With its 750 XTR Series of products since 2014, WAGO offers a solution that broadens the range of use for machines and systems with regard to environmental conditions and external interference factors, while providing the highest degree of flexibility. Whether temperatures from a frigid -40 °C to a hot 70 °C, vibrations up to 5g or heights up to 5,000 m above sea level, the 750 XTR I/O System can be used everywhere. It also has increased immunity to impulse voltages and interference in accordance with EN 60870-2-1. From the start, WAGO has continuously developed and optimized the 750 XTR Series for customers around the world. WAGO has defined a new dimension of use with the latest development for the 750 XTR Series. One thing is certain: The new intrinsically safe I/O modules don't like it just hot or cold, but are also available for hazardous areas starting in June 2017

Engineers are constantly faced with the challenge of designing machines and systems as economically and effectively as possible, yet to develop a finished product for the world market. The jungle from import regulations as well as local standards and guidelines is a complex determinant. Much more obvious and at least as demanding are the different and sometimes extreme environmental conditions in which the equipment is used. Conditions range from moderate temperatures in Central Europe to strong temperature fluctuations between day and night in Central Asia, high humidity in Indonesia, extreme drought in the Andes to ice-cold Siberian winters. Mobile systems must also cover as broad a range of applications as possible. A drilling rig may be deployed just of the coast of Brazil as in the high-lying deposits in northern Norway and Canada or in the middle of the Arabian desert. The same applies to the deck superstructures of tankers or cargo liners the maneuver on our world's oceans.

Maximum Flexibility beyond Zonal Boarders
With its latest innovation of the XTR Series, WAGO provides a system that can be used for signals, for example, from non-hazardous areas that are intrinsically safe. The WAGO-I/O-SYSTEM 750 XTR can be used either outside of hazardous areas and within zone 2/22 inside an approved enclosure. All modules have ATEX/IECEx approval for use in zone 2/22. Besides the standard signals from the sensors and actuators from zone 2/22, intrinsically safe sensors and actuators from zones 0/20 and 1/21 can also be integrated via the I/O modules in the blue enclosure. The intrinsically safe part of the control system must be started with the Ex i supply module that regulates the input voltage of 24 V (-25 % to 30 %) to 24 V +/- 0.3 V, limiting it to max. 26.8 V in case of failure. The module thus prevents ignitable sparks from occurring in case of failure. To protect against possible interference from the non-intrinsically safe area of the control system, the Ex i power supply is installed in a wider housing that ensures required safety distance of 50 mm. The narrow 12 or 24 mm modules for digital and analog input and output signals, temperature measurements via resistance sensors and potentiometers or meter signals are connected to the Ex i power supply on the right. Up to eight channels are available depending on the module. Up to three secondary variables can be read via the HART protocol in addition to the main variables via one of the 2-channel analog input modules (750-484/040-000), thus paring down the number of measuring points required. Whether shut-off valve limit switches, slider magnetic valves or regulator valve control and position feedback, the 750 XTR Series provides the right intrinsically safe I/O module for every field device.

eXTReme Properties for Extreme Requirements
The XTR in the module designation stands for “eXTReme” ambient conditions. The permissible ambient temperature range of −40 °C to +70 °C enables the modules to be used an any climatic zone without having to provide additional protection with air conditioning or heating systems. The module's immunity to impulse voltages and interference even permit it to be used in medium-voltage systems. Due to its extreme vibration and shock resistance, the XTR modules for the intrinsically safe area even meet the requirements for rail vehicles and are suitable for installation on marine diesel engines. All of the circuit boards are coated with protective varnish, to safeguard the power electronics and conducting tracks against short-term condensation.

This linking of requirements for intrinsic safety and resistance to extreme ambient conditions makes the WAGO-I/O-SYSTEM 750 XTR a special asset for systems in the oil and gas industry in the upstream sector (extraction, processing), as well as in the downstream sector (transport, refining) or for outdoor systems exposed to extreme climatic swings. The WAGO-I/O-SYSTEM 750 XTR functions not only as a purely remote I/O system, but also offers a versatile, future-oriented and reliable control system with the high-performance PFC controllers.

Increased Efficiency and Cost Minimization
The WAGO-I/O-SYSTEM 750 XTR enables the development of an optimized and globally applicable automation concept for systems and machines to reduce or economize the design for air-conditioning and ventilation systems and reduce the cost of overvoltage protection. Product maintenance costs as well as maintenance and storage costs at the end customer are also minimized. Manufacturers and operators thus benefit from numerous advantages.

Infobox “The Advantage of Flexibility” or graphic (XTR symbols)
• eXTReme temperature range -40 °C … +70 °C
• eXTReme immunity to impulse voltages and interference (acc. EN 60870-2-1)
• eXTReme vibration resistance 5g (acc. EN 60068-2-6)
• eXTReme continuous shock resistance up to 25g (acc. IEC 60068-2-27)
• eXTReme intrinsic safety (signal acquisition from zones 0 and 1)
• Short-term condensation per Class 3K7 (acc. EN 60721-3-3)
• Operating altitude up to 5,000 m above sea level
• Approvals: UL, ANSI/ISA, ATEX/IECEx,
• Installation location: Zone 2/22

The Eight New Intrinsically Safe Modules for Extreme Conditions
Infographic/table of the new modules:
Item No. Description
750-606/040-000 Power Supply 24 VDC Ex i XTR
750-439/040-000 8DI NAMUR Ex i XTR
750-535/040-000 2DO 24 VDC Ex i XTR
750-486/040-000 4AI 0/4-20mA Ex i XTR
750-484/040-000 2AI 4-20mA HART Ex i XTR
750-481/040-000 2AI RTD Ex i XTR
750-585/040-000 2AO 0-20mA Ex i XTR
750-633/040-000 Up/Down Counter Ex i XTR

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