Lovato SRASM20 is a 24 V DC single-function safety relay with 2NO forcibly guided safety outputs for monitoring OSSD devices with integrated safety functions and EDM up to Category 4 and PLe.
£210.60
The Lovato SRASM20 is a compact single-function safety relay for OSSD devices with integrated safety functions, designed for reliable monitoring of safety-related circuits in industrial machinery and automation systems. Part of the Lovato SRA safety relay series, it provides 2NO safety outputs and supports external device monitoring (EDM) for integration with compatible safety equipment.
The SRASM20 is specifically designed for safety devices equipped with OSSD (Output Signal Switching Device) outputs. These include compatible optoelectronic and electronic safety devices where the safety function is integrated into the protective device itself, allowing the relay to interface the OSSD signals with machine safety control circuits.
Operating from a nominal 24 V DC auxiliary supply, the SRASM20 uses two relay safety outputs with forcibly guided contacts. It is designed for safety applications up to Category 4 and Performance Level e (PLe) according to ISO 13849-1, making it suitable for demanding machine-safety installations.
OSSD outputs are commonly provided by electronic protective equipment such as safety light curtains, laser scanners and RFID safety devices. The two-channel signals allow faults to be detected by the safety control system, helping ensure that hazardous machine functions are stopped when the protective device is actuated or a safety-related fault is detected.
The Lovato SRASM20 is dedicated to OSSD devices with integrated safety functions and provides two forcibly guided NO relay outputs for interfacing with downstream machine-control equipment. Its EDM functionality enables monitoring of external switching devices such as contactors as part of an appropriately designed safety-related control system.
| HS Code | 85365080 |
|---|---|
| Manufacturer | Lovato Electric |
| Series | SRA |
| Model | SRASM20 |
| Product type | Single-function safety relay |
| Safety function | Monitoring of OSSD devices with integrated safety functions / EDM |
| Contact configuration | 2NO |
| Number of safe NO outputs | 2 |
| Output type | Relays with forcibly guided contacts |
| Nominal auxiliary supply | 24 V DC |
| Number of inputs | 2 |
| Input voltage | 0–30 V DC |
| Typical input current | 4.3 mA |
| AC-1 output rating | 6 A at 250 V AC, 2000 VA |
| AC-15 output rating | 5 A at 230 V AC |
| DC-13 output rating | 2 A at 24 V DC |
| UL 508 pilot duty | B300 / Q300 |
| Safety category | Up to Category 4 according to ISO 13849-1 |
| Performance level | Up to PLe according to ISO 13849-1 |
| Insulation voltage | 4 kV |
| Overvoltage category | III |
| Mechanical endurance | >107 cycles |
| Electrical endurance | 105 cycles at AC-1 and 360 operations/hour |
| Mounting | 35 mm DIN rail |
| Front protection rating | IP40 |
| Terminal protection rating | IP20 |
| Pollution degree | 2 |
| Operating temperature | -25 to +55 °C |
| Storage temperature | -30 to +70 °C |
| Relative humidity | ≤95% |
| Weight | 150 g |
| EAN | 8013975296158 |
The SRASM20 is a single-function safety relay designed to monitor compatible safety devices equipped with OSSD outputs and integrated safety functions.
The SRASM20 provides 2 normally open safety outputs using relays with forcibly guided contacts.
The SRASM20 has a nominal auxiliary supply voltage of 24 V DC.
The SRASM20 is designed for safety-related applications up to Category 4 and Performance Level e (PLe) according to ISO 13849-1, subject to correct design and configuration of the complete safety system.
Yes. The SRASM20 is designed for compatible safety equipment with OSSD outputs, which can include safety light curtains, laser scanners and RFID safety devices.
Yes. The SRASM20 is designed for OSSD devices with integrated safety functions and supports external device monitoring (EDM) for suitable downstream switching devices.
The SRASM20 is designed for mounting on a standard 35 mm DIN rail inside an industrial machine control panel or electrical enclosure.
Lovato SRA safety relays provide machine builders, panel builders and automation engineers with dependable interfaces for OSSD safety devices and safety-related machine control systems in modern industrial automation applications.
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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...