<h2>Overview</h2>
<p>The <strong>Turck RKE57-TR2</strong> is a bus terminating resistor designed for DeviceNet™ and CANopen fieldbus systems. This M12 × 1 female connector–equipped unit provides the 120Ω termination required at the start and end of a DeviceNet main trunk line to stabilize bus voltage and minimize signal reflections. With rugged stainless-steel housing and IP68/IP69K sealing, it delivers reliable performance in harsh industrial environments.</p>
<h2>Key Features</h2>
<ul>
<li>M12 × 1 female connector, 5-pin configuration for DeviceNet/CANopen compatibility</li>
<li>120Ω ± 5% internal resistor, 1/2 W power rating</li>
<li>Rated voltage: 10–30 VDC (max. 7.6 VDC across resistor pins)</li>
<li>Operating temperature: −40 °C to +80 °C for extended industrial range</li>
<li>IP68/IP69K protection and NEMA 1/3/4/6P enclosure ratings</li>
<li>Nickel-plated brass coupling nut for corrosion resistance</li>
</ul>
<h2>Technical Specifications</h2>
<ul>
<li><strong>Connector Type:</strong> M12 × 1 female, 5-pin</li>
<li><strong>Internal Resistance:</strong> 120Ω ± 5%, 1/2 W</li>
<li><strong>Rated Voltage:</strong> 10–30 VDC</li>
<li><strong>Maximum Pin Voltage:</strong> 7.6 VDC</li>
<li><strong>Temperature Range:</strong> −40 °C to +80 °C (ambient)</li>
<li><strong>IP Rating:</strong> IP68, IP69K</li>
<li><strong>NEMA Classification:</strong> NEMA 1, 3, 4, 6P</li>
<li><strong>Housing Material:</strong> Nickel-plated brass or stainless steel</li>
<li><strong>Identification Number (Turck):</strong> U2251-5</li>
</ul>
<h2>Typical Applications</h2>
<p>The RKE57-TR2 terminating resistor is essential for:</p>
<ul>
<li>DeviceNet main trunk line termination at network start and end points</li>
<li>CANopen fieldbus networks requiring signal stabilization</li>
<li>Industrial automation plants, food and beverage processing, and packaging machinery</li>
<li>PLC-based control systems with distributed I/O modules and sensor networks</li>
<li>Wet, corrosive, or high-temperature manufacturing environments</li>
</ul>
<h2>Compatibility & Replacements</h2>
<h3>Compatible With</h3>
<ul>
<li>DeviceNet™ networks (per ODVA DeviceNet specification)</li>
<li>CANopen fieldbus systems</li>
<li>Allen-Bradley CompactLogix and ControlLogix processors with DeviceNet modules</li>
<li>Rockwell Automation EtherNet/IP gateways and DeviceNet scanners</li>
<li>Third-party DeviceNet-compliant PLCs and industrial controllers</li>
<li>M12 A-code 5-pin female receptacles</li>
</ul>
<h3>Replaces / Drop-In Replacement For</h3>
<ul>
<li>RKE 57-TR2 (all revisions)</li>
<li>RKE57-TR2 (alternative part notation)</li>
</ul>
<h3>Works With</h3>
<ul>
<li>DeviceNet communication protocol and CAN layer</li>
<li>Turck connectivity systems and M12 connector ecosystems</li>
<li>PROFIBUS, EtherCAT, and other industrial fieldbus networks (via compatible gateways)</li>
<li>Studio 5000 and other Rockwell PLCs configured with DeviceNet scanner modules</li>
</ul>
