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- Allen Bradley
- 440R-C23017
- Guardmaster Safety Relay
- USA
- 120 x 45.5 x 73 mm
- 0.51 kg
- Xiamen, China
- New & In Stock
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Product Overview
The Allen Bradley 440R-C23017 Guardmaster Safety Relay is a high-performance industrial safety relay engineered to monitor and control safety circuits in modern machine automation systems. As part of the trusted Guardmaster safety product family, this relay provides dependable monitoring of emergency stop devices, safety gate switches, interlock systems, light curtains, and other safety input devices while helping to ensure reliable machine shutdown during hazardous conditions.
The 440R-C23017 is designed to achieve high levels of machine safety by continuously monitoring safety inputs and internal relay operation. When a hazardous event or abnormal condition is detected, the relay immediately de-energizes its safety outputs, bringing machinery to a safe state and reducing the risk of injury or equipment damage.
Its compact design, integrated diagnostics, and straightforward installation make it suitable for new machine construction as well as safety system upgrades. The relay integrates easily with Allen Bradley PLCs, Guardmaster safety devices, and industrial automation systems, providing reliable safety control without adding unnecessary complexity.
With dimensions of 120 × 45.5 × 73 mm and an approximate weight of 0.51 kg, the relay occupies minimal cabinet space while delivering dependable safety monitoring for industrial applications.
Typical applications include manufacturing machinery, robotic cells, packaging equipment, conveyor systems, CNC machines, food and beverage processing lines, pharmaceutical equipment, automotive production systems, material handling equipment, and other industrial machinery requiring functional safety.
Technical Specifications
| Parameter | Specification |
|---|---|
| Manufacturer | Allen Bradley |
| Product Family | Guardmaster |
| Model | 440R-C23017 |
| Product Type | Safety Relay |
| Primary Function | Machine Safety Monitoring |
| Safety Inputs | Emergency Stop, Safety Switches, Light Curtains, Safety Devices |
| Safety Outputs | Safety Relay Outputs |
| Diagnostic Functions | Integrated Status Diagnostics |
| Reset Modes | Automatic and Manual Reset |
| Mounting Method | DIN Rail Mount |
| Housing Material | Industrial Flame-Retardant Plastic |
| Cooling Method | Natural Convection |
| Installation Location | Industrial Control Cabinet |
| Dimensions | 120 × 45.5 × 73 mm |
| Weight | Approximately 0.51 kg |
| Typical Application | Industrial Machine Safety Systems |
Function and Working Principle
The 440R-C23017 continuously supervises connected safety devices and determines whether machine operation is permitted.
Typical Safety Architecture
Emergency Stop Button
↓
Safety Gate Switch
↓
Light Curtain
↓
440R-C23017 Guardmaster Safety Relay
↓
Safety Contactors
↓
Machine Power Isolation
↓
Industrial Equipment
When all safety devices are operating normally, the relay energizes its safety outputs and permits machine operation.
If an emergency stop is activated, a guard door opens, or a safety device detects a hazardous condition, the relay immediately removes power from the safety outputs, stopping hazardous machine motion.
Key operating functions include:
- Emergency stop monitoring
- Safety gate monitoring
- Light curtain monitoring
- Dual-channel safety input supervision
- Cross-fault detection
- External device monitoring (EDM)
- Manual and automatic reset
- Internal self-monitoring
- LED diagnostic indication
- Reliable safety output switching
These functions help maintain high machine safety while minimizing unnecessary production interruptions.
Role in Industrial Control Systems
Within industrial automation systems, the 440R-C23017 serves as the dedicated functional safety controller between safety devices and machine power circuits.
Typical automation architecture:
Safety Devices
↓
440R-C23017 Guardmaster Safety Relay
↓
Safety Contactors
↓
Machine Actuators
↓
Industrial Equipment
↓
Production Process
The relay operates independently of standard machine control logic, providing a dedicated safety layer that protects personnel and equipment.
Industrial Applications
Manufacturing Automation
Typical applications include:
- Automated production lines
- Assembly machinery
- Robotic work cells
- Industrial presses
- Packaging equipment
Conveyor Systems
Suitable for:
- Material handling conveyors
- Distribution systems
- Warehouse automation
- Sorting equipment
- Pallet transfer systems
Robotic Cells
Common applications include:
- Robot safety zones
- Access gate monitoring
- Emergency stop circuits
- Operator protection systems
- Collaborative workstations
Food and Beverage Processing
Frequently installed in:
- Filling equipment
- Packaging machinery
- Mixing systems
- Conveyor lines
- Processing equipment
Pharmaceutical Manufacturing
Ideal for:
- Packaging systems
- Inspection equipment
- Filling machinery
- Sterile production equipment
- Laboratory automation
General Industrial Machinery
Widely used in:
- CNC machines
- Printing equipment
- Textile machinery
- Material handling equipment
- Automated manufacturing systems
Installation and System Integration
Before installation, engineers should verify:
- Safety circuit design
- Supply voltage compatibility
- Emergency stop wiring
- Safety switch connections
- External device monitoring wiring
- Protective grounding
- Cabinet ventilation
- PLC interface requirements
- Environmental conditions
- Functional safety validation
Recommended Installation Procedure
- Disconnect all electrical power.
