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10+
Manufacturers in Stock
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PL a–e
Performance Level (ISO 13849)
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SIL 1–3
Safety Integrity Level (IEC 62061)
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B2B
Specialist B2B Trade
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Safety Relays – Reliable Protection for People and Machinery
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Safety relays and safety switching devices form the central link between the sensor level and actuator level in safety-related control systems. They monitor emergency stop buttons, safety guards, light curtains and two-hand controls – and ensure the machine is reliably brought to a standstill when a fault is detected or a protective function is triggered. Unlike standard control relays, safety relays operate with redundant, positively guided relay contacts per IEC 61810-3 and integrated self-monitoring. Modern safety switching devices are selected in accordance with the requirements of the Machinery Directive 2006/42/EG and applicable national regulations. Achievable safety parameters range from Performance Level PL a to PL e (ISO 13849-1) and Safety Integrity Level SIL 1 to SIL 3 (IEC 62061). With the right device, complex safety functions such as speed monitoring, standstill monitoring or safe torque off can be realised in full compliance with applicable standards. Our B2B assortment covers safety relays for all common protective sensor types: emergency stop switching devices, safety gate monitoring relays, two-hand safety relays, light curtain evaluation units as well as safety timing relays and expansion modules. Manufacturers such as Pilz, Schmersal, Euchner and Siemens set the standards for international machine safety. Technical Sales: +49 (0)7666 / 88499-0 | sales@industry-electronics.com |
Top Manufacturers in Stock
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Safety Relay Types Overview
Six device classes covering all safety-relevant protective functions in industry and mechanical engineering.
| ⚠ Emergency Stop Relays Monitor emergency stop pushbuttons (category 0/1 per ISO 13850) and ensure the safe de-energisation of the machine. Redundant NC contacts with cross-circuit detection up to PL e / SIL 3. | ► Safety Gate Monitoring Relays Evaluate safety position switches and interlocks. Reliably detect open or bypassed safety guards and prevent machine start-up with the guard open. | ✚ Two-Hand Safety Relays Require simultaneous actuation of both operator hands before triggering hazardous tool movements. Type III C per EN 574 – highest protection for presses and punching machines. | ||
| ⚡ Light Curtain Evaluation Units Evaluate safety light curtains, grids and single-beam photoelectric sensors. Support blanking and muting functions for automated infeed systems without unnecessary machine stops. | ◆ Safety Timing Relays Safety-rated run-down monitoring and switch-on delay for rotating masses and access release. Sequential control with self-monitoring compliant up to PL d. | ⚙ Expansion and Coupling Relays Extend base units with additional safe output channels (OSSD). Safe coupling relays provide galvanic isolation between safety circuits and signal amplification for large control cabinet assemblies. | ||
Typical Application Areas
Safety relays are used wherever people and equipment must be protected from hazardous machine movements.
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Manufacturing
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Robotics & Automation
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Conveyor & Logistics
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Process & Heavy Industry
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Mechanical Engineering
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Packaging Technology
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Medical Technology
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Food & Beverage
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Automotive Industry
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Energy Supply
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Why Industry-Electronics?
Your specialised B2B partner for safety switching devices from leading manufacturers.
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10+ Brand Manufacturers
Pilz, Schmersal, Euchner, Siemens, Schneider Electric, ABB and further specialists for standards-compliant machine safety from a single source.
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Standards-Compliant Products
All safety relays comply with ISO 13849, IEC 62061 and EN 60947-5-1. Machinery Directive-compliant up to PL e / SIL 3 for the highest protection requirements.
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Technical Application Support
Our specialists support you in selecting the right safety relay for your application and the required Performance Level.
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B2B Volume Pricing
Attractive quantity discounts for OEMs, system integrators and procurement departments. Individual pricing and framework agreements on request.
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Short Delivery Times
Many safety relays available from stock. Short lead times for maintenance replacements and urgent commissioning projects.
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Specialist B2B Trade Only
Business customers only – no retail sales. Over 20 years of experience in B2B electronic distribution for industry and commerce.
