<h2>Overview</h2>
<p>The <strong>Allen-Bradley 1734-VHSC24</strong> is a specialized very high-speed counter module within the Point I/O distributed I/O family. Operating at 24 VDC with a maximum input frequency of <strong>1 MHz</strong>, this module serves as both a signal conditioner and function block, processing high-speed counter signals and passing them to the POINTBus backplane for controller processing. It is designed for applications requiring precise pulse, frequency, and position monitoring in demanding industrial environments.</p>
<h2>Key Features</h2>
<ul>
<li>1 MHz maximum input frequency for high-speed counting and encoder feedback</li>
<li>Dual isolated source outputs rated 0.5 A at 24 VDC for safe signal switching</li>
<li>Configurable input filtering (OFF, 10 μs, 100 μs, 1 ms, 10 ms) to eliminate noise and ensure accurate counting</li>
<li>24-bit counting range (0 – 16,777,215) stored internally in a 32-bit register with configurable presets and rollover settings</li>
<li>DIN rail/G-rail combination mounting for flexible installation</li>
<li>One group of A/Aret, B/Bret, Z/Zret inputs for quadrature and zero reference signals</li>
</ul>
<h2>Technical Specifications</h2>
<ul>
<li><strong>Input Voltage:</strong> 24 VDC (6.1 mA @ 15 VDC, 10.2 mA @ 24 VDC)</li>
<li><strong>Maximum Input Frequency:</strong> 1 MHz</li>
<li><strong>Output Rating:</strong> 0.5 A per isolated output at 24 VDC</li>
<li><strong>Number of Outputs:</strong> 2 isolated source outputs</li>
<li><strong>Counting Range:</strong> 24-bit (0 – 16,777,215)</li>
<li><strong>Input Filtering Options:</strong> OFF, 10 μs, 100 μs, 1 ms, 10 ms</li>
<li><strong>Mounting:</strong> DIN Rail / G-Rail Combination</li>
<li><strong>Weight:</strong> 0.13 lb</li>
<li><strong>Certifications:</strong> UL, CE, CUL, C-TICK, GOST, KC, MARINE, Registro Italiano Navale, IECEx, UKCA</li>
<li><strong>Terminal Base:</strong> TB/TBS (screw or spring clamp available)</li>
</ul>
<h2>Typical Applications</h2>
<ul>
<li>High-resolution encoder feedback for servo and stepper motor systems</li>
<li>Turbine meters and flow sensor pulse counting</li>
<li>Mechanical switch and limit signal monitoring</li>
<li>Precision rate measurement and frequency monitoring</li>
<li>Motion control systems requiring real-time counter operation</li>
<li>Industrial weighing, packaging, and material handling equipment</li>
</ul>
<h2>Compatibility & Replacements</h2>
<h3>Compatible With</h3>
<ul>
<li>Point I/O distributed I/O systems (1734 series)</li>
<li>Allen-Bradley CompactLogix and ControlLogix controllers</li>
<li>EtherNet/IP networks</li>
<li>Studio 5000 Logix Designer software</li>
<li>POINTBus backplane interface</li>
</ul>
<h3>Replaces / Drop-In Replacement For</h3>
<p>Verify compatibility with your system integrator before ordering. The 1734-VHSC24 is the current Series C release; superseded earlier revisions of the VHSC counter module.</p>
<h3>Works With</h3>
<ul>
<li>Studio 5000 Logix Designer and Add-On Profiles (AOP v40.14.77 and later)</li>
<li>EDS files for device configuration and integration</li>
<li>EtherNet/IP protocol stack</li>
<li>Point I/O specialty modules and network configurations</li>
</ul>
