Allen Bradley 440R-N23133 Safety Relay – MSR127RP, 230V AC, 3 N.O. + 1 N.C. Contacts, Manual Monitored Reset, Single-Channel Input

The Allen Bradley 440R-N23133 (MSR127RP) is a single-function safety relay designed to monitor emergency stop circuits, magnetic switches, and optoelectronic safety devices. Operating on a 230V AC supply, it provides three normally open (N.O.) safety contacts and one normally closed (N.C.) signalling output, ensuring reliable safety performance across a wide range of industrial applications.

Featuring a manual monitored reset function, the MSR127RP ensures operators must actively reset the system following a stop condition, enhancing safety integrity. Compliant with Performance Level “e” under EN ISO 13849-1 and supporting Category 0 stop operation per IEC 60204, this compact relay is ideal for machinery requiring dependable safety control with removable connection flexibility and feedback monitoring capability.

Technical Specifications

Model: 440R-N23133 Allen Bradley
Series: Guardmaster MSR
Product Type: Single-Function Safety Relay
Supply Voltage: 230V AC (50 Hz)
Voltage Type: AC/DC compatible
Input Configuration: 1-channel monitored input
Safety Outputs: 3 N.O. relay contacts
Auxiliary Output: 1 N.C. contact (signalling function)
Reset Mode: Manual monitored reset
Performance Level (EN ISO 13849-1): Level e
Stop Category (IEC 60204): 0
Mounting Type: DIN Rail (35mm top hat)
Connection Type: Screw terminal connections
Dimensions (W x H x D): 99 x 114.5 x 22.5 mm

Electrical & Performance Details

• Supply Voltage Range: 115…230V AC (50 Hz)
• Control Voltage Option: 24V DC supported
• Output Configuration: 3 N.O. safety outputs + 1 N.C. auxiliary
• Output Type: Electromechanical relay contacts
• Input Type: Single-channel safety device monitoring
• Reset Function: Manual monitored reset ensures operator verification
• Safety Category: Category 4 / Performance Level e
• Stop Function: Category 0 (immediate stop)
• Feedback Circuit: Yes, for external contactor monitoring
• Start Input: Yes (monitored start supported)

Mechanical Specifications

• Width: 99 mm
• Height: 114.5 mm
• Depth: 22.5 mm
• Mounting: DIN Rail (35mm)
• Connection Type: Screw terminals (non-detachable)
• Housing Type: Compact safety relay enclosure for panel integration

Environmental & Application Suitability

• Typical Applications: Emergency stop circuits, magnetic safety switch monitoring, and light curtain interfacing
• Monitoring Capability: Single-channel input with feedback circuit for contactor control
• Stop Function: Category 0 (instantaneous power removal)
• Suitable For: E-stop, magnetic switch, and optical guard monitoring
• Installation Environment: Industrial control panels and safety cabinets

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
• BG BIA Approved: Yes
• CE Marked: Yes
• RoHS Compliant: Yes

Key Features & Benefits

✅ 3 N.O. safety outputs for secure control circuit interruption.

✅ 1 N.C. auxiliary contact provides reliable status signalling.

✅ Manual monitored reset ensures operator confirmation before restart.

✅ Category 0 stop function for rapid machine shutdown.

✅ Performance Level e for maximum safety assurance.

✅ Compact 22.5mm housing optimised for control cabinet integration.

✅ DIN rail mounting enables quick and easy installation.

📦 Order the Allen Bradley 440R-N23133 from Drive Outlet Megastore

At Drive Outlet Megastore we offer unbeatable Allen Bradley 440R-N23133 prices, with fast UK & EU delivery and expert support for Guardmaster safety systems and industrial machine protection solutions.

Check stock now or request a quote.

Ensure maximum operator safety and compliance with the Allen Bradley MSR127RP — reliable, monitored safety relay technology available at Drive Outlet Megastore.