CT-121F: 16 Channel Digital Input PNP

C Series Remote I/O System

The C Series is a remote I/O system consisting of a network adapter module and extended I/O modules.

The CT-121F is a module with 16 digital input channels / 24VDC / Sink Type.

• The module supports 16 digital input channels, sink-type inputs, and a 24VDC input voltage.
• It can collect digital output signals from field equipment (dry contact or active output).
• Compatible with 2-wire or 3-wire digital sensors.
• The internal bus and field input of the module use opto-isolators.
• The module supports an input signal holding function with a configurable holding time.
• Equipped with 16 digital input channels, each with an LED indicator.
• Supports a counting function by adding a counting sub-module.
• Each input channel supports a 32-bit counter with a counting frequency of <200Hz.
• The digital signal input filtering time and counter byte transmission order are configurable.
• Each channel can be independently configured for counting mode and counting direction.
• Maximum bus length: 100m.

Technical Parameters
General Parameters

• Power Consumption: Max. 60mA @ 5.0Vdc
• Isolation: I/O to internal bus: opto-couple isolation (3KVrms)
• Field Power: Nominal: 24Vdc, Range: 19.2-28.8Vdc
• Wiring: Max. 1.5mm² (AWG 16)
• Mounting Type: 35mm DIN-Rail
• Size: 115 x 14 x 75mm
• Weight: 65g

Environmental Specifications

• Operational Temperature: -35~70℃
• Operational Humidity: 5%-95% (No Condensation)
• Protection Class: IP20

Input Parameters

• Channel Number: 16 sink-type inputs
• LED Indicator: LED for each of the 16 channels
• Turn-on Voltage: Min. 10Vdc - 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
• Sampling Frequency: 500Hz
• Counter Frequency: <200Hz

Subscribe to Our Newsletter!
Stay up to date with the latest product news and helpful tips to enhance your systems. Click here to subscribe!