Allen Bradley 440R-S07139 Guardmaster Safety Relays
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| Mobile | +8613666084105 | |||||||
| +8613666084105 | ||||||||
| 13666084105 | ||||||||
| Add to | Room 1004, No. 62 Xiangxiu Li, Siming District, Xiamen City, Fujian Province, China | |||||||
Technical Specifications
| Parameter | Specification |
|---|---|
| Brand | Allen-Bradley |
| Manufacturer | Rockwell Automation |
| Product Series | Guardmaster / MSR |
| Model Number | 440R-S07139 |
| Product Name | Guardmaster CU2 Safety Relay |
| Product Type | Stop Motion Detection Safety Relay |
| Application | Machine standstill monitoring and safety interlocking |
| Main Function | Monitors machine motion and provides a safety signal when the monitored equipment reaches a stopped condition |
| Rated Supply Voltage | 24 V AC/DC |
| Supply Voltage Type | AC/DC |
| Safety Stop Category | Category 1 |
| Safety Category | Category 1 |
| Performance Level | PL c |
| Safety Integrity Level | SIL CL 1 |
| Reset Type | Automatic / Manual |
| Safety Outputs | 2 normally open (NO) outputs |
| Auxiliary Output | 1 normally closed (NC) output |
| Rated Operational Current | 5 A at 250 V AC |
| Rated Operational Current | 3 A at 24 V DC |
| Minimum Switching Current | 10 mA |
| Input Monitoring | Stop-motion detection using compatible proximity sensors |
| Sensor Compatibility | Compatible NPN and PNP proximity sensor configurations |
| Terminal Type | Fixed, non-removable terminal block |
| Mounting Type | 35 mm DIN rail |
| Status Indicators | LED indicators |
| Housing Material | Polyamide (PA6 / PA66) |
| Housing Protection Rating | IP40 |
| Terminal Protection Rating | IP20 |
| Operating Temperature | -10 to +55°C |
| Mechanical Service Life | 2,000,000 cycles |
| Impulse Withstand Voltage | 2.5 kV |
| Maximum Conductor Cross-Section | 4 mm² |
| Minimum Conductor Cross-Section | 0.20 mm² |
| Overall Dimensions | 120 × 45.5 × 73 mm |
| Weight | 0.36 kg |
| Product Lifecycle | Discontinued on December 31, 2020 |
FAQ
1. What is the main function of the Allen-Bradley 440R-S07139 Guardmaster Safety Relay?
The 440R-S07139 is a CU2 stop-motion detection safety relay designed to monitor whether a machine or rotating component has come to a complete stop. It works with compatible proximity sensors to detect machine movement and provides a safety output when the monitored motion reaches the required stopped condition. It is commonly used in applications where access to a machine must be controlled until hazardous movement has ceased.
2. How does the 440R-S07139 detect machine standstill?
The CU2 monitors signals from compatible NPN or PNP proximity sensors installed near the rotating or moving equipment. When the machine is running, the sensors generate pulses that indicate movement. Once the pulse activity meets the configured standstill detection conditions, the relay changes its output state to indicate that the monitored motion has stopped. Correct sensor positioning and wiring are essential for reliable operation.
3. Which proximity sensors are compatible with the 440R-S07139?
The CU2 is designed to work with compatible 24 V DC proximity sensors, including NPN and PNP types. Sensor selection depends on the required sensing distance and the mechanical arrangement of the monitored equipment. Common sensor options include 12 mm, 18 mm, and 30 mm models. Always verify the sensor wiring and specifications against the CU2 connection diagram.
4. What are the power supply and output contact ratings of this safety relay?
The 440R-S07139 operates with a 24 V AC/DC supply. Its rated operational current is 5 A at 250 V AC under AC-15 conditions and 3 A at 24 V DC under DC-13 conditions. It provides two normally open safety outputs and one normally closed auxiliary output. The connected load must remain within the applicable contact ratings and switching requirements.
5. What is the difference between automatic reset and manual reset on the 440R-S07139?
Automatic reset allows the relay to return to its operating state when the required input and standstill conditions are satisfied. Manual reset requires an operator action through the configured reset circuit before the system can resume operation. The appropriate reset method depends on the machine risk assessment and safety circuit design. Resetting the relay must not cause unexpected machine movement or create an unsafe access condition.
6. What should be checked if the 440R-S07139 does not detect machine standstill correctly?
First, inspect the proximity sensors and confirm that they are installed at the correct distance from the rotating target. Check the 24 V DC sensor supply, NPN/PNP wiring, signal connections, and sensor pulse generation. Also inspect the relay’s LED indicators and terminal connections. Incorrect sensor alignment, damaged cables, unstable power, or an unsuitable detection arrangement can prevent reliable standstill monitoring.
7. What safety standards and performance levels does the 440R-S07139 support?
The CU2 is specified for Safety Category 1 and Performance Level PL c under the applicable ISO 13849 standards. It also has a SIL CL 1 claim under IEC/EN 62061 and supports Category 1 stopping under IEC/EN 60204-1. These ratings apply to the relay under specified conditions; the complete machine safety function must be assessed as part of the overall safety circuit.
8. Is the Allen-Bradley 440R-S07139 still available, and what should be considered when replacing it?
Rockwell Automation discontinued the 440R-S07139 on December 31, 2020. The listed functional replacement is the Guardmaster 440R-GL2S2P, but replacement is not necessarily a direct terminal-for-terminal substitution. Before upgrading, check the sensor arrangement, supply voltage, output requirements, reset logic, wiring diagram, and machine safety validation requirements. The replacement system should be tested and validated before the machine returns to normal operation.
Allen Bradley 440R-S07139 Guardmaster Safety Relays is in stock. Please contact us for a quick quote and competitive pricing.
| Company Information | ||||||||
| [email protected] | ||||||||
| Mobile | +8613666084105 | |||||||
| +8613666084105 | ||||||||
| 13666084105 | ||||||||
| Add to | Room 1004, No. 62 Xiangxiu Li, Siming District, Xiamen City, Fujian Province, China | |||||||
Company Introduction
Xiamen Shengruite Trading Co., Ltd. is a company specializing in the supply of industrial PLC spare parts.
We provide high-quality PLC spare parts to customers in the global manufacturing, energy and power, chemical and other fields.
Since its establishment in 2011, after 13 years of rapid development, the cumulative global shipments have reached 223,650 pieces, with an annual output value of US$50 million.
Successfully served more than 500 customers in more than 100 countries and regions including Saudi Arabia, UAE, the United States, Europe, Africa, and Southeast Asia
Our Mission
Provide customers with the best quality PLC spare parts and the fastest delivery service to ensure that their industrial automation systems are always in the best operating condition.
We provide a 1-year warranty service, and we support returns and exchanges for any issues to ensure your rights and interests are fully protected.
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The minimum order quantity (MOQ) is typically one unit. However, for larger orders, please contact us for potential discounts and pricing details.
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Returns are accepted within 30 days if the product is unused, unopened, and in its original packaging. Please note that return shipping and associated costs are the buyer\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\’s responsibility.
Yes, we offer technical support for the installation and integration of our products. Our team can assist with setup, configuration, and troubleshooting to ensure a smooth installation.
