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Pepperl + Fuchs WE 77/EX-1

Name: WE 77/EX-1
Brand: Pepperl + Fuchs
SKU: WE 77/EX-1
Price: 69.4 GBP
Availability: InStock

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£69.40 (ex. VAT)

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Marvo Stock ID MV-1YF7

HS Code 85389091

SKU WE 77/EX-1

Condition New unboxed

Warranty 12 months

Weight (kg) 1.00

Length (mm) 300.00

Width (mm) 190.00

Height (mm) 150.00

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Specification & Description

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Commonly Asked Questions

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Specification & Description

Specification	Description
Part Number	WE 77/EX-1
Alternative Part Number	WE77Ex1
Manufacturer	Pepperl + Fuchs
Supply Voltage	198 ... 253 V AC; 45 ... 65 Hz
Power Loss	1.6 W
Power Consumption	Approx. 2.3 VA
Input Connection	Terminals 1-, 2+
Rated Values	Acc. to EN 60947-5-6 (NAMUR)
Open Circuit Voltage	Approx. 8 V DC
Short-Circuit Current	Approx. 8 mA
Switching Point/Hysteresis	1.2 ... 2.1 mA / approx. 0.2 mA
Pulse/Pause Ratio	≥ 0.5 ms / ≥ 0.5 ms
Lead Monitoring Breakage	I ≤ 0.1 mA
Output Connection	Terminals 7, 8, 9
Output Signal	Relay
Contact Loading	253 V AC/2 A/500 VA/cos φ min. 0.7; 125 V AC/4 A/500 VA cos φ min. 0.7; 40 V DC/2 A/80 W ohmic load
Energised/De-energised Delay	Approx. 10 ms / approx. 20 ms
Mechanical Life	10^7 switching cycles
Switching Frequency	< 10 Hz
Electrical Isolation	Output/power supply basic insulation according to IEC 61140, rated insulation voltage 300 Veff
Ambient Temperature	-25 ... 60 °C (-13 ... 140 °F)
Protection Degree	IP20
Dimensions	40 x 104 x 110 mm (1.6 x 4.1 x 4.3 in)
Mass	Approx. 390 g
EC-Type Examination Certificate	PTB 02 ATEX 2065
Type of Protection	¬ II (1)GD [EEx ia] IIC [circuit(s) in zone 0/1/2]

The Pepperl + Fuchs WE 77/EX-1 is a high-quality switch amplifier designed to facilitate the safe and efficient transfer of digital signals from hazardous to non-hazardous areas. This device is particularly suitable for use in control and instrumentation technology, where it provides galvanic isolation for standard signals such as 20 mA and 10 V, or for adapting and standardising signals.

Constructed for durability and reliability, the WE 77/EX-1 is compatible with a 230V AC supply voltage and features a single relay output with one changeover contact. It supports a reversible mode of operation and includes lead breakage (LB) monitoring to ensure the integrity of connections.

The switch amplifier is designed for mounting on a 35 mm DIN mounting rail in accordance with EN 60715, ensuring easy integration into existing systems. It boasts an IP20 protection degree, safeguarding against solid objects larger than 12.5 mm but not against water, making it suitable for controlled environments.

With a robust operating temperature range of -25 to 60°C, the WE 77/EX-1 can withstand challenging industrial environments. Its compact dimensions and approximate weight of 390 g make it an unobtrusive addition to any setup.

The device is certified with an ATEX marking of II (1)GD [EEx ia] IIC for circuits in zone 0/1/2, indicating its suitability for use in explosive atmospheres. It also complies with the relevant EMC and low voltage directives, ensuring it meets the stringent standards required for industrial equipment in the European market.

The Pepperl + Fuchs WE 77/EX-1 switch amplifier is an essential component for professionals seeking to maintain signal integrity and safety in industrial applications involving hazardous areas.

Commonly Asked Questions

Is my order covered by a warranty?

Marvo provides a full 12-month warranty on all products, whatever the condition. For your peace of mind, all parts are ‘Marvo Approved’ which means that they have been tested and checked to ensure that they are in working condition. If you are unhappy with the part(s) you received and would like to request a return, you can do so by completing our quick and easy online form. Once we have received your Returns Request, a member of the team will be in touch to discuss this further with you. You can read more about our warranty policy here.

What payment methods do you accept?

We accept card payments from all major credit, debit and Mastercard providers including Visa, American Express, Western Union, Paypal and bank transfers. Before you complete an order you will be prompted to input your payment details, at which point you can enter the relevant card information you wish to use for your transaction. If you are experiencing issues with your payment method then you can contact our team via email here. From there, you will be directed to the most relevant resource or person to help you complete your payment, get your order processed and ensure that your parts are on the way to your delivery address.

