Zander Aachen 472222 SR4C AC/DC 24V 2un/2delayed, safety switching device

The SR4C safety relay combines immediate and time-delayed safety contacts in a compact housing. It enables the rapid and safe shutdown of hazardous machine parts during emergencies while providing controlled delay times for other circuits to return tools to their home position or safely decelerate components. The SR4C meets the highest safety standards up to PL e, SIL 3, and Category 4 according to EN ISO 13849-1 and EN IEC 62061.

Features:

• Combination of safety contacts:
- 4 safe, redundant relay contacts, configurable as:
- Immediate: 1-3 contacts
- Time-delayed: 1-3 contacts
- Adjustable delay time (1 to 30 seconds) or fixed time options available

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

• Operating modes:
- Single- or dual-channel operation available

• Start options:
- Manual start
- Automatic start

• Monitoring functions:
- Feedback circuit for monitoring downstream contactors or extension modules
- Cross-fault and ground fault monitoring
- Cyclical monitoring of output contacts

• Safety standards:
- Suitable for applications up to PL e, SIL 3, and Category 4 according to EN ISO 13849-1

• Status display:
- LED indicates the switching state


Functionality:

• Immediate shutdown:
- The immediate contacts shut down upon activation of the emergency stop button, ensuring the safe cessation of moving parts.

• Time-delayed shutdown:
- The delayed contacts activate simultaneously with the immediate contacts but remain powered for the set delay time after the emergency stop is triggered. During the delay, the supply voltage must remain connected.

• Error detection:
- Errors are detected through cyclical self-monitoring and identified during the next on/off cycle, ensuring continuous safety functionality.


Mounting and Installation:

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

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

• Spacing and cooling:
- Maintain minimum spacing from adjacent devices as per total current consideration (see technical data)
- 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 standards and regulations is required.

Included Items:

• SR4C safety relay

Applications:

• Immediate and delayed shutdown of machinery and equipment
• Control of machine components with delay times
• Protection of operators and machinery in emergency situations
• Integration into modular safety systems
• Applications requiring the highest safety standards (PL e, SIL 3, Category 4)

Type: SR4C AC/DC 24V 2un-/2verzögert