Allen Bradley 440R-S12R2 Safety Relay – GSR Series, 24V DC, 2 N.O. Safety Outputs + 1 N.C. Solid-State Auxiliary, Single-Channel Input

The Allen Bradley 440R-S12R2 is a Guardmaster GSR (Global Safety Relay) designed for monitoring single-channel safety devices such as emergency stops, safety mats, or light curtains. Operating at 24V DC, it provides two normally open (N.O.) safety contacts and one solid-state normally closed (N.C.) auxiliary output for system diagnostics and status indication.

This compact, high-integrity relay achieves Performance Level “e” per EN ISO 13849-1 and supports Category 0 stop functionality as defined in IEC 60204. The spring clamp terminal connections simplify wiring and ensure secure, vibration-resistant installation. Ideal for use in applications requiring a single safety input, the 440R-S12R2 offers dependable performance in both light curtain and emergency stop systems.

Technical Specifications

Model: 440R-S12R2 Allen Bradley
Series: Guardmaster GSR
Product Type: Single-Input Safety Relay
Supply Voltage: 24V DC
Voltage Type: DC
Input Configuration: 1-channel safety input
Safety Outputs: 2 N.O. contacts
Auxiliary Output: 1 N.C. solid-state output
Performance Level (EN ISO 13849-1): Level e
Stop Category (IEC 60204): 0
Mounting Type: DIN Rail (35mm top hat)
Connection Type: Spring clamp connection
Dimensions (W x H x D): 22.5 x 119.4 x 113.6 mm

Electrical & Performance Details

• Supply Voltage Range: 24V DC ±10%
• Output Configuration: 2 N.O. safety contacts + 1 N.C. solid-state auxiliary
• Input Type: Single-channel monitoring for E-stop, mat, or light curtain
• Stop Function: Category 0 (immediate stop)
• Performance Level: PL e / Category 4
• Start Input: Yes (monitored start supported)
• Feedback Circuit: Not required
• Muting Function: No
• Output Type: Electromechanical safety outputs + solid-state auxiliary

Mechanical Specifications

• Width: 22.5 mm
• Height: 119.4 mm
• Depth: 113.6 mm
• Mounting: 35mm DIN rail
• Connection Type: Spring clamp terminals for fast, tool-free wiring
• Housing Type: Compact industrial-grade enclosure

Environmental & Application Suitability

• Typical Applications: Emergency stop circuits, safety mats, light curtains, and magnetic safety switches
• Monitoring Capability: Single-channel safety input
• Stop Function: Category 0 (immediate shutdown)
• Suitable For: E-stops, optical safety barriers, and contact-based safety sensors
• Installation Environment: Industrial control panels and automation enclosures

Compliance & Certifications

• Performance Level: PL e (EN ISO 13849-1)
• Safety Category: Category 4 (IEC 62061)
• Stop Category: 0 (IEC 60204)
• UL / cUL Listed: Yes
• CE Marked: Yes
• RoHS Compliant: Yes

Key Features & Benefits

✅ Single-channel safety input ideal for simple E-stop or light curtain systems.

✅ Two safety outputs (2 N.O.) provide redundancy for high safety integrity.

✅ Solid-state auxiliary output for reliable system feedback and diagnostics.

✅ Compact 22.5mm housing saves control panel space.

✅ Spring clamp terminals allow quick, vibration-resistant installation.

✅ Category 0 stop function for immediate machine shutdown.

✅ PL e / Category 4 rated for top-tier functional safety compliance.

📦 Order the Allen Bradley 440R-S12R2 from Drive Outlet Megastore

At Drive Outlet Megastore we offer unbeatable Allen Bradley 440R-S12R2 prices, with fast UK & EU delivery and expert support for Guardmaster GSR safety relays and machine protection solutions.

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Protect your operators and equipment with the Allen Bradley 440R-S12R2 — a compact, high-performance GSR safety relay trusted for dependable industrial safety control, available now from Drive Outlet Megastore.