Automotive Industry
- IO Modules
- Protocol Converter
- PLC
- Industrial Switch
CT-1228 Digital Input Module 8DI 24VDC NPN
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Min. Cycle Time8 Channels
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ExpansionNPN
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Warranty24VDC
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ServiceCounter Frequency<200Hz
PRODUCT DESCRIPTION
Key Technical Features
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Wide Compatibility for Industrial Devices
Supports 8-channel 24VDC NPN (sink input, low-level active), compatible with PNP/NPN sensors, dry contacts, and active signal outputs, ensuring flexible field integration.
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Stable Performance with Opto-Isolation
Electrical isolation between field input and internal bus effectively reduces interference, enhancing system safety and long-term reliability.
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Accurate Signal Processing & Anti-Noise Design
Adjustable input filtering time and signal holding function improve signal stability and prevent false triggering in noisy environments.
Technical Specifications
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General Parameters |
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Power Consumption |
Max.33mA@5.0VDC |
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Isolation |
I/O to internal bus: opto-couple isolation (3KVrms) |
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Field Power |
Nominal:24VDC, Range: 19.2～28.8VDC |
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Wiring |
Max.: AWG 18 |
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Installation |
35mm DIN-Rail |
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Size |
115*14*75mm |
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Weight |
65g |
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Environment Specification |
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Operating Temperature |
-35℃~60℃ |
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Operating Temperature |
-35℃~70℃ |
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Relative Humidity |
5~ 95%RH (No Condensation) |
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Storage Temperature |
-40℃~85℃ |
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Storage Humidity |
5~ 95%RH (No Condensation) |
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Manufacturing Test |
-40℃~75℃ |
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Ingress Protection |
IP20 |
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Input Parameters |
|
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Channel Number |
8 channels input |
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LED Indicator |
8 channels input LED indicator |
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Turn-on Voltage |
Min.0VDC to Max. 14VDC |
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Turn-off Voltage |
Max. 19VDC |
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Turn-on Current |
Max.5mA/channel@28V |
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Input Impedance |
>7.5kΩ |
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Input Delay |
OFF to ON: Max.3ms |
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Filter Time |
Default 10ms |
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Sample Frequency |
500Hz |
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Counter Frequency |
<200Hz |
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Effective pulse width for |
2.5ms |
A:Low-level active, NPN input, 24VDC, supports counting up to 200Hz.
A:Internal power supply, no additional power needed.
Ideal for industries requiring high-speed, cost-effective distributed I/O:
