Bently
View products
Product image is representative; revision or series may vary. Contact us to request a specific version.
Get a quick price for 3721
For more information on how your data is processed and stored by Apterpower please read our privacy policy
Technical specifications for 3721
-
Manufacturer:Invensys
-
Product Category:DCS Systems
-
Spare Part Number:3721
-
Estimated shipping dimensions:49x45.3x6.8cm
-
Weight:2.85 kg
-
Tariff Code:8537101190
-
Counliy of origin:USA
-
Number of input signals:32 differential, DC-coupled
-
Input update rate:10 ms
-
Resolution:12 bits or 14 bits programmable
-
Accuracy:< 0.15% of FSR from 0° to 60° C
-
Input resistance (load):10 MΩ (DC), minimum
-
Input resistance at power off:140 kΩ (DC), typical
-
Common mode rejection (typical):-85 dB (DC - 100 Hz)
-
Common mode voltage range:-12V to +12V peak
-
Channel-to-channel isolation:420 kΩ, typical
-
Input voltage range:0 to 5 or –5 to 5 VDC
-
Input over-range measurement:+6%, -5.3 to +5.3 VDC
-
Logic power:< 15 watts
-
Input over-range protection:150 VDC continuous, 115 VAC continuous
-
Input current range:0 to 20 mA with 250 Ω shunt resistor
Information
Overview
Manuals
Common Applications
Product Precautions
The 3721 is a TMR Analog Input Module with a voltage range of 0 to 5 VDC or -5 to +5 VDC. The 3721 module can be installed only in Tricon v10.2 and later systems.
- Integrates 32 channels per slot, reducing rack space and wiring costs
- Corrects temperature and zero drifts during operation without manual maintenance
- Supports hot-spare configuration for microsecond-level transfer without data fluctuations
The module provides 32 single-ended input channels utilizing a DC-coupled circuit framework. Each channel incorporates a 16-bit resolution A/D converter to transform standard 4-20mA current signals or 0-5V DC voltage signals from field transmitters into digital values. High-voltage isolation between the bus and field circuits blocks external electrical interference and ground loop surges.
Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description.
Triconex 3721 Analog Input Module Manuals, Datasheets, Drivers, Link
Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description.
Oil Extraction and Drilling
Monitors analog pressure and temperature signals from wellhead Christmas trees and blowout preventers to provide overpressure safety interlock inputs.
Petrochemical Refining
Collects multi-point temperature distribution signals from atmospheric distillation and hydrocracking reactors to prevent runaway reactions.
Coal Gasification Industry
Continuously monitors coal gasifier shell temperature and internal pressure analogs as key triggers for emergency shutdown systems.
Nuclear Power Generation
Monitors primary loop coolant flow and reactor core pressure analog signals to provide data to the reactor protection system.
Oil and Gas Pipelines
Monitors pipeline pressure at the inlets and outlets of intermediate pumping stations for leak detection and pipeline rupture isolation protection.
Thermal Power Plants
Measures boiler drum water level and main steam pressure to prevent incidents caused by high or low drum water levels.
When using the 3721 analog input module, maintain correct input signal polarity and ensure transmitter wiring matches the single-ended input framework to prevent ground loop interference. Rely on its automatic online self-calibration to eliminate temperature drifts, and review self-diagnostic reports if abnormal measurement deviations occur. Under dual-module redundant configurations, when utilizing the hot-swapping feature for online replacement of a faulty module, ensure the spare unit matches the exact model and firmware version to achieve a bumpless fault-tolerant switchover.
Alternative Names
372I
Technical notes
The 3721 module integrates continuous online self-diagnostics and automatic self-calibration functions to monitor channel health status and report to the system in real time. The module supports hot-swapping, allowing online replacement of faulty units without interrupting system operation. Overvoltage protection circuitry on the inputs prevents hardware damage caused by field wiring errors.
FAQ View All FAQ
-
What is 3721?3721 is Analog Input Module.
-
How to use 3721?Plug into a Triconex rack slot and connect to field analog sensors.
-
What is the purpose of 3721?Used to receive and process DC current or voltage signals from field transmitters.
-
How many channels does 3721 have?The module provides 32 single-ended input channels.
-
How many parts do you have in stock?We have an extensive stock base consisting of ten thousands of new and discontinued automation parts including those from leading manufacturers such as:Control Systems (DCS, PLC, CNC) ,Panel Controllers,HMI and Display Panels,Drives,Encoders and Resolvers,Power Supplies.
-
Do you offer global delivery services?Yes. We ship globally, and we are able to quickly deliver parts globally to any corner of the world. Unless otherwise specified, we will ship your order via (DHL). We can also ship through FedEx, UPS, and TNT. We can also use your account.
Manufacturers
Supporting new and legacy automation
Whether you're maintaining existing equipment or sourcing parts for current systems, we provide fast, dependable supply you can rely on.
-
Please try to be as accurate as possible with your search.
-
We can quote you on 1000s of specialist parts, even if they are not listed on our website.
-
We can't find any results for “”.
PRODUCTS IN SEARCH PAGE ()
50+ account managers available now
Related reading
Related cases and sourcing guidance
View all case studies
Manufacturers
You May Also Like
Explore related automation components available through Apter Power.
Manufacturers
Product Browsing History
Revisit the products you recently viewed on Apter Power.
SPEAK TO OUR TEAM
Let’s find the right solution for you.
Send us the part number, quantity and delivery destination. Our team will help confirm availability and lead time.
-
Whatsapp: +86 18030235313
Send us a message. -
sales13@apterpower.com
Complete our online form. -
+86 18030235313
Speak to our team in your native language.