The SREC contact block is a safety extension module designed for use with a base device from the ZANDER SR series. It allows for the creation of up to three additional safety contact paths per device, enabling modular expansion of existing safety systems. With reliable fault monitoring via the base device and compatibility with safety circuits up to Category 4, PL e, and SIL 3, the SREC is an ideal choice for critical safety applications.

Features:

• Safe relay contacts:
- 3 safe, redundant relay outputs
- 1 auxiliary contact for fault monitoring

• System integration:
- Controlled via a base device from the ZANDER SR series
- Modular, flexibly configurable safety system

• Monitoring functions:
- Fault monitoring by the base device
- Ground fault monitoring

• Status display:
- LED indicates the switching state

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


Functionality:

• Activation:
- The SREC is activated via a safety contact from the base device, which supplies control voltage (DC 24V) to terminals S15 and S16.

• Safety function:
- When a safety switch is triggered, the base device interrupts the control voltage, causing the SREC safety contacts to immediately open and disconnect the circuit.

• Fault detection:
- Faults in the SREC are detected via terminals S23 and S24 and reported to the base device.

• Note:
- Independent operation of the SREC without a base device is not possible.


Mounting and Installation:

• Protection:
- Must be installed 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 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 standards and regulations is required.

Included Items:

• SREC contact block

Applications:

• Expansion of safety circuits in machinery and equipment
• Modular safety systems with the ZANDER SR series
• Applications requiring the highest safety standards (Category 4, PL e, SIL 3)