Eaton EMPS0491 Selector Switch - Hazardous Locations
Part Number: EMPS0491
Quick Summary
EMPS0491 selector switch operator provides reliable, key-operated control for hazardous-area machinery and equipment in industrial automation. Many users struggle with unauthorized access, accidental starts, and regulatory compliance in hazardous locations. This operator is NEC/CEC compliant and rated for Class I, Division 1 and 2, Class II, Division 1 and 2, and Class III, with NEMA ratings 3, 7, and 9. Compact, easy to install, and designed for harsh environments, it helps reduce downtime and maintenance costs while delivering durable performance in demanding industrial settings. For engineers and procurement teams, the EMPS0491 offers a predictable, compliant interface that improves safety and reliability across mission-critical applications.
Product Information
Extended Description
EMPS0491 Eaton Crouse-Hinds: Eaton Crouse-Hinds series EMPS selector switch operator, Short, Two-position selector switch, key operated, Key removal both positions, One contact block
Product Name
Eaton Crouse-Hinds series EMPS selector switch operator
Catalog Number
EMPS0491
Product Length/Depth
5.56 in
Product Height
2.63 in
Product Width
2.63 in
Product Weight
0.7 lb
UPC
782274033044
Area classification
Hazardous/Classified Locations
Standards type
NEC/CEC
NEC hazardous rating
Class I, Division 1 Class I, Division 2 Class II, Division 1 Class II, Division 2 Class III
NEMA Rating
3 7 9
Operator style
Two-position selector switch, key operated
Assembly style
Short
Special features
One contact block
Type
Key removal both positions
EMP and EMPS Hazardous Area Operators catalog page
IF 1702 - EMP/EMPS Barrel Assemblies - ATEX and IEC version
IF 1702 - EMP/EMPS Barrel Assemblies - ATEX and IEC version
Eaton Specification Sheet - EMPS0491
Feature: Key-operated, two-position selector switch with key removal in both positions. Business Impact: Improves access control and prevents unintended machine starts, reducing safety incidents and regulatory exposure on hazardous-area equipment. Application: Start/stop control in chemical plants, oil and gas facilities, and mining operations. Feature: Short assembly design with a compact 5.56 in depth and 2.63 in by 2.63 in footprint. Business Impact: Eases panel integration, lowers cabinet space needs, and speeds installation for retrofit projects. Application: Retrofit into existing EMPS barrel assemblies and control panels in hazardous zones. Feature: One contact block and simple wiring. Business Impact: Reduces wiring complexity, lowers assembly time, and increases circuit reliability for critical controls. Application: Simple stop/start circuits in hazardous locations where minimal contact points are preferred. Feature: NEC/CEC compliance with Class I, Division 1 & 2; Class II, Division 1 & 2; Class III; and NEMA 3, 7, 9 ratings. Business Impact: Supports rigorous regulatory compliance and durable performance in harsh environments, mitigating risk of non-conformance. Application: Equipment control on offshore platforms, chemical reactors, and rugged manufacturing floors. Feature: Availability of installation resources including catalog pages and datasheets. Business Impact: Accelerates procurement decisions and ensures correct integration with EMP/EMPS barrel assemblies. Application: Engineer-led specification and commissioning workflows in hazardous-area projects. Insight: The EMPS0491 design focuses on minimizing touchpoints and failure modes in safety-critical interfaces, aligning with industry Best Practices for reliability, maintenance planning, and lifecycle cost reduction.
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FAQs
EMPS0491 uses the Short assembly style and is designed for compatibility with Crouse-Hinds EMP/EMPS barrel assemblies. For installation, reference IF1702 ATEX/IEC version instructions to ensure correct mounting, wiring, and knock-out alignment on hazardous-location panels.
EMPS0491 is rated for Class I, Division 1 & 2 and Class II, Division 1 & 2, plus Class III, under NEC/CEC. It carries NEMA ratings 3, 7, 9, and is built for hazardous/classified locations, providing safe operation in demanding environments.
Industries such as oil and gas, chemical processing, mining, and marine/offshore applications benefit most. The key-removal feature and hazardous-location ratings help protect operators and ensure compliant, controlled start/stop of equipment in harsh environments.
EMPS0491 is NEC/CEC compliant with hazardous-location ratings and supported by installation sheets (IF 1702 ATEX/IEC version) and a dedicated specification sheet. The catalog page also provides product context for proper selection, wiring, and safety compliance.
The key-removal feature prevents unauthorized operation, reducing downtime and misoperation costs. The compact design, robust construction, and standardized installation resources shorten maintenance cycles, improve safety, and lower total cost of ownership in hazardous-area facilities.