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Top sellers in Safety relay
ABB DALTON TONGUE A Daltontongue A ABB DALTON TONGUE
A
37,90 EUR
ABB JSD-TD1-330700371,17 EUR
E.Dold & Soehne KG 0048700DOLD BN3081.63/61 AC/DC24V
Expansion module
269,95 EUR
E.Dold & Soehne KG 0032155Dold emergency stop module
BN5983.53DC24V,
367,24 EUR
E.Dold & Soehne KG 0031885Dold BN5983.
384,68 EUR
Euchner 084132 TP4-4131A024Msafety switch, TP4-4131A024M
275,68 EUR
Euchner TP4-4141A024M safetyswitch 084275
307,04 EUR
Euchner 098942220,97 EUR
Euchner TZ2LE024RC18VAB-C1826safety switch with magnetic
lock.085180
619,42 EUR
Euchner TZ2RE024RC18VAB-C1826safety switch with magnetic
lock.085181
619,42 EUR
Metz Connect 110657 BTRMulktifunktions Timer
MARK E08,
29,57 EUR
Safety relay from ABB
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 ABB 1SCA022812R7510 OTP125BA4M safety switch 4p 90 A 415V m.rt-yellow
ABB's safety switches in housings meet the equipment standard DIN EN 60947-3. The switches are suitable for use as repair and maintenance switches. Our range includes versions in plastic housings, ...Lieske Part No.: 331116 Mfg Part No: 1SCA022812R7510 Type: OTP125BA4M |
597,96 EUR
 ≈ £507.67 | ≈ $685.86
Delivery time on requestinfo_outline
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ABB Sentry BSR10 24VDC 2TLA010040R0000
The Sentry series from ABB covers the entire spectrum of safety relays, from basic models for simple safety applications or for multiplying safety outputs, to highly flexible universal models with ... Lieske Part No.: 1950296 Mfg Part No: 2TLA010040R0000 Type: Sentry BSR10 24VDC |
258,26 EUR
≈ £219.26 | ≈ $296.22
Delivery time on requestinfo_outline
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ABB Sentry BSR11 24VDC safety/expansion relay 4 NO 2TLA010040R0200
The Sentry series from ABB covers the entire spectrum of safety relays, from basic models for simple safety applications or for multiplying safety outputs, to highly flexible universal models with ... Lieske Part No.: 1349040 Mfg Part No: 2TLA010040R0200 Type: Sentry BSR11 24VDC |
258,26 EUR
≈ £219.26 | ≈ $296.22
Delivery time on requestinfo_outline
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ABB 2TLA010040R0201 SentryBSR11P SENTRY BSR11P SAFETY RELAY Relay outputs
The Sentry series from ABB covers the entire spectrum of safety relays, from basic models for simple safety applications or for multiplying safety outputs, to highly flexible universal models with ... Lieske Part No.: 673446 Mfg Part No: 2TLA010040R0201 Type: Sentry BSR11P |
282,92 EUR
≈ £240.20 | ≈ $324.51
Delivery time on requestinfo_outline
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ABB Sentry BSR23 24VDC expansion relay 2TLA010041R0600
The Sentry series from ABB covers the entire spectrum of safety relays, from basic models for simple safety applications or for multiplying safety outputs, to highly flexible universal models with ... Lieske Part No.: 1950297 Mfg Part No: 2TLA010041R0600 Type: Sentry BSR23 24VDC |
224,52 EUR
≈ £190.62 | ≈ $257.52
Delivery time on requestinfo_outline
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ABB 2TLA010041R0601 SentryBSR23P SENTRY BSR23P SAFETY RELAY Relaisausgänge
Die Baureihe Sentry von ABB umfasst das gesamte Spektrum an Sicherheitsrelais, von Basismodellen für einfache Sicherheitsanwendungen oder zur Vervielfachung von Sicherheitsausgängen, bis hin zu ... Lieske Part No.: 874611 Mfg Part No: 2TLA010041R0601 Type: Sentry BSR23P |
246,59 EUR
≈ £209.35 | ≈ $282.84
Delivery time on requestinfo_outline
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ABB Sentry SSR10 24VDC safety relay relay outputs 3 NO +1 2TLA010050R0000
The Sentry series from ABB covers the entire spectrum of safety relays, from basic models for simple safety applications or for multiplying safety outputs, to highly flexible universal models with ... Lieske Part No.: 1349054 Mfg Part No: 2TLA010050R0000 Type: Sentry SSR10 24VDC |
315,36 EUR
≈ £267.74 | ≈ $361.72
Delivery time on requestinfo_outline
