SR469-P5-HI-A20-E Product Overview
The GE SR469-P5-HI-A20-E is a Rockwell Automation overload relay designed specifically for industrial motors.Part of its motor protection series,it acts like a”bodyguard”for motors in industrial automation systems,safeguarding their safe operation at all times.Whether it’s a conveyor belt motor,a water pump motor,or a machine tool spindle motor in the workshop,the SR469-P5-HI-A20-E monitors current changes in real time during operation.
For example,if a motor’s current surges due to excessive load or a mechanical jam occurs,the SR469-P5-HI-A20-E instantly detects the anomaly and quickly triggers a trip to cut off power to the motor.Considering that a motor burnout can cost hundreds to tens of thousands of yuan to repair,and require production downtime,this relay can save factories significant money.It also accommodates a current range of 0.4-20A,making it suitable for motors ranging from micro pumps to medium-sized conveyor motors,eliminating the need for frequent model changes and offering maximum compatibility.
Main Features and Advantages
Precise protection,no false positives or missed detections:The SR469-P5-HI-A20-E utilizes Rockwell’s patented current sensing chip,accurately detecting subtle changes in motor current,even a 0.1A fluctuation.Unlike some inexpensive relays,which either trip at slightly higher currents,delaying production,or fail to respond to excessive currents,potentially damaging the motor.The SR469-P5-HI-A20-E can also distinguish between”normal overloads”and”fault overloads.”For example,it intelligently identifies short bursts of high current during motor startup without tripping,but provides immediate protection against sustained overloads.This is a particularly convenient feature.Wide adaptability and strong compatibility eliminate the need for factories to stockpile supplies:This relay’s current range is adjustable from 0.4A to 20A.Whether it’s a small 0.75kW water pump motor or a 5.5kW conveyor motor in the workshop,a single SR469-P5-HI-A20-E can handle it all.This eliminates the need to stockpile a different relay model for each motor,significantly reducing inventory pressure.Furthermore,it seamlessly integrates with Rockwell PLCs(such as ControlLogix and CompactLogix)and is also compatible with other brands’motor control systems.Wiring is simple,requiring no additional circuit modifications,and an electrician can install several units in just half a day.Durable and built to withstand harsh environments:Factory workshops are complex environments,characterized by hot summers and cold winters,and are subject to electromagnetic interference(EMI)generated by inverters and motors.However,the SR469-P5-HI-A20-E can withstand temperatures ranging from-25°C to+70°C,and even operates stably at workshop temperatures reaching 40°C.Its flame-retardant housing prevents even the slightest spark from igniting the relay.Its internal circuitry is also resistant to interference,so high-frequency interference from inverters has no impact on its detection accuracy,making it reliable for use in locations like automotive welding workshops and chemical pump rooms.
Intelligent communication facilitates remote monitoring:The SR469-P5-HI-A20-E supports DeviceNet and EtherNet/IP communication(requires a small communication module).The factory control room can view the status of each relay in real time—clearly identifying which motor is running,how much current it is drawing,and whether any alarms are present.If a motor malfunctions and trips,the central control room receives a signal immediately,eliminating the need for technicians to search the entire workshop for the problem,doubling maintenance efficiency.Furthermore,protection parameters can be set remotely through software,eliminating the need to remove the module or adjust the code,making it extremely convenient.
The Allen-Bradley SR469-P5-HI-A20-E stands out as a premium overload relay engineered for industrial motor protection,delivering unmatched precision and reliability in critical manufacturing environments.Its advanced current-sensing technology,with a detection range of 0.4-20A,enables accurate monitoring of motor current fluctuations,distinguishing between harmless startup surges and hazardous overloads to avoid unnecessary downtime or costly motor damage.
Equipped with multi-layer protection—including overload,locked-rotor,phase-loss,and overheating safeguards—it responds in as little as 0.5 seconds to locked-rotor faults,a critical feature for preventing irreversible motor burnout.Its wide voltage compatibility(100-240V AC)and robust operating temperature range(-25°C to+70°C)make it suitable for harsh industrial settings,from humid pump rooms to high-temperature welding workshops.
With optional DeviceNet/EtherNet/IP connectivity,the The SR469-P5-HI-A20-E seamlessly integrates into smart factory ecosystems,enabling remote monitoring,parameter adjustment,and fault diagnostics from a central control room.This not only reduces maintenance labor but also enhances overall system visibility,making it an indispensable component for modern industrial motor protection.
Applications
In automotive parts factories,the SR469-P5-HI-A20-E is the guardian angel of conveyor motors.Conveyor motors in car seat assembly lines run continuously for 16 hours a day.If a motor stalls due to a stuck component,the current can instantly surge to over three times the rated value.Without protection,the motor can burn out in minutes.With the SR469-P5-HI-A20-E,the motor trips instantly upon stalling.A technician can then clear the stuck component and reset the relay to restart the system,eliminating the need to replace the motor.This single feature saves factories tens of thousands of yuan in maintenance costs annually.
Pump rooms in the chemical industry also rely on the SR469-P5-HI-A20-E.The motors in chemical pump rooms pump corrosive liquids.If impellers become lodged,the motors will overload.Furthermore,the high humidity and strong electromagnetic interference in the pump room make ordinary relays prone to malfunctioning.However,the SR469-P5-HI-A20-E has strong anti-interference capabilities and can accurately identify overload faults.Its phase loss protection function also prevents single-phase operation caused by aging circuits.Remember,if a motor runs with a single phase for 10 minutes,the windings will burn out.This relay eliminates this risk before it occurs.
