Switching amplifiers with relay output from pi safety for hazardous areas and industrial applications

  • Easy to integrate into existing control systems
  • Reliable, robust, and low-maintenance in continuous operation
  • Plug-and-play – time-saving, simple, and safe
Schaltverstaerker-EX-SW-header

Reliable switching technology for hazardous areas and industrial plants

The switching amplifiers with relay output from pi safety are designed for use in demanding industrial environments and potentially explosive areas. They offer reliable signal processing and transmission, are ATEX and IECEx certified, and can be easily integrated into existing systems. With their robust design and high compatibility, they are the ideal solution for a wide range of applications.

Switching amplifiers with relay output
for applications in hazardous areas (Ex zones)

SW.Ex Switching relais, explosion protected

Product specifications

Specification:

  • II2(1)G Ex eb mb ib [ia Ga] IIC T4 Gb
    II2(1)D Ex tb ib [ia Da] IIIC T130°C Db
  • Universal Transducer for mounting in zone 1 / 2 / 21 / 22
  • Two adjustable, potential free relay outputs
  • Ambient temperature -40…+70°C
  • IP66
  • Temperature class T4 for all gases and dusts
  • Adjustable hysterisis
  • Adjustable on site; display
  • Stainless steel / polymer compound material for maximum corrosion resistance
  • No further barrier required in the control cabinet
  • LED status indication
  • Smart installation
  • 24 VAC / DC
  • For use with IY.Ex-Sensors

IR.Ex Sensors

Specification:

  • II 1/2G Ex ia IIC T6/T5/T4 Ga/Gb
    II 2D Ex ia IIIC T75°C-T145°C Db
  • Intelligent sensor concept for connection (M12 connector) to SW.Ex universal Ex-transducer
  • Stainless steel / polymer compound material for maximum corrosion resistance
  • Room sensor for direct connection
  • For measuring in zone 0, 1, 2, 21, 22
  • Other sensors with M12 sensor cable (1 meter included, other lengths available)
  • For use with SW.Ex Transducer

6 advantages of pi safety switching amplifiers with relay output for Ex zones

Fully ATEX & IECEx certified for zones 1, 2, 21, 22 and measurement acquisition up to zone 0

No special approvals or restrictions required for dust zones

Direct on-site parameterization via button or display

No configuration tool or software required

Compact design with IP66 housing

Easy to install, robust, and suitable for harsh environments

Wide temperature range (–40°C to +70°C)

For flexible use indoors and outdoors

Installation without additional barrier (Zener barrier, Ex barrier)

Saves space and reduces installation effort

Fast support directly from pi safety

Technical queries and advice without ticket system or sales channels

Areas of application for Ex areas (ATEX zones):

Chemical and petrochemical plants

Pressure and temperature monitoring in safety-relevant processes

Pharmaceutical industry

Clean room sensor technology for monitoring process parameters under Ex conditions

Oil & gas production (onshore/offshore)

Monitoring of pipeline pressure, temperature or humidity

Paint, varnish, and solvent processing

Explosion-proof measurement transmission in sensitive mixing areas

Energy & power plant technology

Volume flow and temperature measurement for combustible media

Food industry with Ex areas

Volume flow and temperature measurement for combustible media

Switching amplifier with relay output
from pi safety for industrial applications

SW.Nc Switching Relais

  • Universal Switching Relay
  • Two adjustable potential free relay outputs
  • Ambient temperature -40…+70 °C
  • IP66
  • Adjustable on site, display
  • Highest corrosion resistance
  • Adjustable hysterisis
  • LED status indication
  • einfache Montage
  • 24 VAC / DC
  • For use with IR.Nc-Sensors

IR.Nc Sensoren

  • Intelligent sensor concept for connection (M12 connector) to SW.Nc universal switching relay
  • Highest corrosion resistance
  • Room sensor for direct connection
  • Other sensors for M12 sensor cable (1 meter included, other lengths available)
  • For use with SW.Nc universal switching relay

Advantages of pi safety switching amplifiers with relay output for industrial applications

Reliable signal processing:

clean separation and transmission of control signals

Robust & durable:

resistant to dust, moisture, and vibration (IP66)

Compact design:

space-saving for control cabinets, machines, and systems

Flexible application options:

ideal for mechanical engineering, HVAC, building technology, and much more

Easy integration:

compatible with common control systems and PLCs

Easy to maintain:

solid relay technology for long-term, trouble-free operation

Made in Germany:

durable components and reliable function

Direct support from pi safety:

support, advice, and customization without detours

Short delivery times:

our products are quickly available worldwide

Areas of application for industrial use

Mechanical and plant engineering

Real-time monitoring of pressure, temperature, humidity, or volume flow

Water & wastewater technology

Sensors for fill levels, media monitoring, and flow control

Building technology & HVAC systems

Integration for controlling heating, cooling, and ventilation systems

Automation technology & robotics

Continuous feedback of position and movement data

Food and packaging industry

Process control for temperature, pressure, or humidity

Renewable energies & environmental technology

Measurement data acquisition in solar, wind power, or biogas plants

FAQ about switching amplifiers with relay output

What is a switching amplifier with relay output?

A switching amplifier with relay output receives an electrical control signal (e.g. from a sensor or a control system) and uses it to switch a relay – e.g. to control machines, alarms or valves.

Are pi safety switching amplifiers approved for use in hazardous areas?

Yes – the SW.Ex series switching amplifiers are ATEX and IECEx certified and approved for use in zones 1, 2, 21, and 22. Channel sensors can also be operated in zone 0.

How is the electrical connection made?

The devices are ready to connect with plug-and-play terminal connections and M12 connectors and can be integrated directly into control cabinets.

Are the switching amplifiers with relay output suitable for continuous operation?

Yes – the pi safety models are designed for continuous switching cycles, are low-maintenance, and are designed for 24/7 industrial operation.

What protection class do the devices have?

All pi safety sensor switching amplifiers with relay output are IP66-protected – i.e., dustproof and sealed against strong water jets.

What distinguishes the Ex switching amplifier from a normal industrial switching amplifier?

The Ex switching amplifier meets additional safety requirements (e.g., housing pressure resistance, temperature resistance, type of ignition protection) and is certified for use in potentially explosive areas. Industrial devices are optimized for non-explosive zones.

How durable and low-maintenance are pi safety switching amplifiers?

pi safety uses high-quality industrial components and relays with a long mechanical service life. The stainless steel/polymer compound housing is corrosion-resistant, halogen-free, and silicone-free. The devices are “Made in Germany,” maintenance-free, and designed for continuous industrial operation.

How are they installed and commissioned?

Installation is simple and can be done directly on site. Intuitive operation and plug-and-play functionality make commissioning easy.

What certificates and documentation are available?

All relevant certificates (ATEX, IECEx) and technical documentation can be downloaded from the website.

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