Overvoltage protection module, 103 | Siemens EN 50295 specs

AS-Interface Slaves

Modules with special functions

Overvoltage protection module

■Overview

The AS-Interface overvoltage protection module protects down- stream AS-Interface devices or individual sections of the instal- lation in AS-Interface networks from conducted overvoltage caused by switching procedures and distant lightning strikes.

The installation site of the overvoltage protection module repre- sents the transition from Zone 1 to 2/3 within the lightning protec- tion zone concept. Direct lightning strikes must be overcome by means of additional protective measures at the transitions from lightning protection Zone 0A to 1.

The AS-Interface overvoltage protection module enables the AS- Interface to be integrated into the overall overvoltage protection concept of a plant or machine.

The module has the same design, connection and degree of protection (IP67) as the previous AS-Interface application mod- ules. It is a passive module without an AS-i IC and therefore does not require its own address on the AS-Interface network.

It is connected to an AS-Interface system via the FK-E or PG-E coupling module. The EEMS interface can be used to protect the AS-Interface cable and the auxiliary voltage cable against over- voltage.

Overvoltages are diverted via a ground cable with a yel- low/green oil-proof outer casing. This cable is permanently inte- grated into the module and must be connected to system earth with a low resistance connection.

Installation guidelines

Nominal discharge current isn

The nominal discharge current is the peak value of a peak cur- rent with an 8/20 microsecond waveform for which the overvolt- age protection module is rated in accordance with a specific test program.

With the 8/20 waveform, 100% of the value is reached after

8 microseconds and 50% of the value is reached after 20 micro- seconds.

Protection level Up

The protection level of an overvoltage protection module is the highest instantaneous voltage value at the terminals which is determined from individual tests.

The protection level characterizes the capability of an overvolt- age protection module to limit overvoltages to a residual level

Accessories

An FK-E or PG-E coupling module is required to connect the AS-Interface cable and the auxiliary voltage supply cable.

OVP

Application

AS-

Inter- face

Device with earth connection

AS-

Inter- face

Application

NSA0_00093

Device without earth connection

→Earthing of the mounting plate Mounting plate

OVP = Overvoltage protection

Earthing of the protective modules and of the devices to be protected must be carried out via a common grounding point (equipotential bonding). If devices with total insulation are to be

Application example

protected, their mounting brackets must also be connected into the grounding points.

Zone1			Zone2

	AS-	AS-	AS-	AS-
OVP	Inter-	Inter-	Inter-	Inter-
	face	face	face	face
	face	face	face	face

protectedrange

Equipotentialbonding NSA0_00092

Zone1

OVP

Protectionapprox.0.5mtotheleft

(systemearth)

Protectionapprox.5mtotheright OVP=Overvoltageprotection

Siemens IK PI · 2004

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EN 50295 specifications

Siemens EN 50295 is emerging as a pivotal standard in the domain of electrical safety and design, particularly relevant for the electrical industry and equipment manufacturing sectors. Primarily, this European Norm is geared towards ensuring the safety of electrical systems used in dry environments, which is essential for various industrial applications.

One of the main features of the EN 50295 standard is its comprehensive safety requirements which are aimed at mitigating the risks associated with electrical systems. This includes aspects like insulation resistance, protective earthing, and the management of electrical faults. By setting a benchmark for safety, Siemens EN 50295 assists manufacturers in maintaining compliance with national and international regulations, thus protecting both users and equipment.

The standard emphasizes the importance of safety measures in the design process. It outlines criteria for components, assembly methods, and system installation, ensuring that electrical equipment operates stably and gets rid of risks related to electrical failures. This involves rigorous testing of materials and components, which enhances their reliability and longevity while providing efficient overall operation.

Siemens EN 50295 also incorporates advancements in technology, acknowledging the significance of intellectual innovation in the industry. It encourages the integration of smart technologies and automation features into electrical systems, paving the way for enhanced operational efficiencies. Such technologies not only improve the performance of electric systems but also contribute to energy conservation, reducing the overall environmental footprint.

Another characteristic of the EN 50295 standard is its adaptability. The framework it provides can be customized depending on specific industry needs, making it versatile across various sectors such as manufacturing, construction, and transportation. This adaptability ensures that businesses can maintain high safety standards while still allowing room for innovation and modern practices.

In summary, Siemens EN 50295 presents a well-rounded approach to enhancing safety, reliability, and sustainability in electrical systems. Its features and characteristics are set to guide industries in making informed decisions regarding electrical configuration, ultimately fostering a safer and more efficient working environment. The incorporation of emerging technologies ensures that the standard remains relevant in a fast-evolving technological landscape, proving to be an invaluable asset for manufacturers and service providers alike.

Siemens EN 50295 Overvoltage protection module, 103, Protection level Up, Application example

Models: EN 50295