Digital Output Module 8DO 24VDC Source Type

Digital Output Module 8DO 24VDC Source Type

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Product Description

Product Attributes

Model No.: CT-2228

Packaging & Delivery

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Product Description

CT-2228 Digital Output Module 8DO 24VDC Source Type

Module features

The CT-2228 is a robust 8-channel digital output module (8DO) featuring 24VDC source-type output (high-level active), engineered for reliable control of field devices such as relays, solenoid valves, pilot lights, and small actuators in Industrial Automation systems.

As a high-integrity PLC digital output module, it employs optocoupler isolation between the internal bus and field-side outputs, effectively eliminating ground loops and voltage surges—addressing common customer pain points like erratic actuation or hardware damage caused by electrical noise in harsh environments.

Each of the 8 output channels is equipped with a dedicated LED status indicator, enabling real-time diagnostics and rapid troubleshooting during operation or maintenance. For enhanced safety and durability, the module integrates comprehensive protection mechanisms including overcurrent protection, short-circuit protection, and thermal shutdown, which automatically disable output in case of overload—preventing permanent damage and minimizing unplanned downtime.

This 24VDC source-type digital I/O module is widely deployed across industries such as packaging machinery, food & beverage processing, water treatment plants, building automation, and custom industrial equipment, where precise, fail-safe control of pneumatic valves, alarm systems, or auxiliary drives is essential. Designed for DIN-rail mounting and built to industrial standards, the CT-2228 delivers a secure, scalable, and maintenance-friendly solution for modern industrial automation I/O applications.

Technical Parameters

General Parameters
Power Consumption	Max.51mA @ 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	1151475mm
Weight	65g
Environment Specification
Operating Temperature of Vertical Installation	-35℃~70℃
Operating Temperature of Horizontal Installation	-35℃~60℃
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
Vibration Resistance	Comply with IEC 61131-2 and EC 60068-2-6
Impact resistance	Comply with IEC 61131-2 and IEC 60068-2-27
EMC Performance	Comply with IEC 61131-2 and IEC 61000-4
Output Parameters
Channel Number	8 Channels
LED Indicator	8 Channels output LED Indicator
Rated Current	Typical value：500mA
Leak Current	Max. value：100uA
Output Impedance	<280mΩ
Output Delay	OFF to ON:Max.100us；ON to OFF:Max.150us
Protection Function	Over temperature turn-off: typical 135℃ Overcurrent protection: typical value 1.1A
Load type	GENERAL USE LOADS, PILOT DUTY LOADS

Application scenarios:

FQA

Q：What is the output type and logic level of the CT-2228 module?

A：The CT-2228 is a sourcing-type digital output module with 8 channels of 24VDC output, where the high level is active (output is ON when at 24V).

Q：Can this module directly drive field devices, and what safety protection features does it offer?

A：Yes. The CT-2228 can directly drive field devices such as relays and solenoid valves, and integrates overcurrent protection, thermal shutdown, short-circuit protection, and overload protection to ensure long-term reliability.

Q：How can I monitor output status, and does the module provide electrical isolation?

A：Each output channel features a dedicated LED indicator for real-time monitoring. Additionally, opto-couplers provide electrical isolation between the internal bus and field outputs, significantly improving noise immunity and system safety.

Certifications & Quality Assurance:

ODOT Products comply with international industrial standards, including CE and RoHS, and undergo strict quality control to ensure long-term reliable operation in industrial environments.