Automotive Industry
- IO Modules
- Protocol Converter
- PLC
- Industrial Switch
CT-121F Digital Input Module16DI 24VDC Sink Type
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Min. Cycle Time16 Channels
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ExpansionPNP
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Warranty24VDC
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ServiceCounter Frequency<200Hz
PRODUCT DESCRIPTION
Key Technical Features
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Optimized for PNP Sensors (Sink Type)
Operating as a sink-type module, it requires a high-level voltage (10~28VDC) to register an ON state. This perfectly matches standard PNP (sourcing) sensors and active output field equipment globally, eliminating wiring confusion.
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Built-in 32-Bit Counters (<200Hz)
It's more than just a discrete input module. Each of the 16 channels can be configured with an independent 32-bit counter to track low-frequency pulses (up to 200Hz).
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Robust Optical Isolation
Features industrial-grade optocoupler isolation (3KVrms) between the field input signals and the internal backplane bus, safeguarding your control core from electrical noise and unexpected voltage surges.
Technical Specifications
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General Parameters |
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Power Consumption |
Max.63mA@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 of |
-35℃~60℃ |
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Operating Temperature of |
-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 Rating |
IP20 |
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Vibration Resistance |
Comply with IEC 61131-2 and EC 60068-2-6 |
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Impact resistance |
Comply with IEC 61131-2 and IEC 60068-2-27 |
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EMC Performance |
Comply with IEC 61131-2 and IEC 61000-4 |
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Input Parameters |
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Channel Number |
16 channel sink input |
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LED Indicator |
16 channel input LED indicator |
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Turn-on Voltage |
Min. 10VDC to Max.28VDC |
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Turn-off Voltage |
Max.5VDC |
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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 counting |
2.5ms |
A:16 channels, 24VDC, high-level active, PNP input type.
A:Yes, up to 200Hz, suitable for high-speed pulse signal acquisition.
Ideal for industries requiring high-speed, cost-effective distributed I/O:
