The SR3C safety relay is a universally applicable device designed for the reliable shutdown of machinery and equipment in hazardous situations. Featuring three safe relay contacts and an additional auxiliary contact (status contact), it meets the highest safety standards according to EN ISO 13849-1, EN IEC 62061, IEC 61508, and IEC 61511. The device supports single- or dual-channel operation and is ideal for emergency stop circuits and guard monitoring. With integrated self-monitoring and an LED status indicator, the SR3C ensures maximum safety and user convenience.

Features:

• Safe relay contacts:
- 3 redundant, safe relay contacts for safety applications
- 1 auxiliary contact (status contact) for status monitoring

• Versatile connections:
- Emergency stop buttons
- Safety switches
- Non-contact safety switches
- Safety devices with OSSD outputs

• Flexible operating modes:
- Single- or dual-channel operation available

• Monitoring functions:
- Feedback circuit for monitoring downstream contactors or expansion modules
- Cyclical monitoring of output contacts for fault detection

• Status display:
- LED indicates the switching state

• Safety standard:
- Stop function up to PL e / SIL 3 according to EN ISO 13849-1 / IEC 61508


Functionality:

• Normal operation:
- When the emergency stop circuit is closed (e.g., safety door is closed), the SR3C allows the machine to operate.

• Safety activation:
- If the emergency stop circuit is opened (e.g., safety door is opened), the device immediately interrupts the release current paths, safely shutting down the machine.

• Error detection:
- Force-guided relays and cyclical self-monitoring ensure faults are detected early, maintaining the reliability of the safety function.


Mounting and Installation:

• Protection:
- Suitable for installation in control cabinets with at least IP54 protection according to EN 60204-1

• Mounting:
- Mounts on a 35 mm DIN rail according to EN 60715 TH35

• Spacing and cooling:
- Maintain at least 10 mm distance from adjacent devices for AC 115 V / 230 V variants
- Ensure adequate heat dissipation within the control cabinet
- Optional spacer (Part No. 472596 by ZANDER AACHEN) available


Safety Instructions:

• Installation and commissioning must only be performed by qualified personnel.
• Adherence to all relevant safety standards and regulations is required.

Included Items:

• SR3C safety relay

Applications:

• Emergency stop circuits for machinery and equipment
• Guard monitoring
• Control of safety-relevant components
• Applications requiring the highest safety standards (PL e / SIL 3)