440R-EM4R2D Allen-Bradley Guardmaster Safety Relay

New Sealed | 24V DC

Product Overview

The 440R-EM4R2D New Sealed Allen-Bradley Guardmaster Safety Relay is a high-reliability industrial safety control device designed to monitor and control safety circuits in machine and factory automation systems. Manufactured by Rockwell Automation, this relay is part of the trusted Guardmaster® safety product family, engineered to meet strict industrial safety requirements.

Operating on 24V DC, the 440R-EM4R2D provides dependable monitoring for emergency stop devices, safety gates, and interlock systems, helping protect both personnel and equipment in demanding industrial environments.

Key Features

100% Genuine Allen-Bradley Product
Part Number: 440R-EM4R2D
Condition: New, Factory Sealed
Product Type: Guardmaster Safety Relay
Operating Voltage: 24V DC
Reliable Safety Monitoring & Fast Response
Compact Design for Control Panels
DIN Rail Mounting

Technical Specifications

Supply Voltage: 24V DC
Safety Outputs: 4 safety relay outputs + 2 auxiliary outputs
Monitoring Functions: Emergency stop, safety gate, interlock devices
Reset Type: Manual or monitored reset (system dependent)
Mounting Type: DIN rail
Brand: Allen-Bradley
Manufacturer: Rockwell Automation

📊 440R‑EM4R2D vs Common Guardmaster Safety Relays (Comparison Table)

Parameter	440R‑EM4R2D	440R‑GL2S2P	440R‑S13R2	440R‑EM4R2
Series / Type	EMD Expansion Safety Module	GLP Guardlocking Safety Relay	Single‑Input Safety Relay	EM Safety Expansion Module
Part Number	440R‑EM4R2D	440R‑GL2S2P	440R‑S13R2	440R‑EM4R2
Brand	Allen‑Bradley (Rockwell Automation)	Allen‑Bradley	Allen‑Bradley	Allen‑Bradley
Condition (Typical)	New / Factory Sealed	New / Factory Sealed	New / Factory Sealed	New / Factory Sealed
Operating Voltage	24V DC	24V DC	24V DC	24V DC
Safety Outputs	4 delayed relay outputs (EMD type)	2 OSSD solid‑state + auxiliary	3 safety relay outputs	4 safety relay outputs
Auxiliary Outputs	Yes (status / diagnostic)	Yes (N.C. solid state)	Yes (signalling)	Yes (solid state)
Function / Use Case	Delayed output expansion (controlled stop)	Guardlocking & proximity safety	Basic safety circuit monitoring	Output expansion
Typical Applications	Sequenced safety stop, machine shutdown stages	Guardlocking proximity & emergency stop circuits	Standard emergency stop & safety input monitoring	Expand safety outputs for master relays
Mounting	DIN Rail	DIN Rail	DIN Rail	DIN Rail
Safety Category & Performance Level*	Up to Cat. 4 / PL e / SIL 3	Up to Cat. 3 / PL d / SIL 2	Up to Cat. 3 / PL e / SIL 3	Up to Cat. 4 / PL e / SIL 3
Typical Power Consumption	~3.5 W	~2–2.5 W	~3.5 W	~3.5 W
Typical Output Current Rating	2 A per output @ 24V DC	~0.5–1.6 A max	~2 A @ 24V DC	~2 A @ 24V DC
Feedback / SWS Support	Yes (SWS input/output)	Yes	Yes	Yes
DIN Rail Width (approx)	22.5 mm	22.5 mm	~22.5 mm	22.5 mm
Best Suited For	Complex safety expansion	Advanced guardlocking / proximity systems	Simple safety monitoring	Additional safety outputs

*Safety category and performance levels depend on the overall safety system design and configuration; actual system compliance should be verified with relevant standards (EN ISO 13849‑1, IEC 61508).

Which Guardmaster Safety Relay Should You Choose?

🔹 440R‑EM4R2D

Best for complex safety expansions where multiple staged shutdowns are required
High safety performance: Cat. 4 / PL e / SIL 3
Ideal for new installations and safety upgrades
CTA: Buy 440R‑EM4R2D Now

🔹 440R‑GL2S2P

Designed for guardlocking and proximity monitoring
Perfect when multiple sensor interlocks and OSSD outputs are needed
Suitable for high-risk machinery with advanced safety systems
CTA: Buy 440R‑GL2S2P Now

🔹 440R‑S13R2

Simple, single-input safety relay
Good choice for standard emergency stop circuits or small machinery
Cost-effective solution for mid-range applications
CTA: Buy 440R‑S13R2 Now

🔹 440R‑EM4R2

Output expansion module without delayed outputs
Ideal when extra safety contacts are required beyond the master relay
Flexible and easy integration into existing Guardmaster systems
CTA: Buy 440R‑EM4R2 Now

⚡ Pro Tips to Maximize Safety & ROI

✅ Choose the EMD / EM modules for staged shutdown or expansion needs
✅ Choose GL series for guardlocking or interlock-heavy systems
✅ Always check safety category / PL / SIL requirements for your machine
✅ Keep spare units in inventory for critical machine downtime prevention

Applications

The 440R-EM4R2D Guardmaster Safety Relay is widely used in:

Machine safety control systems
Emergency stop circuit monitoring
Safety gate and interlock control
Packaging, assembly, and production machinery
Industrial automation safety upgrades

Safety & Compliance

Designed to meet international machine safety standards
Suitable for systems requiring high safety integrity levels*
Trusted by safety engineers and system integrators

* Safety category and performance level depend on overall system design.

Product Condition & Quality Assurance

Brand New, Factory Sealed Unit
Inspected for packaging integrity prior to shipment
Ideal for new installations, replacements, or spare inventory

Why Choose the 440R-EM4R2D Safety Relay?

Enhances operator and machine safety
Proven Guardmaster® reliability
Easy integration into existing safety circuits
Helps reduce downtime and safety-related faults

Shipping & Packaging

Original manufacturer packaging
Secure industrial-grade packing
Fast worldwide shipping available

440R-EM4R2D New Sealed 440REM4R2D AB Guardmaster Safety Relay 24V DC