Schmersal PROTECT SRB 101EXi 1A is a dual-channel intrinsically safe safety relay designed for emergency stop and guard door monitoring applications in hazardous areas. Engineered for ATEX 2GD environments, this 24 V DC module delivers high-level safety performance—including cross short and fault detection—while offering flexible reset options and minimal power consumption.

Why Choose the SRB 101EXi 1A Safety Relay?

Opting for the SRB 101EXi 1A means choosing a relay that seamlessly blends certified explosion protection with cutting-edge safety control. It’s ideal for critical environments such as oil & gas, food processing, or manufacturing under regulatory constraints. With SIL 3 / PL e performance, internal diagnostics, and ATEX approval, this relay ensures maximum reliability, reduced downtime, and compliance with international safety standards.

Product Standout Features:

• Dual channel emergency stop or guard door monitoring, supporting 1NO safety contact and 1 auxiliary contact
• Intrinsically safe input circuits with cross short detection for Ex Zone 1/2, gas and dust environments
• Certified to SIL 3 (IEC 61508), Category 4 / PL e (ISO 13849 1) for superior functional safety
• Automatic and manual reset options with feedback loop circuitry for flexible safety control
• Energy efficient operation—only about 57 mA current draw at 24 V DC
• Robust construction: IP40 housing (IP54 in enclosure), durable up to 10 million switching cycles, and compact DIN-rail form factor
• Five diagnostic LEDs for real time status monitoring of power, enabling path, and channel performance.