4 channels analog input

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Product Description

Product Attributes

Model No.: CT-3274

Packaging & Delivery

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SPS-C Series IO_20260119_11180739

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Product Description

CT-3274 4 channels analog input /0&4-20mA/±20 mA

Module features

The CT-3274 is a high-precision 4-channel analog input module from Sichuan ODOT Automation System Co., Ltd.—a specialist in industrial I/O modules and Automation Solutions for global markets. Supporting 0–20 mA, 4–20 mA, or ±20 mA current signals with 16-bit single-ended resolution, the module accommodates both 2-wire (requiring external power) and 4-wire sensor inputs, features channel-to-channel isolation, and delivers ±0.1% full-scale accuracy at 25°C (±0.3% from –35°C to 70°C).

Technical parameters

General Parameters
Power	Max.173mA @ 5.0VDC
Isolation	The isolation voltage between the I/O channel and the system power supply: AC500V The isolation voltage between the I/O channel and the field power supply: AC500V Isolation voltage between the I/O channel and PE: AC 500V Isolation voltage between I/O channels: AC 500V
Field Power	NO
Wiring	Max.: AWG 18 Min.: AWG 24
Installation	35mm DIN-Rail
Size	1151475mm
Weight	65g
Environmental parameters
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
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
Input Parameters
Channel Number	4 channels
LED Indicator	4 LED channel state indicators
Input Range	Maximum: -23.5~23.5mA
Resolution Ratio	16 Bit
Acquisition Precision	±0.1% full range，@25℃
Acquisition Precision	±0.3% full range，@-35~70℃
Sampling Rrate	4ms/4 channels
Data Format	16-bit signed integer
Working Temperature	Standard mode: Overflow 32767 Standard mode: Underflow -32768 Channel disabled: -32767

Application scenarios:

FQA

Q：What industrial applications are suitable for CT-3274?

A: High-precision sensor acquisition, e.g., flow meters, pressure sensors.

Q：What is the isolation of CT-3274?

A: Channel-to-channel isolation to reduce common-mode interference.

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.