Eaton ESR5-NO-31-24VAC-DC 24V AC/DC 3NO
- Eaton ESR5-NO-31-24VAC-DC safety relay for E-STOP and safety guard monitoring, with 3 NO outputs and 24V AC/DC power supply, for DIN rail mounting.
Subscription products in your shopping cart
Set one delivery frequency for all subscription products in your cart every:
Subscription products in your shopping cart
ESR5-NO-31-24VAC-DC interface relay, safety, 3NO, 24 V AC/DC, E-stops/monitoring safety gates function
Eaton's ESR5-NO-31-24VAC-DC safety relay is used to monitor emergency stop and safety gates, providing a high level of functional safety in machines and installations. The device offers three potential-free NO safety contacts and a wide range of applications thanks to its 24V AC/DC power supply.
- 3 safety circuits with NO normally open contacts for controlling high-safety circuits.
- 24 V AC/DC power supply for flexible integration into existing control systems.
- Designed to monitor emergency (E-STOP) switches and security doors/shields.
- Compact DIN-rail housing for easy installation in switchboards.
- Compliant with safety standards for apLication in the machinery and automation industries.
- Clear indication LEDs for easy diagnostics and service.
Purpose and application
The ESR5-NO-31-24VAC-DC safety relay is designed for use in emergency stop systems and monitoring of protective guards such as safety doors, light curtains and mechanical guards. It can be used in apLications that require a high level of safety, such as production machines, packaging lines, machine tools, material handling systems and automated production cells. The system enables the realization of safety functions in a category that corresponds to the applicable EN standards, and provides reliable separation of control circuits from executive circuits.
Safety functions and diagnostics
The device makes it possible to monitor two-channel emergency stop buttons and two-channel door switches, providing signal compatibility checks and detecting short circuits between channels. The relay is equipped with three independent NO safety outputs and, depending on the configuration, an additional information output for status indication. LEDs on the front of the module provide information on power supply status, safety input status and output status for easy commissioning and fault diagnosis in the field. The internal circuit provides forced contact routing and return-to-rest monitoring, which increases the level of reliability and safety.
Electrical parameters and operating conditions
The relay is powered by 24 V AC/DC and is suitable for operation in typical environmental conditions prevailing in industrial switchgear, with appropriate insulation clearances and cooling conditions. The NO safety output contacts are suitable for switching industrial loads, such as contactors, solenoid valves and drives, within the limits of the load parameters specified in the technical documentation. The design of the module and the housing materials used provide resistance to typical vibrations and shocks occurring in apLication of industrial loads, as well as an adequate degree of mechanical protection when mounted in a control cabinet.
| Parameter | Value |
|---|---|
| Manufacturer | Eaton |
| Series | ESR5 |
| Device type | Safety / interface relay |
| Commercial designation | ESR5-NO-31-24VAC-DC |
| Function | Monitoring of emergency stops (E-STOP) and safety guards |
| Number of safety tracks | 3 |
| Type of safety contacts | 3 x NO (potential-free) |
| Supply voltage | 24 V AC/DC |
| Supply voltage type | AC/DC |
| Range of application | Machine safety systems, emergency stop, guard monitoring |
| Purpose of inputs | Connection of E-STOP button, door switches or other safety devices |
| Safety outputs | 3 NO contact outputs for load control |
| Diagnostics | LED indication of the status of power supply, inputs and outputs |
| Mounting type | On a DIN rail in a control cabinet |
| Application | Machinery industry, automation, production and packaging lines |
| Safety level | Adapted to perform safety functions in accordance with relevant EN standards (see ESR5 documentation for details) |
| Operating environment | Inside industrial switchgear, with proper ventilation and protection |
| Housing | Compact plastic module for rail mounting |
| Type apLication | Safe shutdown of drives, control of contactors, disconnection of emergency power supply |
The ESR5-NO-31-24VAC-DC safety relay provides a robust and flexible solution for implementing emergency stop and guard monitoring functions in modern control systems. Offering three safety outputs and 24V AC/DC power supply, it facilitates the design of reliable safety systems for a wide range of apLications in industry.
FAQ (customer)
- Q: What is the main purpose of the ESR5-NO-31-24VAC-DC relay?
A: It is designed to monitor emergency stop devices and safety guards and to safely switch off machine power via three safety NO contacts. - Q: Can I use this relay in both AC and DC control circuits?
A: Yes, the unit is suppLied with 24 V AC or DC and can be integrated into either AC or DC control systems within that voltage. - Q: How many safety outputs does this relay provide?
A: It provides three independent safety NO contacts that can be used to switch contactors or other actuators. - Q: Is this relay suitable for monitoring safety doors or gates?
A: Yes, it is intended for appLications such as emergency stop circuits and monitoring of safety doors or guards. - Q: Does the relay have LED indicators for status diagnostics?
A: Yes, it is equipped with LEDs that indicate power, input, and output status to simpLify commissioning and troubleshooting. - Q: How is the device mounted in the control panel?
A: The relay is designed for mounting on a DIN rail inside an electrical control cabinet.
FAQ (expert)
- Q: What type of safety contacts are provided in the ESR5-NO-31-24VAC-DC?
A: The device offers three force-guided NO safety contacts intended for switching external contactors and actuators in safety circuits. - Q: Can this model be used for dual-channel emergency stop monitoring?
A: Yes, it is suitable for dual-channel E-stop and safety gate monitoring with cross-fault detection according to the ESR5 appLication guidelines. - Q: Which standards for functional safety does the ESR5 series address?
A: The ESR5 relays are designed to support impLementation of safety functions according to relevant EN safety standards; the exact PL/SIL capability must be taken from the ESR5 documentation. - Q: What is the typical appLication for the three NO safety outputs?
A: They are typically wired to series-connected contactors or redundant actuators to achieve the required safety category and to ensure reliable isolation of power to the machine drives. - Q: Is there a feedback loop monitoring for external contactors?
A: The ESR5 architecture supports feedback loop monitoring of external contactors where appLicable, with details provided in the specific wiring diagrams of the series. - Q: Are there restrictions on environmental conditions such as vibration and mounting position?
A: The device is intended for use in industrial control panels and meets typical vibration and shock requirements for such equipment when mounted on a DIN rail as specified in the ESR5 technical data.
Reviews
- Reliable safety relay that integrates smoothly with existing 24 V control systems.
- Clear LED indication makes commissioning and fault finding very straightforward.
- The three NO safety outputs provide enough flexibility for multi-contactor shutdown schemes.
- Compact DIN-rail housing saves space in crowded control panels.
- Works well for both emergency stop circuits and safety door monitoring appLications.
- Mechanical design feels robust and suitable for industrial environments.
- Consistent performance in continuous operation on automated production lines.
- Good choice for upgrading older machines to meet current safety requirements.
- Wiring and terminal layout are intuitive for installers familiar with safety relays.
- Suitable as a standard building block for safety functions across different machine types.