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ABB Sentry SSR10P SENTRY SSR10P 24VDC SA relay outputs 3NO+1NC
The Sentry series from ABB covers the entire spectrum of safety relays, from basic models for simple safety applications or for multiplying safety outputs, to highly flexible universal models with ... Lieske Part No.: 1956027 Mfg Part No: 2TLA010050R0001 Type: Sentry SSR10P |
347,81 EUR
≈ £295.29 | ≈ $398.94
Delivery time on requestinfo_outline
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ABB Sentry SSR10M VAC/VDC safety relay 2TLA010050R0100
The Sentry series from ABB covers the entire spectrum of safety relays, from basic models for simple safety applications or for multiplying safety outputs, to highly flexible universal models with ... Lieske Part No.: 1950298 Mfg Part No: 2TLA010050R0100 Type: Sentry SSR10M VAC/VDC |
389,34 EUR
≈ £330.55 | ≈ $446.57
Delivery time on requestinfo_outline
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ABB 2TLA010050R0101 SentrySSR10MP SENTRY SSR10MP SAFETY RELAY Relay outputs
The Sentry series from ABB covers the entire spectrum of safety relays, from basic models for simple safety applications or for multiplying safety outputs, to highly flexible universal models with ... Lieske Part No.: 673447 Mfg Part No: 2TLA010050R0101 Type: Sentry SSR10MP |
427,14 EUR
≈ £362.64 | ≈ $489.93
Delivery time on requestinfo_outline
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ABB Sentry SSR20 24VDC safety relay relay outputs 3 NO +1 2TLA010051R0000
The Sentry series from ABB covers the entire spectrum of safety relays, from basic models for simple safety applications or for multiplying safety outputs, to highly flexible universal models with ... Lieske Part No.: 1950299 Mfg Part No: 2TLA010051R0000 Type: Sentry SSR20 24VDC |
347,81 EUR
≈ £295.29 | ≈ $398.94
Delivery time on requestinfo_outline
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ABB Sentry SSR20M VAC/VDC safety relay 2TLA010051R0100
The Sentry series from ABB covers the entire spectrum of safety relays, from basic models for simple safety applications or for multiplying safety outputs, to highly flexible universal models with ... Lieske Part No.: 2089380 Mfg Part No: 2TLA010051R0100 Type: Sentry SSR20M |
439,74 EUR
≈ £373.34 | ≈ $504.38
Delivery time on requestinfo_outline
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ABB Sentry SSR32 24VDC safety relay relay outputs 2 NO +2 2TLA010052R0400
The Sentry series from ABB covers the entire spectrum of safety relays, from basic models for simple safety applications or for multiplying safety outputs, to highly flexible universal models with ... Lieske Part No.: 1950300 Mfg Part No: 2TLA010052R0400 Type: Sentry SSR32 24VDC |
490,14 EUR
≈ £416.13 | ≈ $562.19
Delivery time on requestinfo_outline
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ABB 2TLA010052R0401 SentrySSR32P SENTRY SSR32P SAFETY RELAY Relaisausgänge
Die Baureihe Sentry von ABB umfasst das gesamte Spektrum an Sicherheitsrelais, von Basismodellen für einfache Sicherheitsanwendungen oder zur Vervielfachung von Sicherheitsausgängen, bis hin zu ... Lieske Part No.: 874612 Mfg Part No: 2TLA010052R0401 Type: Sentry SSR32P |
543,06 EUR
≈ £461.06 | ≈ $622.89
Delivery time on requestinfo_outline
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ABB Sentry SSR42 24VDC safety relay relay outputs 2 NO +2 2TLA010053R0400
The Sentry series from ABB covers the entire spectrum of safety relays, from basic models for simple safety applications or for multiplying safety outputs, to highly flexible universal models with ... Lieske Part No.: 1950301 Mfg Part No: 2TLA010053R0400 Type: Sentry SSR42 24VDC |
490,14 EUR
≈ £416.13 | ≈ $562.19
Delivery time on requestinfo_outline
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ABB 2TLA010053R0401 SentrySSR42P SENTRY SSR42P SAFETY RELAY Relaisausgänge
Die Baureihe Sentry von ABB umfasst das gesamte Spektrum an Sicherheitsrelais, von Basismodellen für einfache Sicherheitsanwendungen oder zur Vervielfachung von Sicherheitsausgängen, bis hin zu ... Lieske Part No.: 874613 Mfg Part No: 2TLA010053R0401 Type: Sentry SSR42P |
