Allen Bradley 440R-N23134 Safety Relay – MSR127RP, 115V AC, 3 N.O. + 1 N.C. Contacts, Manual Monitored Reset, Removable Terminals

The Allen Bradley 440R-N23134 (MSR127RP) is a single-function Guardmaster safety relay engineered for dependable monitoring of emergency stop circuits, magnetic interlock switches, and optoelectronic protection systems. Operating at a 115V AC supply, it provides three normally open (N.O.) safety contacts and one normally closed (N.C.) auxiliary output for system diagnostics and status indication.

Designed for maximum flexibility and compliance, the MSR127RP features manual monitored reset functionality, ensuring safe operator reactivation following a stop event. Compatible with single or dual-channel safety inputs (1NC / 2NC / 2PNP), this module meets Performance Level “e” per EN ISO 13849-1 and supports Category 0 stop according to IEC 60204. Its removable plug-in terminals simplify installation, wiring, and maintenance in control panels.

Technical Specifications

Model: 440R-N23134 Allen Bradley
Series: Guardmaster MSR
Product Type: Single-Function Safety Relay
Supply Voltage: 115V AC (50 Hz)
Voltage Type: AC
Input Configuration: 1-channel or 1- and 2-channel (1NC / 2NC / 2PNP)
Safety Outputs: 3 N.O. contacts
Auxiliary Output: 1 N.C. contact (for signalling)
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: Plug-in terminals (removable)
Dimensions (W x H x D): 99 x 114.5 x 22.5 mm

Electrical & Performance Details

• Supply Voltage Range: 115V AC ±10%
• Output Configuration: 3 N.O. safety contacts + 1 N.C. auxiliary contact
• Input Type: Single or dual-channel monitoring (1NC, 2NC, or 2PNP)
• Reset Function: Manual monitored reset for safe operator restart
• Safety Category: Category 4 / Performance Level e
• Stop Function: Category 0 (immediate power isolation)
• Feedback Circuit: Yes, for external contactor or relay monitoring
• Start Input: Yes (monitored start supported)
• Switching Type: Electromechanical relay contacts

Mechanical Specifications

• Width: 99 mm
• Height: 114.5 mm
• Depth: 22.5 mm
• Mounting: 35mm DIN rail
• Connection Type: Plug-in removable terminal blocks
• Housing: Slimline industrial enclosure for compact control panels

Environmental & Application Suitability

• Typical Applications: Emergency stop circuits, magnetic switch systems, and light curtain safety interfaces
• Monitoring Capability: Single or dual-channel input for redundancy and fault detection
• Stop Function: Category 0 stop for immediate shutdown
• Suitable For: Emergency stop buttons, interlock switches, and optical safety devices
• 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

✅ Three safety outputs provide robust machine circuit protection.

✅ One auxiliary N.C. contact for fault or status signalling.

✅ Manual monitored reset ensures operator-verified safety reactivation.

✅ Supports 1NC, 2NC, and 2PNP inputs for flexible integration.

✅ Performance Level e and Category 4 certification for top-tier reliability.

✅ Compact 22.5mm housing saves valuable panel space.

✅ Plug-in removable terminals allow quick installation and servicing.

📦 Order the Allen Bradley 440R-N23134 from Drive Outlet Megastore

At Drive Outlet Megastore we offer unbeatable Allen Bradley 440R-N23134 prices, with fast UK & EU delivery and expert support for Guardmaster safety relays and industrial protection systems.

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Ensure compliance and safety with the Allen Bradley MSR127RP – precision-engineered reliability trusted by automation professionals, available at Drive Outlet Megastore.