Product Details
Product Description
Allen-Bradley Counter / Flowmeter Input Module – Model: 1746sc-CTR4 The 1746sc-CTR4 is a specialized input module for the Allen-Bradley SLC 500 series, designed to handle counter and flowmeter applications. It supports multiple input types including single-ended counters, quadrature encoding, and enable control lines. With high-speed counting capability, selectable filters, and precise accuracy, this module is ideal for industrial measurement and monitoring tasks.
Technical Specifications
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Manufacturer: Allen-Bradley (Rockwell Automation)
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Product Line: SLC 500
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Model: 1746sc-CTR4
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Type: Counter / Flowmeter Input Module
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Number of Inputs: 4 differential counter inputs
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Quadrature Encoding: 2 channels supported
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Enable Control Lines: 2 channels
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Input Voltage Ranges: AC (50 mV–75 V peak), DC (5 V, 12 V, 24 V)
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Input Frequency: Up to 50 kHz (AC and DC)
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Counter Speed: 0–50 kHz
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Maximum Count Value: ±32K or ±8M depending on mode
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Channel Update Time: 4 ms per channel
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Input Impedance: 25 kΩ
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Logic Levels: VIL ≤ 1.0 V, VIH ≥ 3.5 V, Vmax 75 V
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Backplane Current Draw: 225 mA @ 5 VDC
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Power Dissipation: 1.75 W max
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Filters: Digital filter (50 kHz default, 30 kHz option), Analog filter (15 kHz)
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Accuracy:
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Count mode: ±1 count
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Instantaneous rate: ±1% @ 50 kHz, ±0.001% @ 1 Hz
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Average rate: ±1 Hz
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Data Format:
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Counter mode: -8,388,608 to +8,388,607
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Rate mode: -32,768 to +32,767
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Fault Detection: Over-range and under-range status bits for all modes
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Slot Width: Single slot
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Weight: 0.38 lbs (0.17 kg)
Application Scenarios
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Flow measurement in industrial processes
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High-speed counting applications in automation systems
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Quadrature encoder feedback for motion control
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Machine-level monitoring requiring precise rate and count accuracy
FAQ
Q: How many counter inputs does the 1746sc-CTR4 provide? A: Four differential counter inputs.
Q: Does it support quadrature encoding? A: Yes, two channels of quadrature encoding are supported.
Q: What is the maximum input frequency? A: Up to 50 kHz for both AC and DC signals.
Q: What controllers are compatible? A: It is designed for the Allen-Bradley SLC 500 series.
Additional Information
- 100% Genuine Parts: All products are original and authentic, ensuring reliable industrial performance.
- 30-Day Refund Guarantee: Return any in-stock item within 30 days in original, unopened packaging for a full refund (excluding shipping and fees).
- 12-Month Warranty: Covers defects in materials or workmanship; excludes misuse, normal wear, or unauthorized modifications.
- Worldwide Shipping: We ship via USPS, UPS, FedEx, and DHL. Delivery times vary by country and may be subject to customs or import fees.
- Support & Contact: Technical and warranty assistance is available anytime. Contact us here: Contact.
- Purchase Guidance: Check product specifications and compatibility carefully before ordering to ensure proper application.
Tech & Buying Guide
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As control systems evolve across modern factory automation, understanding the root causes of these interruptions helps engineers minimize costly downtime. This technical guide breaks down why PLCs trip into Stop mode and provides practical strategies to mitigate system faults.
Understanding Root Causes of Unplanned PLC Stop Mode in Industrial Automation
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Human-Machine Interface Design: Essential Guide to HMI Selection, Visualization, and Control System Integration
Human-Machine Interfaces (HMIs) serve as the primary operational window into complex industrial automation systems. Modern HMIs convert raw machine data into clear graphical displays, enabling operators to oversee entire manufacturing processes in real time. Instead of relying on physical control panels full of hardwired switches, engineers program interactive screens using intuitive graphics, dynamic color coding, and responsive touch interfaces. Over my 15 years in control systems engineering, I have observed HMIs transform from basic display screens into sophisticated command centers that drive operational efficiency across DCS and PLC environments.