Lovato SRCES31 is a 24 V AC/DC single-function emergency-stop safety relay with 3NO + 1NC forcibly guided safety contacts for machine safety applications up to Category 4 and PLe.
£211.78
The Lovato SRCES31 is a compact single-function safety relay designed specifically for emergency-stop monitoring in industrial machinery and automation systems. Part of the Lovato SRC safety relay series, it provides 3NO + 1NC safety outputs using voltage-free, forcibly guided relay contacts for dependable safety-related machine control.
Designed for safety applications up to Category 4 and Performance Level e (PLe) according to EN ISO 13849-1, the SRCES31 provides two input channels for monitoring emergency-stop circuits. Its dedicated single-function architecture makes it a practical choice where reliable emergency-stop monitoring is required without the additional configuration associated with multifunction safety controllers.
The SRCES31 operates from a nominal 24 V AC/DC auxiliary supply with an operating range of 20.4–26.4 V AC/DC. Screw terminals and standard 35 mm DIN rail mounting simplify installation within industrial control panels, while the four safety contacts provide flexibility for switching multiple safety-related circuits.
Safety relays form an important interface between emergency-stop devices and the safety-related switching elements of industrial machinery. The Lovato SRCES31 monitors a two-channel emergency-stop circuit and provides multiple forcibly guided safety contacts for controlling downstream equipment as part of an appropriately designed safety system.
With three NO and one NC safety contacts, the SRCES31 provides additional switching flexibility for machinery requiring several safety-related output circuits. Its dedicated emergency-stop function, 24 V AC/DC supply and DIN rail format make it particularly suitable for machine builders and panel builders implementing conventional hard-wired safety architectures.
| HS Code | 85044090 |
|---|---|
| Manufacturer | Lovato Electric |
| Series | SRC |
| Model | SRCES31 |
| Product type | Single-function safety relay |
| Safety function | Emergency stop |
| Contact configuration | 3NO + 1NC |
| Safe NO outputs | 3 |
| Safe NC outputs | 1 |
| Output type | Voltage-free relays with forcibly guided contacts |
| Nominal auxiliary supply | 24 V AC/DC |
| Auxiliary supply operating range | 20.4–26.4 V AC/DC |
| Supply frequency | 50 / 60 Hz |
| Number of inputs | 2 |
| Input circuit resistance | max. 1 kΩ |
| Typical input current | 5 mA |
| AC-1 output rating | 5 A at 250 V AC, 1500 VA |
| AC-15 output rating | 5 A at 250 V AC |
| DC-1 output rating | 5 A at 24 V DC |
| DC-13 output rating | 5 A at 24 V DC |
| UL 508 pilot duty | B300 / R300 |
| Safety category | Up to Category 4 according to EN ISO 13849-1 |
| Performance level | Up to PLe according to EN ISO 13849-1 |
| Insulation voltage | 4 kV |
| Overvoltage category | III |
| Supply short-circuit protection | PTC |
| Mechanical endurance | 10,000,000 cycles |
| Electrical endurance | 100,000 cycles at AC-1 and 360 operations/hour |
| Connection type | Screw terminals |
| Mounting | 35 mm DIN rail |
| Front protection rating | IP40 |
| Terminal protection rating | IP20 |
| Pollution degree | 2 |
| Operating temperature | -20 to +55 °C |
| Storage temperature | -20 to +85 °C |
| Relative humidity | ≤93% |
| Device weight | 164 g |
| EAN | 8013975323960 |
The SRCES31 is a single-function safety relay designed for emergency-stop monitoring in industrial machinery and safety-related control systems.
The SRCES31 provides 3 normally open and 1 normally closed safety contacts, with voltage-free relay outputs using forcibly guided contacts.
The relay has a nominal auxiliary supply of 24 V AC/DC and an operating range of 20.4–26.4 V AC/DC.
The SRCES31 is designed for safety-related applications up to Category 4 and Performance Level e (PLe) according to EN ISO 13849-1, subject to the design and configuration of the complete safety system.
The SRCES31 provides two inputs for safety-related emergency-stop monitoring.
The SRCES31 version uses screw terminals for electrical connections, providing a conventional and secure wiring method for industrial control panels.
The SRCES31 is designed for installation on a standard 35 mm DIN rail inside an industrial control panel or machine electrical enclosure.
Lovato SRC safety relays provide machine builders, panel builders and automation engineers with dedicated safety monitoring solutions for emergency-stop circuits and safety-related machine control systems in industrial automation applications.
● Service Agreements
Credit Accounts
Our service agreements are built to support long term procurement relationships. By working closely with engineering teams and procurement departments, we help streamline purchasing processes while ensuring consistent access to critical components and sourcing support when it matters most.
● frequently asked questions
At Led Controls Ltd we help engineers source the right automation and control gear with confidence. below are quick answers to what we are asked most often.
We supply all leading manfacturers in our industry. we offer next day delivery on most poplour products.
Your content goes here. Edit or remove this text inline or in the module Content settings. You can also style every aspect of this content in the module Design settings and even apply custom CSS to this text in the module Advanced settings.
Your content goes here. Edit or remove this text inline or in the module Content settings. You can also style every aspect of this content in the module Design settings and even apply custom CSS to this text in the module Advanced settings.
Your content goes here. Edit or remove this text inline or in the module Content settings. You can also style every aspect of this content in the module Design settings and even apply custom CSS to this text in the module Advanced settings.
Your content goes here. Edit or remove this text inline or in the module Content settings. You can also style every aspect of this content in the module Design settings and even apply custom CSS to this text in the module Advanced settings.
● latest blog
LED Controls is a specialist distributor of factory automation and industrial controls, supplying OEMs, machine builders, panel builders and end users throughout the UK and worldwide. As a trusted UK distributor for many of the world’s leading automation manufacturers, we provide industrial control products, technical expertise and bespoke automation solutions backed by outstanding customer service.
2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...
2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...