WEG SRW Safety Relays & Controllers
Configurable safety logic for E-stop, guard door, and light curtain applications.
SRW safety relays monitor safety devices, manage redundant circuits, and deliver diagnostic feedback to PLCs and HMIs. Combine them with WEG CSW emergency stops, SRW contactors, and TPW operator interfaces to build compliant safety systems faster.
Controller Portfolio
Single or dual-channel monitoring for E-stop, gate switches, and safety mats with SIL3/PL e certification.
Configurable logic modules with removable terminals, display, and USB programming for multi-zone safety.
Dedicated modules integrate Safe Torque Off (STO) and Safe Limited Speed (SLS) with WEG drives.
Monitoring Functions
Manual reset, automatic reset, and monitored reset sequences with LED diagnostics.
EDM (External Device Monitoring) for contactors, gate switches, and interlocks with restart inhibit.
OSSDs with cross-fault detection, muting logic, and safety outputs for machine stop.
Diagnostics & Communications
- LED status, display text, and Ethernet/Modbus diagnostics for rapid troubleshooting.
- Safe output monitoring with EDM feedback to verify contactor state.
- Configurable safety logic software with password protection and validation logs.
- Fieldbus gateways for status integration with PLC500, SCADA, and remote monitoring.
Certification Highlights
- SIL3, PL e, and Category 4 compliance across SRW safety relays and controllers.
- Meets EN ISO 13849, IEC 61508, and UL Category NISD requirements.
- Dual-channel redundant outputs with forced-guided contacts.
- Up to 31 expansion modules for multi-zone machine safety.
Build Compliant Safety Systems
Flexible Logic
Create configurable safety functions using drag-and-drop software with diagnostics trending.
Expanded I/O
Add input/output modules to monitor more devices without reprogramming the core controller.
Integrated Reset Controls
Pair with CSW push buttons and pilot lights for local reset, lamp test, and alarm indication.
Lifecycle Support
Receive risk assessment assistance, validation documentation, and maintenance procedures.
Safety Relay Comparison
| Model | Inputs / Outputs | Certified Level | Use Case |
|---|---|---|---|
| SRW01 | 2 dual-channel inputs / 3 safety outputs | SIL3, PL e, Cat. 4 | Emergency stop and gate switch monitoring with manual reset. |
| SRW02 | 4 dual-channel inputs / 4 safety outputs | SIL3, PL e, Cat. 4 | Light curtain applications with muting and EDM feedback. |
| SRW Safety Controller | Up to 14 inputs, 8 outputs expandable | SIL3, PL e with expansion | Multi-zone machines requiring custom logic, diagnostics, and networking. |
| Drive Safety Module | Safe Torque Off / Safe Limited Speed outputs | SIL3 / PL e | Integrate STO/SLS functions with CFW drives and PLC interlocks. |
Safety Engineering Services
Gross Automation delivers turnkey safety packages, from risk assessments to commissioning support. We document circuits, validate performance levels, and train maintenance staff on inspection procedures.
- Risk assessment workshops and SISTEMA calculations for compliance.
- Wiring diagrams, safety I/O tables, and validation checklists.
- Integration with PLC500, HMIs, and remote diagnostics dashboards.
- Field commissioning support including functional testing and documentation handover.
Turnkey Deliverables
Design Packages
Safety schematics, bill of materials, and enclosure layouts ready for fabrication.
Validation Reports
Proof of diagnostic coverage, PL calculations, and test records for audits.
Maintenance Playbooks
Inspection intervals, component replacement guides, and fault response procedures.
Documentation & Tools
- SRW safety relay manual, programming software, and example configurations.
- Emergency stop wiring diagrams and reset station templates.
- Validation checklist aligned with ISO 13849 and OSHA 1910 compliance.
- Maintenance log templates for periodic inspection documentation.
Need a Safety Partner?
Engage our TÜV-certified safety professionals to guide your project from concept to annual validation. We combine WEG hardware expertise with practical field experience.
Connect with Safety Engineer