Schmersal Safety Relay Module SRB 301LC/B-24V

Description

The SRB 301LC/B-24V from Schmersal is a safety monitoring module designed for applications such as emergency stops and safety gate monitoring. This component ensures the safe operation of machinery by reliably processing signals from safety devices. It features a compact design suitable for DIN rail mounting and provides clear diagnostic information via front-panel LEDs.

Specifications

• Manufacturer: Schmersal
• Type: SRB 301LC/B-24V
• Part Number: 101163456
• Operating Voltage: 24V AC/DC
• Safety Contacts: 3 Normally Open (NO)
• Auxiliary Contacts: 1 Normally Closed (NC)
• Enclosure Protection: IP40
• Terminal Protection: IP20
• Mounting: DIN Rail

Label Info

• Rated Current Consumption: max. 120mA
• DC13: 24V / 6A
• AC15: 230V / 6A
• Certifications: CE, UL Listed (382E), CCC

Application

This safety relay is ideal for use in machine safety circuits, including the monitoring of E-stop buttons, interlocking devices on movable guards, and as an output expansion for safety light curtains. Its robust design makes it suitable for a wide range of industrial environments.

Country of Origin

Made in Germany.

CO2 Impact

By purchasing this reused part, you contribute to a circular economy and avoid approximately 8.0 kg of CO2 emissions associated with the production of a new component. This is a significant step towards more sustainable industrial operations.

Availability

This item is an obsolete product but is available from our stock. Order now from PLC2Day for expert support and fast delivery.

FAQ

Question?
What is the primary application for the SRB 301LC/B-24V?
Answer:

Its primary application is the monitoring of safety components like emergency-stop buttons and safety gates in industrial machinery, ensuring that the machine enters a safe state when a safety device is activated.

Question?
Can this module be used with both single-channel and dual-channel safety circuits?
Answer:

Yes, the SRB 301LC/B-24V is designed to monitor both single and dual-channel safety circuits, offering flexibility for various safety system architectures.

Question?
What do the K1 and K2 LEDs indicate on the front panel?
Answer:

The K1 and K2 LEDs indicate the status of the internal safety relays. When lit, they confirm that the respective safety channel is closed and the system is in a safe, operational state. This provides immediate visual feedback for diagnostics and troubleshooting.

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Last Update: Friday, March 13, 2026