E51 NEMA limit switch photoelectric sensors

Sensors and limit switches

Tough-built sensors

Eaton's E51 limit-switch-style modular sensors are available in thru-beam, reflex, polarised reflex, diffuse reflective and fibre-optic sensing modes to solve a wide variety of sensing applications. Modular, plug-in components are easy to maintain, meaning less downtime and reduced inventory. Choose between 2-wire sensors with AC/DC operation and 4-wire sensors in either AC or DC styles. Connection options include terminal, mini-connector and various lengths of cable. Sensors can be ordered in component form or as fully assembled units.

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Overview Configure Resources

Core features of the E51 NEMA limit switch photoelectric sensors

Choose from five different sensing modes, including fibre optic
All heads feature a selector switch for light or dark operation
Logic modules are available to provide additional control functions
Rugged construction, ideal for industrial environments
Viton gaskets ensure a positive seal and high chemical resistance

Sensor heads can be rotated to any of four positions
Components are interchangeable with E51 proximity sensors
Sensors accommodate both US and DIN mounting dimensions
Sensor bodies feature bifurcated engagement prongs for a reliable electrical connection when plugging into receptacle stabs

Test the best!

Not sure if Eaton sensor and limit switch solutions are right for you? You can request samples of Eaton sensors FREE OF CHARGE to test them with your machine applications. We make our Eaton experts available to assist with product selection and provide technical guidance so that you can choose the right sensor for your needs.

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Specifications

Product selection guide

E51 limit-switch-style modular sensors

Sensing types and ranges

Thru-beam: 91 m (300 ft)
Reflex: 5.4 and 10.6 m (18 and 35 ft)
Polarised reflex: 4.5 m (15 ft)
Diffuse reflective: 20, 46 and 102 cm (8, 18 and 40 in)
Glass fibre optic: range varies with fibre

Product features

Modular construction consisting of a head, sensor body and receptacle
Most E51 photoelectric and inductive heads are interchangeable on all E51 sensor bodies for substantial inventory reduction
Same general configurations and dimensions as the E50 limit switch
Order as complete assemblies or components for stocking and manufacturing flexibility
Keyed for directional head positioning

Technical data and specifications

Operating voltage – 20–264 Vac/dc; 120 Vac; 10–30 Vdc
Output function – NO or NC (programmable) or NO and NC (complementary) sensor bodies are available
Maximum load current – AC – 1.0A continuous, DC – 0.6A continuous
Enclosure ratings – NEMA 3, 3S, 4, 4X, 6, 6P and 13 Class I, II, III, Division 2, Groups A, B, C, D, F and G (conduit entry only)
Response time range – 1 ms to 30 ms

Approvals

UL Listed, E166051, E183975
CSA certified, 50513

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