- Mount the relay securely on the DIN rail.
- Connect the power supply.
- Wire all safety input devices.
- Connect safety output circuits.
- Configure reset mode.
- Connect external device monitoring if required.
- Verify wiring integrity.
- Restore system power.
- Check LED status indicators.
- Test emergency stop operation.
- Verify guard switch operation.
- Confirm safety output switching.
- Perform complete functional safety testing.
- Record commissioning results.
Proper installation ensures reliable safety performance and long-term operational stability.
Compatible System Components
| Component | Function |
|---|---|
| Allen Bradley Guardmaster Emergency Stop | Emergency machine stop |
| Guardmaster Safety Gate Switch | Guard door monitoring |
| Guardmaster Light Curtain | Presence detection |
| 440R-C23017 | Safety relay |
| Safety Contactor | Safe power isolation |
| ControlLogix PLC | Machine automation control |
| CompactLogix PLC | Integrated machine control |
| PanelView HMI | Operator interface |
| Safety Sensors | Hazard detection |
| Industrial Power Supply | System power |
Recommended Alternative Models
| Model | Product Type | Typical Application |
|---|---|---|
| 440R-C23017 | Guardmaster Safety Relay | Machine safety monitoring |
| 440R-C23178 | Guardmaster Safety Relay | Multi-function safety control |
| 440R-N23132 | Guardmaster Safety Relay | Emergency stop monitoring |
| 440R-D22R2 | Guardmaster Safety Relay | Compact machine safety |
| 440R-S13R2 | Guardmaster Safety Relay | General industrial safety circuits |
Key Advantages
- Trusted Guardmaster machine safety platform
- Reliable emergency stop monitoring
- Safety gate and light curtain supervision
- Dual-channel safety input monitoring
- Integrated self-diagnostics
- External device monitoring support
- Manual and automatic reset options
- Compact DIN rail installation
- Easy integration with Allen Bradley automation systems
- High operational reliability
- Dimensions 120 × 45.5 × 73 mm
- Approximate weight 0.51 kg
Technical FAQs
What is the Allen Bradley 440R-C23017?
The 440R-C23017 is a Guardmaster Safety Relay designed to monitor industrial machine safety circuits and safely control hazardous machine operation.
What is its primary function?
Its primary function is to monitor emergency stop buttons, safety gate switches, light curtains, and other safety devices while controlling safety outputs that stop machinery when hazardous conditions occur.
What are the physical dimensions?
The relay measures 120 × 45.5 × 73 mm.
What is the approximate weight?
The relay weighs approximately 0.51 kg.
Which safety devices are compatible?
It supports emergency stop buttons, interlock switches, guard door switches, light curtains, safety mats, and other compatible safety input devices.
Which industries commonly use this safety relay?
It is widely used in automotive manufacturing, packaging, food processing, pharmaceuticals, logistics, robotics, machine building, material handling, and general industrial automation.
Does the relay support diagnostic functions?
Yes. It provides integrated LED diagnostics, internal self-monitoring, and fault detection to improve machine availability and simplify troubleshooting.
Can it be integrated with Allen Bradley PLC systems?
Yes. The relay integrates easily with Allen Bradley ControlLogix, CompactLogix, Guardmaster safety products, and industrial automation systems.
Where is the relay typically installed?
It is typically mounted on a DIN rail inside industrial control cabinets as part of a machine safety control system.
Why is a safety relay important?
A safety relay provides a dedicated functional safety layer that helps prevent hazardous machine operation, protects personnel, reduces equipment damage, and supports compliance with industrial safety standards.
Conclusion
The Allen Bradley 440R-C23017 Guardmaster Safety Relay is a reliable and compact machine safety solution designed to provide dependable monitoring of emergency stop devices, safety gates, light curtains, and other industrial safety equipment. Its integrated diagnostics, dual-channel monitoring capabilities, and flexible reset options help improve machine safety while minimizing production downtime.
With compact dimensions of 120 × 45.5 × 73 mm and an approximate weight of 0.51 kg, the 440R-C23017 is ideal for cabinet-mounted industrial safety systems. When integrated with compatible Guardmaster safety devices, Allen Bradley PLCs, safety contactors, and industrial automation equipment, it delivers dependable functional safety and long-term operational reliability across a broad range of manufacturing and process automation applications.