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CT-1218 Digital Input 8DI 24VDC PNP

A reliable, compact 8-channel digital input module designed for 24VDC PNP signals, featuring built-in 32-bit counters and robust opto-isolation for versatile industrial data acquisition.

    • Min. Cycle Time
      8 Channels
    • Expansion
      PNP
    • Warranty
      24VDC
    • Service
      Counter Frequency<200Hz

    PRODUCT DESCRIPTION

    Maximum I/O Density for the ODOT C-Series System
    This 8-channel digital input module is designed for 24VDC sink (PNP) applications, triggering on high-level signals. It seamlessly connects to 2-wire/3-wire sensors and dry contacts, ensuring safety via robust opto-isolation. It features 8 LED indicators, configurable signal filtering, and adjustable holding times.

    Beyond standard inputs, activating its sub-module transforms each channel into an independent 32-bit counter (up to 200Hz). With fully customizable counting modes, directions, and byte sequences, it provides a highly flexible solution for reliable data acquisition and low-frequency pulse monitoring.

    Key Technical Features

    • 793a0eed-e7fd-4cec-aed4-8a7c7fe1935d

      Flexible Multi-Channel Input Support

      8-channel 24VDC digital input supports sink/PNP sensors, dry contact or active signals, and 2-/3-wire sensors, ensuring broad compatibility with field devices.

    • abe40f07-4608-4e6f-a439-8cdac43443d5

      High Reliability with Isolation and Signal Control

      Opto-isolated inputs, configurable signal filtering, and adjustable holding time enhance noise immunity, signal stability, and system reliability.

    • 0841450c-88dd-4af9-ae75-61adb10a1291

      Advanced Counting and Configuration Capability

      Each channel features independent 32-bit counters (<200Hz), configurable modes, directions, and transmission order, enabling precise counting and flexible industrial applications.

    Technical Specifications

    General Parameters

    Power Consumption

    Max.33mA@5.0VDC

    Isolation

    I/O to internal bus: opto-couple isolation (3KVrms)

    Field Power

    Nominal:24VDC, Range: 19.2~28.8VDC

    Wiring

    Max.: AWG 18
    Min.: AWG 24

    Installation

    35mm DIN-Rail

    Size

    115*14*75mm

    Weight

    65g

    Environment Specification

    Operating Temperature of
    Vertical Installation

    -35℃~60℃

    Operating Temperature of
    Horizontal Installation

    -35℃~70℃

    Relative Humidity

    5~ 95%RH (No Condensation)

    Storage Temperature

    -40℃~85℃

    Storage Humidity

    5~ 95%RH (No Condensation)

    Manufacturing Test
    Temperature

    -40℃~75℃

    Ingress Protection Rating

    IP20

    Input Parameters

    Channel Number

    8 channel sink input

    LED Indicator

    8 channel input LED indicator

    Turn-on voltage

    Min. 10VDC to Max.28VDC

    Turn-off Voltage

    Max.5VDC

    Turn-on current

    Max. 5mA/channel@28V

    Input impedance

    >7.5kΩ

    Input delay

    OFF to ON: Max.3ms
    ON to OFF: Max.2ms

    Filter time

    Default 10ms

    Sample frequency

    500Hz

    Counter frequency

    <200Hz

    Effective pulse width for counting

    2.5ms

    PRODUCTS FAQ

    needs
    9623b2b9-15e5-4a0a-a03f-9a50f54e0200
    Q:What voltage and type does CT-1218 support?

    A:24VDC, high-level active, PNP input, supports counting function up to 200Hz.

    fca08b09-f435-4767-b405-388d9ef8ffbc
    Q:What applications is CT-1218 suitable for?

    A:Suitable for mechanical switch signal acquisition, counting, and high-speed pulse input.

    Industry Applications


    Ideal for industries requiring high-speed, cost-effective distributed I/O:
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    Why Choose ODOT?

    We understand the challenges system integrators and engineers face today. The CN-8032 is not just a hardware component; it is a solution designed to optimize your business efficiency.


    Global Technical Support
    Fast & Reliable Delivery
    If you are facing: Global supply chain disruptions causing long lead times (6-12 months) for critical automation parts.

    Our Solution: We maintain a robust supply chain and ample stock levels. ODOT guarantees rapid delivery (Most products can be shipped within 1-3 working days,typically shipping within 1-2 weeks for standard orders), ensuring your project stays on schedule and machine downtime is minimized.
    24/7 Global Technical Support
    If you are facing: Lack of timely support during commissioning, leading to project delays.

    Our Solution: We provide 24-hour technical support. Our team of dedicated application engineers is available around the clock to assist with GSDML file configuration, PLC integration (Siemens S7-1200/1500, etc.), and troubleshooting, ensuring a smooth setup process regardless of your time zone.
    Certifications & Quality Assurance:
    ODOT products comply with international industrial standards, including CE,UL, RoHS, CL and CCS certifications, having undergone rigorous quality control to ensure long-term reliable operation in industrial environments.
    environments
    ODOT In Hannover Messe
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    Professional Team
    Professional Team

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