The SREC contact block is a safety extension module designed to work with a base device from the ZANDER SR series to provide additional safety contact paths. It allows for the expansion of existing systems with up to three safe, redundant relay outputs per module. The device features comprehensive fault monitoring via the base device and meets the highest safety requirements up to Category 4, PL e, and SIL 3. Independent operation of the SREC is not possible; it serves solely as an extension to a base device.

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 standards:
- Suitable for applications up to Category 4, PL e in accordance with EN ISO 13849-1 and SIL 3


Functionality:

• System activation:
- The SREC is controlled via a safety contact from the base device, which supplies control voltage (DC 24V) to terminals S15 and S16.
- Starting the base device also activates the SREC.

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

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


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:

• Independent operation of the SREC without a base device is not possible.
• Installation and commissioning must only be performed by qualified personnel.
• Adherence to all relevant standards and regulations is required.

Included Items:

• SREC safety extension module

Applications:

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