Metz Connect 11061305 KRA-M4/1 1 NO 230 V AC coupling module content_copy

The coupling module 11061305 from Metz Connect is an electronic component type specifically designed for safe potential isolation between control logic and the connected load. It serves as a relay module in industrial control systems, where galvanic isolation between control and load circuits is required to prevent disturbances, voltage spikes, or hazardous potentials. The device is housed in a closed, compact series and features integrated protective circuitry, enhancing reliability and safety during operation. The connection terminals allow for secure and mechanically stable connections with cables in cross-sections from 0.2 mm² to 2.5 mm², both single- and multi-strand, as well as with wire end ferrules. Mounting is on TH35 support rail, with any installation orientation possible and adjacent mounting without spacing.

Applications

The coupling module is used in industrial automation systems where galvanic isolation between control and load is necessary. Typical application areas include control of motors, heaters, pumps, or other electrical consumers in machine building, manufacturing technology, or building technology. The secure isolation protects the control logic from disturbances caused by load switching operations and enables safe signal transmission across different potentials. The operating temperature range of -20 °C to +55 °C makes the device suitable for use in indoor environments and protected outdoor areas, provided no condensation occurs.

Functions and Equipment in Detail

The device features a normally open (NO) contact as output contact, made of silver-tin oxide (AgSnO₂) contact material. This material offers good electrical conductivity and high wear resistance, increasing the contact's service life. The maximum switching voltage is 250 V AC/DC, the switching current is 8 A, and the continuous current is 6 A. The switching frequency is specified at 600 operations per hour, sufficient for industrial use. The mechanical life is 2×10⁷ operations, and the electrical life is 1×10⁵ operations. A red LED serves as an indicator for the coil's operating status.

Technology Explained Simply

The operating voltage is 230 V AC with a tolerance of ±10 %, ensuring stable function in standard mains voltages. The coil current consumption is maximum 5 mA, representing a low load on the control system. The pickup time is typically 10 ms, and the drop-out time is 5 ms, ensuring fast response to control signals. The insulation between coil and contact set is basic insulation, with the nominal voltage of the power supply system being 230/400 V AC. The overvoltage category is III for the coil and II for the contact set, and the pollution degree is 2. The rated impulse voltage is 4 kV for the coil and 2.5 kV for the contact set. The enclosure protection rating is IP40, providing protection against solid objects ≥1 mm and against splashing water from any direction. The terminal protection rating is IP40, offering protection against finger contact and against vertically falling water.

Compatibility and Accessories

For use with the coupling module 11061305, the 10-pole jumper bridge 850349-02 is available. This bridge can be used to connect multiple modules or to bridge free contacts, simplifying the circuit. The label plate 820234-01-9 allows clear marking of connections, facilitating maintenance and servicing.

Mounting and Installation

Mounting is on TH35 support rail, standard in industrial electrical engineering. The installation orientation is unrestricted, allowing flexible placement in the enclosure. Adjacent mounting is possible without spacing, enabling compact arrangement of multiple modules. The screw terminals require a maximum torque of 0.5 Nm to ensure a secure connection. The minimum stripping length is 8 mm.

Operational Advantages

The coupling module provides reliable galvanic isolation, enhancing the safety and stability of control systems. The integrated protective circuitry protects against overvoltages and other disturbances. The compact design and TH35 rail mounting enable efficient space utilization in the enclosure. The high mechanical and electrical life ensures long operational life with minimal maintenance. The LED indicator simplifies diagnosis and fault detection during operation.

General
Operating voltage	230 V AC
Power consumption (max.)	5 mA
Response time (typical)	10 ms
Reset time (typical)	5 ms
Contacts	1 make contact (NO)
Switching voltage (max.)	250 V AC/DC
Inrush current	8 A
Continuous current	6 A
Switching frequency	600 Switching operations/h
Mechanical life	2x10^7 Switching operations
Electrical lifetime	1x10^5 Switching operations
Indication	red LED
Insulation coil - contact set	Basic insulation
Rated voltage power supply system	230 / 400 V AC
Over voltage category	III | II
Pollution degree	2 | 2
Rated surge voltage	4 kV | 2,5 kV
Mounting method	TH35 mounting rail
Built-in position	Any
Mounting arrangement	without spacing
Connection type	Screw terminals
Connection cross-section solid	0,2 - 2,5 mm²
Conductor cross-section stranded	0,25 - 2,5 mm²
Connection cross-section with ferrule	0,25 - 2,5 mm²
Screw torque (max.)	0,5 Nm
Stripping length (min.)	8 mm
Housing material	Polyamide 6.6 V0
Housing colour	Grey
Terminal material	Polyamide 6.6 V0
Degree of protection housing	IP40
Degree of protection for connection terminals	IP20
Operation temperature	-20 to 55 °C
Relative humidity (max.)	85 %
Storage temperature	-25 to 70 °C
Coil power loss (typical)	300 mW
Contact set power loss (typical)	500 mW

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