triconex 3721C analog input module
triconex 3721C analog input module
triconex 3721C analog input module
triconex 3721C analog input module
triconex 3721C analog input module

triconex 3721C analog input module

1.Warranty time: 1 year

2.Delivery time: 3-5 days

3.Product quality: new or discontinued second-hand

1. We are a global trading company, we have a large stock of spare parts, we also produce energy storage batteries

2. Our main sales products are industrial automation control equipment accessories, such as: controller board, processor module, communication module, input and output module, power module (various circuit boards and cards), touch screen, servo driver, servo motor, sensor, cable......

3. We can not only provide new products, but also supply cold and discontinued spare parts, all the discontinued parts will go through strict testing to ensure the reliability of product performance, so that customers can buy and use at ease

4. For more information, please contact us: Contact: Amy | Email: saul01@qq.com | Tel(WhatsApp/Wechat): +86-15359298283



The Triconex 3721C Analog Input module is an industrial automation control module manufactured by Invensys for a wide range of applications requiring high-precision analog signal input. The following is a detailed analysis of the module, including its main characteristics, specifications, functions and application fields:


First, the main features

High precision:

The Triconex 3721C provides high-precision analog inputs to ensure accurate signal processing. According to the data, its accuracy can reach from 0°C to 60°C, < 0.15% of FSR.

High input points:

The module supports up to 32 differential DC-coupled input points, which can meet the demand for a large number of analog signal inputs in complex industrial control systems.

Fast update rate:

The input update rate reaches 10 ms, ensuring timely capture and processing of rapidly changing signals.

Programmable resolution:

The resolution can be programmed to be 12 or 14 bits, which can be adjusted according to the actual application needs to achieve the best signal resolution.

Powerful common mode rejection:

The common mode rejection ability reaches -85 dB (DC -100 Hz), which effectively inhibits the common mode interference signal and improves the signal quality.

Input overrange protection:

Continuous input overrange protection of 150 VDC/115 VAC is provided to prevent module damage due to excessive input signals.

2. Specification parameters

Manufacturer: Invensys

Product Number: 3721C

Product type: Analog input module

Voltage range: 0 to 5 VDC or -5 to +5 VDC, accuracy ±6%

Input points: 32 differential, DC coupling

Input update rate: 10 ms

Resolution: 12 - or 14-bit programmable

Accuracy: from 0°C to 60°C, < 0.15% of FSR

Common mode rejection: -85 dB (DC -100 Hz)

Input overrange protection: 150 VDC/115 VAC continuous

Weight: 1.36 kg

Shipping weight: 4 kg

Iii. Function

Asynchronous measurement: Each channel asynchronously measures the input signal and puts the result into a value table, which is then passed to the relevant main processor module via the I/O bus.

Data processing: In TMR mode, the control program uses the median data; In duplex mode, the average value is used. This design improves the flexibility and reliability of data processing.

Multiplexers: Two independent 1x20 bipolar multiplexers are provided, allowing users to flexibly configure input channels as required.

Scalability: Card-to-card expansion can be achieved by automatically connecting to the 3700A Series host backplane and optional DMM via an analog backplane connection relay.

4. Application field

The Triconex 3721C analog input module is used in a wide range of industrial automation control systems, including but not limited to:


Electricity: Monitor and control various analog signals in power plants, such as temperature, pressure, flow, etc.

Oil and gas: Monitoring and controlling various parameters during oil and gas extraction, transportation and processing.

Chemical: Monitor and control reaction temperature, pressure, liquid level and other key parameters in the chemical production process.

Metallurgy: Monitoring and controlling furnace temperature, pressure and other parameters in the metallurgical industry to ensure the stability and safety of the production process.

V. Summary

The Triconex 3721C analog input module plays an important role in the field of industrial automation control with its high precision, high input count, fast update rate and powerful common mode rejection. By providing a stable and reliable analog signal input, it ensures the accuracy and reliability of industrial control systems.

triconex 3721C analog input module

triconex 3721C analog input module(图1)

triconex 3721C analog input module

triconex 3721C analog input module(图2)

triconex 3721C analog input module

triconex 3721C analog input module(图3)

triconex 3721C analog input module

triconex 3721C analog input module(图4)

triconex 3721C analog input module


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