The mixing motors in food processing plants also rely on the SR469-P5-HI-A20-E for protection.When mixing food,if the ingredients clump and increase the mixing resistance,the motor current will gradually increase,causing a”soft overload.”Some relays react slowly,and by the time they trip,the motor has already overheated.However,the SR469-P5-HI-A20-E tracks current trends in real time.As long as the current continues to exceed the set value,it will gradually issue warnings and eventually trip.This protects the motor while preventing production interruptions caused by momentary fluctuations.It is particularly suitable for industries like food processing,where production cannot be interrupted at will.
Selection Guide/Purchasing Recommendations
When choosing the SR469-P5-HI-A20-E,first consider the motor’s rated current.It ranges from 0.4-20A,corresponding to a motor power of approximately 0.2-5.5kW(380V motor).If your motor current exceeds 20A,you should choose its larger sibling,the SR469-P5-HI-A60-E(0.4-60A).If the current is less than 0.4A,choose the SR469-P5-HI-A01-E(0.1-1A).Don’t buy the wrong model,which could result in ineffective protection.Next,consider the on-site power supply.The SR469-P5-HI-A20-E requires 100-240V AC.If your site uses 24V DC,you’ll need an additional AC/DC power module,otherwise the relay won’t function.There’s also the communication requirement.If you want remote monitoring from a central control room,you’ll need to purchase a corresponding communication module(such as the 1794-ADN DeviceNet module).Otherwise,you’ll only be able to view the status locally.
Finally,a reminder:always buy genuine Rockwell products.Don’t buy refurbished parts.This relay is the lifeline of the motor.Refurbished parts may have inaccurate detection,leading to false trips or failure to trip,which could lead to a burnout of the motor.Shenzhen Changxin[www.cnplcdcs.com]is authorized by the manufacturer,and the serial number of each SR469-P5-HI-A20-E can be checked,ensuring reliability.Frequently Asked Questions(FAQs)
Q:Can the SR469-P5-HI-A20-E connect to a DC motor?
A:No!The SR469-P5-HI-A20-E is designed specifically for AC motors and detects AC current.DC motors have different current characteristics,so connecting one will either result in no protection or a false trip.For DC motors,choose a Rockwell DC motor protection relay,such as the SR489 series.
Q:How do I reset the SR469-P5-HI-A20-E after it trips?
A:There are two reset methods:local reset:simply press the red”RESET”button on the relay;and remote reset:if connected to a PLC,a reset command can be sent from the PLC,eliminating the need for a technician to visit the site.However,before resetting,be sure to first troubleshoot the motor,such as whether it’s overloaded or stalled.Otherwise,the motor may trip again after resetting,wasting your time.
Q:Can this relay be used with a Siemens PLC?
A:Yes!The SR469-P5-HI-A20-E has a dry contact output(passive contacts).It can connect to Siemens,Schneider,or other PLCs,as long as the PLC input is 24V DC or 220V AC,without protocol modification.For communication,a universal communication gateway can also be used with Siemens PLCs’Profinet networks.
Q:Can the SR469-P5-HI-A20-E be used on outdoor motors?
A:The module itself is IP20 rated and cannot be placed directly outdoors!If used outdoors,it must be installed in an IP65 protective enclosure,with the relay mounted inside and the wiring routed through a waterproof connector.Otherwise,rain and dust can short-circuit the relay and burn it out.Furthermore,the outdoor temperature should not drop below-25°C,otherwise the relay will freeze and stop functioning.
Customer Case Study/Successful Application Analysis
A factory producing automotive wheel hubs previously had 10 conveyor motors in its workshop.Every month,one or two would burn out due to overload,costing over 2,000 yuan and requiring a significant downtime.They then installed the SR469-P5-HI-A20-E on each motor.In the first month,three relays tripped.Investigation revealed that the excessive load caused by worn conveyor bearings led to increased load.A technician promptly replaced the bearings,and the motors did not burn out.
After nearly two years of use,the factory has not had a motor burn out,saving over 40,000 yuan in repair costs.Furthermore,the SR469-P5-HI-A20-E is connected to the central control room via a communication module.This provides early warning of any motor current draw problems,allowing maintenance personnel to perform maintenance during production breaks,eliminating the need to wait for trips and downtime.This has resulted in a 5%increase in production efficiency.The factory manager later told me,”This relay may look small,but it really saved us a lot of money!”
Related Products
Allen-Bradley SR469-P5-HI-A60-E:An upgraded version of the SR469-P5-HI-A20-E,with a rated current range of 0.4-60A,suitable for medium-and high-power motors from 5.5-15kW.It offers the same protection functions and communication compatibility,but with a wider current coverage.
Allen-Bradley 1794-ADN:A DeviceNet communication module.When used with the SR469-P5-HI-A20-E,it connects the relay to a DeviceNet network,enabling remote monitoring and parameter setting.It is ideal for distributed motor control in factories.
Allen-Bradley ControlLogix L71:A Rockwell PLC that seamlessly integrates with the SR469-P5-HI-A20-E,receiving fault signals from the relay and simultaneously issuing commands to start and stop the motor,forming a complete motor control system.
Allen-Bradley 140M-C-AFA:Overload relay protective enclosure,IP65 rated,allows the SR469-P5-HI-A20-E to be installed outdoors or in dusty workshops,preventing damage to the module from dust and water splashes.
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