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WE 77/EX-1
Pepperl + Fuchs WE 77/EX-1 available at EU Automation. Get in touch today for a quick price.
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Full 12-month warranty
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3. Your quote
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All orders are subject to product availability. See our T&Cs.
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What happens next?
1. Email confirmation
You will get an email confirming that we have received your enquiry.
2. Dedicated Account Manager
One of our team will be in touch to confirm your part(s) specification and condition.
3. Your quote
You will receive a comprehensive quote tailored to your specific needs.
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.
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.
| 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] |
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.
- Interface for NAMUR sensors in hazardous areas
- Signal isolation and transfer from hazardous to non-hazardous areas
- Control of intrinsically safe circuits within industrial automation systems
- Monitoring and detection of lead breakage in control circuits
- Adaptation and standardisation of 20 mA and 10 V standard signals
- Relay output for switching devices in safe areas based on signals from hazardous areas
- Use in control and instrumentation technology for process automation
- Installation in environments requiring ATEX certification for explosive atmospheres
This content has been produced using multiple sources. EU Automation takes no responsibility for the accuracy of this information. Always consult the original equipment manufacturer for the most up to date instructions and information.
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Customer reviews
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Daniel
Excellent customer service...
Alex Bailey is my main point of contact at EU Automation...he is extremely friendly, has exceptional customer service skills and always offers great pricing & lead times.
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Jerry Schrink
Tom Higgins provided amazing service
Tom Higgins provided great prompt service. I contacted Tom by phone and within 10 minutes there was a quote in my in box. WOW Thank you Tom and Thank you EU Automation!
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Paulo Pereira
Excellent service and communication…
Excellent service and communication from Alex Bailey. He truly goes above and beyond to ensure his clients are 100% satisfied. The entire process was seamless, and his attention to detail made a huge difference. Highly recommended for anyone looking for amazing service!
2 months ago
Gary
Tom Higgins did a great job at getting…
Tom Higgins did a great job at getting us the part we needed. He saw a concern with the part a verified before shipping.
3 months ago
Lessle Smith
Thomas Higgins has gone above and…
Thomas Higgins has gone above and beyond to make things happen for my facility. His customer service and knowledge were an asset in helping me with my order and the logistics challenges!
4 months ago
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