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Specification & Description
| Specification | Description |
|---|---|
| Part Number | ESR4-NO-31 |
| Alternative Part Number | ESR4NO31 |
| Manufacturer | Moeller |
| Voltage | 115 V ac |
| Dimensions | 22.5 x 114 x 99 mm |
| Function | Safety Relay |
| Application | Designed for monitoring emergency stop and safety door applications in industrial environments |
| Mounting | DIN rail mountable |
| Output Contacts | 3 enabling current paths (NO), 1 signalling current path (NC) |
| Frequency | 50 Hz - 60 Hz |
| Operating Temperature | -25 to +55 °C ambient temperature |
| Storage Temperature | -25 to +75 °C |
| Weight | Approximately 0.20 kg to 0.25 kg depending on configuration |
| Protection Class | Housing/Terminals: IP 40/IP 20 |
| Compliance | IEC/EN 60947, VDE 0660, IEC/EN 60255, UL, CSA, EN 954-1 |
The Moeller ESR4-NO-31 Safety Relay is a vital component designed to enhance the safety of industrial automation systems. This compact and reliable device is engineered to monitor emergency stop signals and safety doors, ensuring machinery halts immediately during a hazard or unexpected event. With a 24V AC/DC operating voltage, it seamlessly integrates into various control systems.
The ESR4-NO-31 features dual-channel input for redundancy and increased safety, along with three enabling current paths and one signalling path. Its manual or automatic reset options provide flexibility in safety circuit design, catering to a wide range of safety applications up to Category 2 as per EN 954-1 standards.
Constructed with a robust design, the Moeller ESR4-NO-31 is suitable for harsh industrial environments, maintaining reliable operation and contributing to the overall safety and compliance of your machinery. Its straightforward installation process and LED indicators for power and channel status make it user-friendly and easy to monitor.
Incorporate the Moeller ESR4-NO-31 Safety Relay into your safety system to ensure a high level of protection for both your machinery and personnel.
Commonly Asked Questions
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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.
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Frequently Asked Questions
What is the purpose of the ESR4-NO-31 safety relay?
The ESR4-NO-31 safety relay is designed for monitoring emergency stop applications and safety doors. It ensures that machines and processes operate within safety parameters and helps to protect personnel and equipment by initiating an immediate stop in case of an emergency.
Can this safety relay be used for single-channel emergency stop monitoring?
Yes, the ESR4-NO-31 is suitable for single-channel emergency stop monitoring, providing a reliable solution for safety applications up to safety category 2 and stop category 0.
What are the voltage requirements for the ESR4-NO-31?
The ESR4-NO-31 safety relay operates with a rated voltage of 24 V AC/DC, making it versatile for use in various control circuit configurations.
How can I mount the ESR4-NO-31 safety relay?
The ESR4-NO-31 is designed for easy mounting onto a standard DIN rail, which simplifies installation and maintenance within electrical cabinets.
Does the ESR4-NO-31 have LED indicators?
Yes, the ESR4-NO-31 is equipped with green LED indicators for power and channel status, providing visual confirmation of the operating state and simplifying troubleshooting.
What type of contacts does the ESR4-NO-31 have?
The ESR4-NO-31 features 3 enabling current paths with positively driven contacts (NO) and 1 signalling current path (NC), ensuring reliable switching and signalling for safety functions.
Is the ESR4-NO-31 safety relay suitable for use in a protective housing?
Yes, the ESR4-NO-31 should be installed in a control cabinet with a minimum protection class of IP54 to ensure adequate protection against environmental factors.
What is the significance of the feedback loop in the ESR4-NO-31?
The feedback loop in the ESR4-NO-31 is used to monitor external contactors, ensuring that the safety function is maintained and that the contactors are functioning correctly as part of the safety system.
Can the ESR4-NO-31 be used for automatic start applications?
Yes, the ESR4-NO-31 can be configured for automatic start applications, allowing for flexibility in how the safety system is activated.
What should be done before activating the reset button on the ESR4-NO-31?
Before activating the reset button on the ESR4-NO-31, it is important to ensure that the emergency stop chain is closed and that the system is ready to be restarted safely.
Part conditions explained
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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.
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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.
