<h2>Overview</h2>
<p>The <strong>Omega Engineering CN9111</strong> is a compact, microprocessor-based digital temperature controller from the CN9000A series. This 1/16 DIN-sized controller delivers precise temperature regulation for industrial automation and process control systems. With its dual mechanical relay outputs, flexible input options, and straightforward configuration, the CN9111 is widely used in manufacturing, test equipment, and climate control applications where reliable temperature management is critical.</p>
<h2>Key Features</h2>
<ul>
<li><strong>Dual Mechanical Relay Outputs:</strong> Output 1 rated for 5A max, Output 2 rated for 3A max, enabling simultaneous heating and cooling or dual independent setpoints</li>
<li><strong>Flexible Input Options:</strong> Accepts thermocouple, 2-wire RTD, or linear millivolt signals for temperature sensing</li>
<li><strong>3.5-Digit LED Display:</strong> Easy-to-read readout with Celsius/Fahrenheit switchable display</li>
<li><strong>Advanced PID Control:</strong> Features microprocessor-based PID (PDPI) control with approach control for smooth start-up and steady-state operation</li>
<li><strong>Autotune Capability:</strong> Automatic tuning simplifies commissioning and adapts to process changes</li>
<li><strong>Compact DIN Mounting:</strong> 1/16 DIN format for space-efficient panel integration</li>
</ul>
<h2>Technical Specifications</h2>
<ul>
<li><strong>Part Number:</strong> CN9111</li>
<li><strong>Series:</strong> CN9000A Microprocessor Controllers</li>
<li><strong>Supply Voltage:</strong> 115V ±15%, 50-60 Hz</li>
<li><strong>Display:</strong> 3.5-Digit LED, 0.1° resolution</li>
<li><strong>Input Type:</strong> Thermocouple, 2-Wire RTD, Linear Millivolt</li>
<li><strong>Output 1:</strong> 5A Mechanical Relay (120/240 VAC rated)</li>
<li><strong>Output 2:</strong> 3A Mechanical Relay (120/240 VAC rated)</li>
<li><strong>Temperature Range:</strong> 0.1° resolution up to 200° (selectable °C/°F)</li>
<li><strong>Control Functions:</strong> Dual setpoints, dual alarms, advanced diagnostics</li>
<li><strong>Form Factor:</strong> 1/16 DIN Panel Mount</li>
<li><strong>Weight:</strong> 0.90 lbs</li>
<li><strong>Status:</strong> Discontinued by Manufacturer</li>
</ul>
<h2>Typical Applications</h2>
<ul>
<li>Industrial ovens, furnaces, and thermal chambers</li>
<li>Laboratory and test equipment temperature regulation</li>
<li>Plastic injection molding barrel and mold temperature control</li>
<li>Water heating and cooling systems</li>
<li>Semiconductor processing and thermal testing</li>
<li>HVAC and climate control systems</li>
<li>Process automation requiring dual-stage heating and cooling</li>
</ul>
<h2>Compatibility & Replacements</h2>
<h3>Compatible With</h3>
<ul>
<li>Standard 115VAC electrical systems (50-60 Hz)</li>
<li>Type J, K, T, E thermocouple sensors</li>
<li>Platinum and nickel 2-wire RTD sensors</li>
<li>Industrial relay-based control systems</li>
<li>Standard mechanical contactors and solenoid loads</li>
<li>PLC input modules for monitoring setpoint and alarm status</li>
</ul>
<h3>Replaces / Drop-In Replacement For</h3>
<ul>
<li>Omega Engineering CN9111A (same function, later revision)</li>
<li>Other CN9000 series models with equivalent dual-relay configuration</li>
</ul>
<h3>Works With</h3>
<ul>
<li>Allen-Bradley PLC input modules (discrete I/O monitoring)</li>
<li>Siemens automation systems via relay contact inputs</li>
<li>Mitsubishi programmable controllers</li>
<li>Standard industrial control relay logic and hardwired circuits</li>
<li>Noise suppression kits (Omega part no. 1821-101 recommended for contactor/coil loads)</li>
</ul>
