Allen Bradley 440R-M23086 Safety Relay – MSR138.1DP, 115V AC, 3 Delayed N.O. Safety Outputs, Category 1 Stop, Adjustable 0.5–10s Delay

The Allen Bradley 440R-M23086 (MSR138.1DP) is a monitoring safety relay with delayed outputs, designed for emergency stop, magnetic switch, and optoelectronic protection system applications. Operating from a 115V AC supply, this safety relay provides three delayed normally open (N.O.) safety outputs with an adjustable release delay from 0.5 to 10 seconds for controlled machine shutdown sequences.

Featuring single-channel or dual-channel input monitoring and Performance Level “e” (EN ISO 13849-1) compliance, the MSR138.1DP delivers reliable safety response in demanding industrial environments. The plug-in removable terminals simplify wiring and servicing, while the DIN rail mountable 99mm-wide enclosure allows flexible installation in compact control panels.

Technical Specifications

Model: 440R-M23086 Allen Bradley
Series: Guardmaster MSR
Product Type: Monitoring Safety Relay with Delayed Outputs
Supply Voltage: 115V AC (50 Hz)
Voltage Type: AC
Input Configuration: 1-channel or 1- and 2-channel
Safety Outputs (Delayed): 3 N.O. contacts
Auxiliary Outputs: None
Performance Level (EN ISO 13849-1): Level e
Stop Category (IEC 60204): 1
Release Delay: Adjustable 0.5…10 seconds
Mounting Type: DIN Rail (35mm top hat)
Connection Type: Plug-in connection with detachable clamps
Dimensions (W x H x D): 99 x 114.5 x 45 mm

Electrical & Performance Details

• Supply Voltage Range: 115V AC ±10%
• Safety Outputs: 3 delayed N.O. contacts
• Output Type: Electromechanical relay contacts
• Input Type: Single or dual-channel for redundancy
• Release Delay: Adjustable 0.5 to 10 seconds
• Stop Function: Category 1 (controlled stop)
• Safety Category: Category 4 / Performance Level e
• Feedback Circuit: Yes, for external contactor monitoring
• Start Input: Yes (supports manual/automatic start)
• Muting Function: No

Mechanical Specifications

• Width: 99 mm
• Height: 114.5 mm
• Depth: 45 mm
• Mounting: 35mm DIN rail
• Connection: Plug-in removable terminals
• Construction: Compact relay housing with detachable clamps

Environmental & Application Suitability

• Typical Applications: Emergency stop monitoring, magnetic interlock switches, light curtains, and other optoelectronic protection systems
• Monitoring Capability: Supports single or dual-channel input devices
• Stop Function: Category 1 controlled stop with delayed shutdown
• Suitable For: E-stop circuits, magnetic switches, and photoelectric sensors
• Not Suitable For: Position switches, proximity sensors, or tactile sensors
• Installation Environment: Industrial control panels and machine safety systems

Compliance & Certifications

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

Key Features & Benefits

✅ Three delayed safety outputs provide controlled machine power-down.

✅ Adjustable delay (0.5–10s) for flexible stop configuration.

✅ Supports Category 1 controlled stops for safety-critical applications.

✅ Dual-channel input monitoring ensures redundancy and fault detection.

✅ Performance Level e and SIL-rated design for maximum operator safety.

✅ Plug-in terminals simplify installation and maintenance.

✅ Compact design ideal for modern safety control panels.

📦 Order the Allen Bradley 440R-M23086 from Drive Outlet Megastore

At Drive Outlet Megastore we offer unbeatable Allen Bradley 440R-M23086 prices, with fast UK & EU delivery and technical support for Guardmaster safety systems and machine safety integration.

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Ensure safe, controlled stops in your machine systems with Allen Bradley MSR138.1DP relays — engineered for reliability and compliance, available at Drive Outlet Megastore.