<h2>Overview</h2>
<p>The <strong>Eaton E51DP4 photoelectric sensor</strong> is a diffuse reflective photoelectric head engineered for limit switch-style modular sensing applications. Part of Eaton’s industry-proven E51 series, the E51DP4 delivers robust object detection across a 41-inch range, making it ideal for metal and non-metal detection in manufacturing, packaging, and material handling operations.</p>
<h2>Key Features</h2>
<ul>
<li>Diffuse reflective sensing mode for object detection without retroreflectors</li>
<li>Extended 41-inch detection range with 1.5″ spot size at 40 inches</li>
<li>Right-angle mounting head with 4-position orientation capability</li>
<li>Fast response time: 20 ms ON (AC/DC), 30 ms OFF (AC), 22 ms OFF (DC)</li>
<li>NEMA 3 environmental rating for indoor/outdoor use</li>
<li>Modular, plug-in design for quick maintenance and field replacement</li>
</ul>
<h2>Technical Specifications</h2>
<ul>
<li><strong>Part Number:</strong> E51DP4</li>
<li><strong>Manufacturer:</strong> Eaton (Cutler-Hammer Division)</li>
<li><strong>Series:</strong> E51 Limit Switch Style Photoelectric</li>
<li><strong>Sensing Type:</strong> Diffuse Reflective (Retroreflector not required)</li>
<li><strong>Detection Range:</strong> 41 inches maximum</li>
<li><strong>Spot Size:</strong> 1.5″ at 40 inches</li>
<li><strong>Response Time ON:</strong> 20 ms (AC/DC)</li>
<li><strong>Response Time OFF:</strong> 30 ms (AC), 22 ms (DC)</li>
<li><strong>Operating Temperature:</strong> -13°F to 158°F (-25°C to 70°C)</li>
<li><strong>NEMA Rating:</strong> 3, 3S, 4, 4X, 6, 6P, 12, 13</li>
<li><strong>Dimensions:</strong> 1.8″ H × 1.84″ L × 1.54″ W</li>
<li><strong>Weight:</strong> 0.40 lbs</li>
<li><strong>Mounting:</strong> Right angle, 4-position head</li>
<li><strong>Beam Type:</strong> Infrared</li>
</ul>
<h2>Typical Applications</h2>
<ul>
<li>Assembly line object detection and part counting</li>
<li>Packaging machinery and conveyor control</li>
<li>Material handling and inventory management systems</li>
<li>Warehouse and distribution center automation</li>
<li>Hazard area presence detection and safety interlocks</li>
<li>Manufacturing process automation with both metallic and non-metallic objects</li>
</ul>
<h2>Compatibility & Replacements</h2>
<h3>Compatible With</h3>
<ul>
<li>Eaton E51 Series photoelectric sensor bodies (20-264V AC/DC, 2-wire and 4-wire)</li>
<li>Cutler-Hammer motor control centers and electrical distribution systems</li>
<li>Standard industrial PLC and automation controller networks</li>
<li>Limit switch-style modular sensor ecosystems</li>
<li>Terminal, mini-connector, and cable connection interfaces</li>
</ul>
<h3>Replaces / Drop-In Replacement For</h3>
<ul>
<li>E51DP3 (35-foot variant; verify voltage and output ratings with your sensor body)</li>
<li>Comparable diffuse reflective photoelectric heads in the E51 product line</li>
<li>Verify with your system integrator before ordering as replacements depend on installed sensor body and control wiring.</li>
</ul>
<h3>Works With</h3>
<ul>
<li>E51 Series sensor bodies with 2-wire AC/DC or 4-wire AC/DC operation</li>
<li>Industrial automation platforms requiring diffuse reflective object detection</li>
<li>Standard electrical control networks and programmed logic controllers</li>
<li>Modular photoelectric sensor component stacks (head + body + connector combinations)</li>
</ul>
