SIEMENS 3RG7825-1CB1 50041501

Siemens 3RG7825-1CB1 Safety Evaluation Unit

Description

The Siemens 3RG7825-1CB1 is a robust evaluation unit designed for safety-critical applications in industrial automation. It serves as an interface between safety sensors, such as light curtains, and the machine’s control system. Operating on a 24VDC supply, this unit provides reliable monitoring and control to ensure personnel and machine safety. This component, though obsolete, is an excellent choice for maintaining existing equipment without requiring a full system redesign.

Specifications

• Manufacturer: Siemens
• Model: 3RG7825-1CB1
• Order Number: 50041501
• Supply Voltage: 24VDC (+-15%)
• Contact Load: 4A, 230V AC
• Safety Category: Type 2 according to IEC 61496-1
• Response Time: < 20 ms
• Enclosure Rating: IP40
• Operating Temperature: -20 to +60 deg. C

Label Info

• Type: 3RG7825-1CB1
• Order No.: 50041501
• Serial No.: 70307739
• Year of Manufacture: 2007

Application

This evaluation unit is commonly used in conjunction with safety light curtains, emergency stop buttons, and other safety monitoring devices in manufacturing lines, packaging machinery, and automated assembly systems.

Country of Origin

Made in Germany.

CO2 Impact

Reusing this device saves approximately 10 kg of CO2, contributing to a more sustainable industrial environment compared to manufacturing a new one.

Availability

This is an obsolete item, available as a refurbished spare part. Limited stock available. Order now from spareparts2day for expert support and fast delivery.

FAQ

What type of safety device is the 3RG7825-1CB1 typically used with?

This evaluation unit is primarily designed for use with Type 2 safety light curtains, such as the SICK C2000 series, for which Siemens manufactured this unit as an OEM component.

Can this unit be configured for automatic or manual start?

Yes, the 3RG7825-1CB1 supports both monitored manual start (reset) and automatic start, depending on the wiring configuration of the start/restart interlock terminals.

What do the LEDs “EDM” and “OFF/ON” indicate?

The “EDM” (External Device Monitoring) LED indicates the status of the feedback loop from external contactors or relays. The “OFF/ON” LED typically indicates the output signal switching device (OSSD) status, showing whether the safety outputs are active.

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Last Update: Friday, March 13, 2026