Allen Bradley 440R-N23117 Single Function Safety Relay

The AB 440R-N23117 MSR126T is a single-function safety relay designed to monitor emergency stop devices and optoelectronic protection equipment in safety-critical control systems. Operating at 24V AC/DC, it supports both automatic and manual reset modes, enabling flexible deployment in diverse safety architectures.

With two safety-related N.O. contacts and dual-channel input evaluation, the 440R-N23117 provides high-integrity safety performance to Performance Level e per EN ISO 13849-1. It is an ideal solution for compact panels requiring reliable stop category 0 compliance and basic functional safety.

Technical Specifications

Model: 440RN23117
Series: Guardmaster MSR126T
Type: Single-Function Safety Relay
Function: E-stop and optoelectronic device monitoring
Reset Type: Automatic / Manual
Input Channels: 2-channel monitored
Output Contacts: 2 x N.O. (safety-related)
Feedback Loop: Yes
Stop Category: Category 0 (IEC 60204)

Electrical Specifications

Supply Voltage: 24 V AC/DC
Voltage Range (AC 50Hz): 24 V
Voltage Range (DC): 24 V
Voltage Type: AC/DC
Power Consumption: Approx. 2 W
Contact Configuration: 2 N.O.
Contact Rating: 6 A at 250 V AC / 24 V DC (resistive load)
Short Circuit Protection: External fuse recommended
Feedback Circuit: Included
Start Input: Yes (manual or monitored start via button)

Mechanical Specifications

Width: 75 mm
Height: 110 mm
Depth: 22.5 mm
Mounting Type: DIN rail (35 mm)
Connection Type: Screw terminals
Housing Material: Polycarbonate
Clamp Type: Fixed (non-detachable)
Installation Orientation: Any

Environmental Specifications

Operating Temperature: –10…55 °C
Storage Temperature: –25…85 °C
Humidity: 5% to 95% non-condensing
Vibration Resistance: 10–55 Hz, 0.35 mm (IEC 60068-2-6)
Shock Resistance: 10 g, 11 ms (IEC 60068-2-27)
Pollution Degree: 2
Ingress Protection: IP20 (terminals), IP40 (housing)
Certifications: CE, UL, BG BIA
Performance Level: PL e (EN ISO 13849-1)
SIL Classification: SIL 3 (IEC 61508, with appropriate architecture)

Compliance & Communication

Standard Compliance: EN ISO 13849-1, IEC 60204-1, IEC 60947-5-1
Approvals: UL, CE, BG BIA
Safety Integration: Ideal for light curtains, e-stop buttons, and safety switches
Monitoring Capability: Optoelectronic and emergency-stop circuits
Magnetic Switch Support: Not supported
Mounting Compliance: EN 50022 DIN rail

Key Features & Benefits

✅ Dual-Channel Monitoring – Enhanced redundancy and fault detection for high-integrity circuits

✅ Auto/Manual Reset Options – Flexible configuration for a wide range of safety applications

✅ Compact DIN-Rail Housing – Saves space in control cabinets with only 22.5 mm depth

✅ PL e / SIL 3 Rated – Meets highest safety standards in machine control and personnel protection

✅ UL and BG BIA Approved – Certified for global use in industrial automation systems

📦 Order the Allen Bradley 440R-N23117 from Drive Outlet Megastore

At Drive Outlet Megastore we offer unbeatable Allen Bradley 440R-N23117 prices. This versatile safety relay is ready for immediate dispatch for your next E-stop or light curtain installation.

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