<h2>Overview</h2>
<p>The <strong>Allen-Bradley 1791D-16B0X</strong> is a CompactBlock I/O expansion module designed for DeviceNet-based distributed I/O architectures. As an expansion unit, it connects to a 1791D base module to add 16 additional sinking input points, enabling scalable, compact field I/O networks in confined enclosures and near sensors and actuators.</p>
<h2>Key Features</h2>
<ul>
<li><strong>16 Sinking Input Points:</strong> <cite index=”1-4″>Sixteen 24 VDC discrete inputs supporting sinking configuration in two groups of eight inputs each</cite></li>
<li><strong>Expansion-Capable:</strong> <cite index=”1-26″>CompactBlock I/O expansion modules can be added to base modules to expand I/O assembly up to 32 points</cite></li>
<li><strong>DeviceNet Ready:</strong> <cite index=”1-5″>Module supports DeviceNet communication with integrated power supply</cite></li>
<li><strong>LED Status Indicators:</strong> <cite index=”1-19″>Built-in bi-color Mod/Net LED and Logic/I/O status LEDs for diagnostics</cite></li>
<li><strong>Compact Footprint:<strong> <cite index=”1-35″>Dimensions of 4.4 x 1.9 x 1.5 inches with weight of approximately 0.1 kilograms</cite></li>
</ul>
<h2>Technical Specifications</h2>
<ul>
<li><strong>Input Voltage:</strong> <cite index=”1-17″>0–30 VDC; On-state: 10–30 VDC (40°C) / 24 VDC (60°C)</cite></li>
<li><strong>On-State Current:</strong> <cite index=”1-18″>2 mA @ 10 VDC minimum; 11 mA @ 30 VDC maximum</cite></li>
<li><strong>Off-State Current:</strong> <cite index=”1-1″>1.5 mA @ 5 VDC</cite></li>
<li><strong>Power Supply (5V Expansion):</strong> <cite index=”1-24″>5 VDC @ 100 mA</cite></li>
<li><strong>Data Output:</strong> <cite index=”1-23″>3 bytes for 16 inputs</cite></li>
<li><strong>Input Configuration:</strong> Sinking (2 groups of 8 inputs)</li>
<li><strong>Communication:</strong> DeviceNet</li>
<li><strong>Operating Temperature:</strong> <cite index=”1-25″>0–60°C</cite></li>
<li><strong>Enclosure Type:</strong> <cite index=”1-2″>IEC IP20</cite></li>
<li><strong>Isolation Rating:</strong> <cite index=”1-28″>500 VAC I/O to DeviceNet</cite></li>
<li><strong>Terminal Connection:</strong> <cite index=”1-28″>14 AWG stranded</cite></li>
<li><strong>Humidity:</strong> <cite index=”1-36″>5–95% relative humidity without condensing</cite></li>
<li><strong>Certifications:</strong> <cite index=”1-37″>CE marked</cite></li>
</ul>
<h2>Typical Applications</h2>
<ul>
<li><strong>Manufacturing Systems:</strong> Assembly lines, packaging machines, and robotics requiring distributed field sensing</li>
<li><strong>Process Control:</strong> Sensor and actuator interfacing in food, beverage, pharmaceutical, and chemical facilities</li>
<li><strong>Machine Automation:</strong> Local I/O modules near production equipment in space-limited cabinets</li>
<li><strong>Building and Infrastructure:</strong> HVAC, lighting control, and facility monitoring systems</li>
</ul>
<h2>Compatibility & Replacements</h2>
<h3>Compatible With</h3>
<ul>
<li><cite index=”1-6″>PLC, SLC, or SoftLogix programmable controllers using DeviceNet scanners</cite></li>
<li>1791D base modules (1791D-16B0, 1791D-4B0, 1791D-8B8P, and equivalent base units)</li>
<li>Rockwell Automation CompactBlock I/O family systems</li>
<li>DeviceNet networks with supported master controllers</li>
</ul>
<h3>Replaces / Drop-In Replacement For</h3>
<ul>
<li><cite index=”8-1″>1791D-16B0X (exact match—16 sinking input expansion module)</cite></li>
</ul>
<h3>Works With</h3>
<ul>
<li>DeviceNet communication protocol</li>
<li>Rockwell Automation Studio 5000 Logix Designer</li>
<li>RSLogix 500 (for SLC and PLC-5 controllers)</li>
<li>EDS files and DeviceNet scanner configuration tools</li>
<li><cite index=”6-18,6-19″>DeviceLogix Smart Component Technology for local control functions</cite></li>
</ul>