543,06 EUR
≈ £461.06 | ≈ $622.89
Delivery time on requestinfo_outline
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ABB Sentry TSR10 24VDC safety relay/timer 2TLA010060R0000
The Sentry series from ABB covers the entire spectrum of safety relays, from basic models for simple safety applications or for multiplying safety outputs, to highly flexible universal models with ... Lieske Part No.: 1877149 Mfg Part No: 2TLA010060R0000 Type: Sentry TSR10 24VDC |
395,64 EUR
≈ £335.90 | ≈ $453.80
Delivery time on requestinfo_outline
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ABB Sentry TSR20 24VDC 2TLA010061R0000
The Sentry series from ABB covers the entire spectrum of safety relays, from basic models for simple safety applications or for multiplying safety outputs, to highly flexible universal models with ... Lieske Part No.: 1877150 Mfg Part No: 2TLA010061R0000 Type: Sentry TSR20 24VDC |
315,36 EUR
≈ £267.74 | ≈ $361.72
Delivery time on requestinfo_outline
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ABB Sentry TSR20M VAC/VDC 2TLA010061R0100
The Sentry series from ABB covers the entire spectrum of safety relays, from basic models for simple safety applications or for multiplying safety outputs, to highly flexible universal models with ... Lieske Part No.: 1877151 Mfg Part No: 2TLA010061R0100 Type: Sentry TSR20M VAC/VDC |
398,16 EUR
≈ £338.04 | ≈ $456.69
Delivery time on requestinfo_outline
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ABB Sentry USR10 24VDC 2TLA010070R0000
The Sentry series from ABB covers the entire spectrum of safety relays, from basic models for simple safety applications or for multiplying safety outputs, to highly flexible universal models with ... Lieske Part No.: 1950302 Mfg Part No: 2TLA010070R0000 Type: Sentry USR10 24VDC |
464,94 EUR
≈ £394.73 | ≈ $533.29
Delivery time on requestinfo_outline
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ABB Sentry USR22 24VDC 2TLA010070R0400
The Sentry series from ABB covers the entire spectrum of safety relays, from basic models for simple safety applications or for multiplying safety outputs, to highly flexible universal models with ... Lieske Part No.: 1877152 Mfg Part No: 2TLA010070R0400 Type: Sentry USR22 24VDC |
648,90 EUR
≈ £550.92 | ≈ $744.29
Delivery time on requestinfo_outline
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ABB 2TLA010070R0401 SentryUSR22P SENTRY USR22P SAFETY RELAY Relay outputs
The Sentry series from ABB covers the entire spectrum of safety relays, from basic models for simple safety applications or for multiplying safety outputs, to highly flexible universal models with ... Lieske Part No.: 673448 Mfg Part No: 2TLA010070R0401 Type: Sentry USR22P |
711,90 EUR
≈ £604.40 | ≈ $816.55
Delivery time on requestinfo_outline
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ABB 2TLA019995R0000 JSHD4-1-AA 3-position enabling switch without LEDs, additional button and hand detection
Enabling devices are used for troubleshooting, programming and checking when no other safety devices are possible or suitable. The enabling device is hand-held and the operator can either press the ... Lieske Part No.: 321698 Mfg Part No: 2TLA019995R0000 Type: JSHD4-1-AA |
452,34 EUR
≈ £384.04 | ≈ $518.83
Delivery time on requestinfo_outline
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ABB ABB JSHD4-1-AC 3-position enabling switch without LEDs, additional buttons and hand recognition
Enabling devices are used for troubleshooting, programming and checking when no other safety devices are possible or suitable. The enabling device is hand-held and the operator can either press the ... Lieske Part No.: 1337294 Mfg Part No: 2TLA019995R0100 Type: JSHD4-1-AC |
505,26 EUR
≈ £428.97 | ≈ $579.53
Delivery time on requestinfo_outline
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Standards and Directives for Safety Relays
The selection and use of safety switching devices is clearly governed by international standards and EU directives.