Is Marvo a credible parts supplier?

Marvo is a highly credible supplier of industrial automation parts and components with dedicated hubs around the world offering industry-leading products and services. Marvo is committed to providing a quick, easy and reliable place to source your automation and control components. All purchases come as standard with a comprehensive 12-month return to base warranty meaning that, in just a few clicks, you can source critical parts more seamlessly than ever before. Click here to read an article on how Marvo is redefining convenience for automation and manufacturing professionals.

Have steps been taken to ensure quality control?

Marvo takes pride in product quality and has put several measures in place to assure high levels of quality standards. For your peace of mind, all parts have been ‘Marvo Approved’ which means that they have been tested and checked to ensure that they are in working condition. Redefine convenience and secure priority delivery on all parts along with a comprehensive 12-month warranty. This is the smart new way to buy automation and control components.

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Martin Ruml

‘Rapid delivery.’

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‘Quick response and fast delivery of the product.’

Milan Kosík

‘Large selection of spare parts, fast delivery.’

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Our service to you

Lightning-Fast Express Shipping: Receive your order in record time with our express shipping options, ensuring you minimize downtime and keep your projects on track.

No-Risk Returns, Guaranteed: Return your parts anytime for a full refund. Our hassle-free return policy ensures you’re never stuck with something you don’t need.

Clear Pricing with No Hidden Fees: What you see is what you pay, transparent pricing with no extra costs, ever. Rest assured, all taxes and fees are already included in your final price.

Rock-Solid Reliability at a Fraction of the Cost: Get pre-owned electronic parts that are fully tested for peak performance, saving you money without compromising on quality, backed by a comprehensive warranty.

Frequently Asked Questions

What is the intended use of this switch amplifier?

The switch amplifier is designed for use in control and instrumentation technology for the galvanic isolation of signals such as 20 mA and 10 V standard signals, or for adapting or standardizing signals. It is also used for transferring digital signals from NAMUR sensors or dry contacts from hazardous areas to non-hazardous areas.

Can this device be used in hazardous areas?

The device itself must be installed outside of the hazardous area. However, it has intrinsically safe circuits that are used for operating intrinsically safe field devices within hazardous areas.

What are the mounting requirements for this device?

The device should be mounted on a 35 mm DIN mounting rail according to EN 60715 and must be installed in a controlled environment that ensures a pollution degree 2 or better. It is designed for stationary use and should be protected against mechanical hazards.

What type of input signals can the switch amplifier handle?

The switch amplifier can handle digital signals from NAMUR sensors or dry contacts. It is capable of lead breakage monitoring and has a reversible mode of operation.

What are the ambient operating conditions for this device?

The ambient temperature range for the device is from -25 to 60 degrees Celsius (-13 to 140 degrees Fahrenheit). It should be operated within these temperature limits to ensure proper functioning.

What type of output does the switch amplifier provide?

The device provides a relay output with one changeover contact, allowing for the control of connected devices based on the input signal received from the hazardous area.

What are the power supply requirements for the switch amplifier?

The rated voltage for the power supply is 198 to 253 V AC with a frequency range of 45 to 65 Hz. The power consumption is approximately 2.3 VA.

What certifications does the switch amplifier hold?

The switch amplifier holds an ATEX certificate with the marking II (1)GD [EEx ia] IIC for circuits in zone 0/1/2, indicating it is suitable for use in certain hazardous environments.

How is the device protected against electrical interference?

The device has basic insulation according to IEC 61140 between the output and power supply, and safe galvanic isolation according to EN 50020 between the input/output and input/power supply.

What should be done if the device is damaged or polluted?

If the device is found to be damaged or polluted, it should not be used. It cannot be repaired or modified, and in the case of a defect, it should be replaced with an original device.

Part conditions explained

We want your buying experience to be as seamless as possible. So, here are all of the product descriptions you will see when browsing Marvo, explained a little further:

New unsealed: The product is in its original packaging, but the packaging has been opened or unsealed. It has never been used and should be in near pristine condition.

New sealed: The product is sealed in its original packaging. It has never been opened or used, ensuring that it's in an untouched state.

New unboxed: The product does not come in its original packaging, but it has never been used and is in great working condition.

Refurbished: The product has been previously used, but it has undergone a thorough refurbishment process to restore it to a like-new or functional condition. Any defects or issues have been addressed, making it suitable for reuse.

Used: The product has been previously owned and has been used. It may show signs of wear and tear but is still functional and operational. The condition may vary depending on the specific item and its usage history.

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