Allen-Bradley 440R-M23088 Guardmaster Minotaur MSR138.1DP Safety Relay
The Allen-Bradley 440R-M23088Â is a high-performance Guardmaster Minotaur MSR138.1DP Monitoring Safety Relay designed to safely stop machinery in industrial environments. This versatile, dual-input safety relay features both immediate and time-delayed safety outputs, making it ideal for applications requiring controlled stopping procedures (such as braking systems or stopping hazardous motion before unlocking guard doors).
| Specifications | |
| Product Make | ALLEN-BRADLEY |
| Part Number / MPN | Â 440R-M23088 |
| Product Series | Â Guardmaster Minotaur MSR138.1DP |
| Supply Voltage | Â 24V AC/DC |
| Power Consumption | 2.5 W / 5 VA |
| Immediate Safety Outputs | 2 N.O. (Normally Open) |
| Delayed Safety Outputs | 2 N.O. (Normally Open) |
| Auxiliary Outputs | 1 N.C. (Normally Closed) Immediate |
| Time Delay Range | 0.5 to 10 Seconds (Adjustable) |
| Reset Types | Automatic, Manual, or Monitored Manual |
| Condition | NEW |
| Warranty | 1 YEAR |
| Country of Origin | Germany |
| Protection Degree | IP40 (Housing), IP20 (Terminals) |
| Length | 114.5 mm |
| Width | 45 mm |
| Height | 99 mm |
| Weight | 350 g |









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