Allen‑Bradley 801‑CMC144 Heavy‑Duty Fork‑Lever Maintained Limit Switch

The Allen‑Bradley 801‑CMC144 is a heavy‑duty maintained‑action limit switch from Rockwell 801 series, equipped with fork lever actuation mechanism. It adopts slow‑action maintained contact structure, which keeps contact state after mechanical triggering without automatic spring return, widely used for position detection and travel‑limit interlock on heavy‑industry mechanical equipment.

This unit features NEMA 4 / Type 14 rugged sealed housing, contact configuration of 1NO+3NC, and high operating torque up to 31.15 N. It is resistant to dust and splash‑water, suitable for harsh workshop environment. Widely used as aftermarket spare‑part for metallurgy, port‑machinery and heavy‑equipment control‑cabinet overhaul, travel‑loop debugging and system retrofitting projects.

Main Specifications

• Brand: Allen‑Bradley (Rockwell Automation); Model:801‑CMC144; Type:Fork‑Lever Maintained‑Action Limit Switch
• Actuation:Fork lever, slow‑action maintained (non‑spring return); operating torque 31.15 N (7.0 lbs)
• Contact:1 Normally Open, 3 Normally Closed (1NO+3NC); contact arrangement C type
• Enclosure:NEMA 4, Type 14 housing; dust‑proof and splash‑proof for industrial‑site installation
• Function:Mechanical position detection, travel‑limit interlock, equipment‑status signal output, safety‑interlock signal triggering
• Feature:Heavy‑duty mechanical‑structure, maintained‑latch function, robust metal housing, long mechanical service life
• Operating Environment:‑20℃ ~ +70℃, 5%‑95% RH non‑condensing
• Certifications: CE, NEMA compliant for heavy‑industry mechanical‑automation applications

Core Functions

• Detect mechanical‑equipment travel position via fork‑lever mechanical triggering, output discrete switch‑signal to PLC or relay‑control‑system.
• Maintained‑latch structure keeps contact status after actuation, requiring reverse mechanical reset to change switch‑state, for position‑locking monitoring scenarios.
• Multi‑contact combination of 1NO+3NC can simultaneously send signals to multiple control‑loops for interlock‑protection and status‑feedback.
• NEMA 4 sealed housing prevents dust, splash‑water and oil‑mist erosion, adapting to long‑term operation in heavy‑industry workshop conditions.
• High‑torque mechanical‑mechanism can withstand strong mechanical‑impact and vibration from large‑scale machinery‑equipment.
• Provide reliable hardware‑level travel‑limit and position‑interlock protection for cranes, material‑handling‑machinery and metallurgical‑production‑lines.

Application Scenarios

• Mechanical‑position‑sensing component for heavy‑duty industrial‑machinery control‑systems.
• Critical spare‑part for metallurgical‑plant, port‑crane, mining‑equipment and heavy‑machine‑tool control‑cabinet maintenance.
• Retrofit and spare replacement for legacy 801‑CMC144 limit‑switch mechanical‑control‑system upgrade projects.
• Equipment‑cabinet overhaul, travel‑signal‑loop debugging and faulty heavy‑duty‑limit‑switch replacement tasks.
• Spare‑parts inventory for heavy‑industry‑automation integrators and mechanical‑equipment‑engineering contractors.
• Global aftermarket spare supply for technical teams maintaining Allen‑Bradley 801‑series legacy switch hardware.