| ISO 13849-1 – Performance Level Defines requirements for safety-related parts of control systems (SRP/CS). The standard specifies 5 Performance Levels (PL a to PL e) and describes how to calculate them using category, MTTF, DC and CCF. The primary standard for machine builders in the EU. | IEC 62061 – Safety Integrity Level Standard for safety-related electrical control systems in industry. Assesses safety functions via Safety Integrity Level (SIL 1 to 3) based on PFH values (probability of dangerous failure per hour). Used alongside or as an alternative to ISO 13849. | EN 60947-5-1 – Low-Voltage Switchgear Product standard for electromechanical control devices. Governs technical requirements for control and signalling circuits, switching devices and positively guided contacts. Basis for CE marking of safety relays. | ||
| Machinery Directive 2006/42/EC EU directive establishing essential health and safety requirements for machinery. Safety relays are frequently part of the evidence for the declaration of conformity. From 2027 it will be replaced by the Machinery Regulation (EU) 2023/1230. | IEC 61810-3 – Positively Guided Contacts Defines requirements for electromechanical elementary relays with positively guided contacts. The positive guidance ensures that NC and NO contacts can never be closed simultaneously – the fundamental principle of relay safety. | EN 574 – Two-Hand Controls Safety standard specifically for two-hand controls. Defines three types (I, II, III) with different levels of protection. Type III C (simultaneous actuation, anti-defeat) is the highest level and is required for presses and stamping machines. | ||
Performance Level vs. Safety Integrity Level
Both metrics describe the ability of a safety function to prevent a dangerous failure – calculated according to different standards.
| PL (ISO 13849) | SIL (IEC 62061) | PFH Range (failures/h) | Typical Application |
| PL a | – | ≥ 10⁻⁵ to < 10⁻⁴ | Simple guards, low risk categories |
| PL b | SIL 1 | ≥ 10⁻⁶ to < 10⁻⁵ | Simple guards, minor injury risk |
| PL c | SIL 1 | ≥ 10⁻⁷ to < 10⁻⁶ | Safety gates, simple guard rails, medium risks |
| PL d | SIL 2 | ≥ 10⁻⁸ to < 10⁻⁷ | Emergency stop, interlocked safety gates, light curtains |
| PL e | SIL 3 | ≥ 10⁻⁹ to < 10⁻⁸ | Highest requirements: presses, robot cells, ATEX zones |
Single-Channel vs. Dual-Channel Evaluation
The number of channels is decisive for the achievable Performance Level and fault tolerance of the safety function.
► Single-Channel Evaluation (Category B, 1, 2)
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⚠ Dual-Channel Evaluation (Category 3, 4)
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Related Categories in the Shop
Further products from the Industrial Relays and Contactors range at Industry-Electronics.
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► Industrial Relays Standard switching relays and coupling relays for general switching tasks in automation and control engineering. |
► Industrial Timing Relays Timing relays for start-up delays, run-down functions and cyclic control tasks in automation technology. |
► Contactors Power contactors and motor protection switches for safe switching of drives, motors and loads up into the kW range. |
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► Isolating Switches / Measuring Relays Transducer relays, monitoring relays and isolating amplifiers for process automation and plant engineering. |
► Electronic Components Electronic control and regulation modules, voltage monitors and control relays for industrial control tasks. |
► All Industrial Relays & Contactors To the complete range of the Industrial Relays and Contactors category with all sub-sections. |
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⚠ Safety Relay Technical Support
Uncertain about which safety relay is right for your application? Our technical team advises on device selection, Performance Level, wiring concepts and standards compliance – personally and without detours. +49 (0)7666 / 88499-0 | sales@industry-electronics.com |