Name: Triconex 3720 | 64-point TMR single-ended analog input module
Brand: TRICONEX
SKU: 2918959
Price: 1 USD
Availability: InStock

Product Details

Built for Tricon v10.2 and later systems, the Triconex 3720 is a 64-point TMR single-ended analog input module. It converts 0–5 VDC field signals into triplicated process values, giving the controller a high-density input bank with programmable 12-bit or 14-bit resolution.

With Triconex 3720, each of the 64 field inputs is referenced to its assigned return rather than paired with a second signal lead. The single-ended values are sampled at a 10 ms update rate, and the conversion can be set to 12-bit or 14-bit resolution before the triplicated data is delivered to the controller.

The field side of Triconex 3720 is separated from the system side by a specified 800 VDC minimum isolation. A 0–20 mA signal can use a 250 Ω shunt, while the separate Field indicator works alongside Pass, Fault, and Active to show field and module status.

Specifications Overview

Technical Item	3720
Brand	Triconex
Product Type	TMR single-ended analog input
System	Tricon v10.2 and later
Input Points	64 single-ended
Input Range	0–5 VDC
Input Update Rate	10 ms
Resolution	12 or 14 bits, programmable
Accuracy	Less than 0.15% of FSR, 0–60 °C
Input Resistance	10 MΩ minimum
Channel Isolation	420 kΩ typical
Field-to-System Isolation	800 VDC minimum
Current Conversion	0–20 mA plus 6% over-range with 250 Ω shunt
Over-range Protection	150 VDC or 115 VAC continuous
Logic Power	Less than 12 W
Indicators	Pass, Fault, Active, Field

Operating Characteristics

Triconex 3720 uses a single-ended 64-point layout and a 10 ms sample period, which keeps the channel organization different from the 32-point differential input family.

Single-ended channels

Each of the 64 inputs uses its field return arrangement instead of a differential pair.

Programmable resolution

The input conversion can be configured for 12-bit or 14-bit resolution.

Fast update path

The 10 ms input update rate links the field sample to the controller data image.

System Integration

Triconex 3720 belongs in the later Tricon platform versions and keeps field-side wiring separated from the controller-side bus.

Version boundary

The module is specified for Tricon v10.2 and later systems.

Low-density compatibility

A low-density chassis must already be upgraded to v10.2.x or later before this module is fitted.

Isolation path

The field input side has 800 VDC minimum isolation from the system side.

Product Q&A

Why are the 64 Triconex 3720 inputs called single-ended?

For Triconex 3720, Each input is measured against its assigned return instead of being paired with a second signal lead. That wiring organization is different from a differential analog input bank.

What does the programmable resolution change in Triconex 3720?

Triconex 3720 can present the converted value at either 12-bit or 14-bit resolution. The choice affects the digital representation of the 0–5 V input, not the number of field channels.

How is a 0–20 mA signal connected to Triconex 3720?

For Triconex 3720, A 250 Ω shunt converts the current into the voltage seen by the input circuit, with the specified 6% over-range allowance. The module remains a 64-point single-ended input device.

Which chassis version is required for Triconex 3720?

Triconex 3720 is specified for Tricon v10.2 and later systems. A low-density chassis must already be upgraded to v10.2.x or later for this module arrangement.

How do the two isolation figures apply to Triconex 3720?

For Triconex 3720, The 800 VDC minimum value describes field-to-system isolation, while 420 kΩ typical describes channel isolation. They refer to different parts of the input structure.

How does the Field indicator differ from Pass and Fault in Triconex 3720?

For Triconex 3720, The Field indicator identifies the field-side condition separately from Pass, Fault, and Active module indicators. This lets the input wiring state be read apart from the module-level state.

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Product Name	Triconex 3720 \| 64-point TMR single-ended analog input module
Item NO.	2918959
Weight	0.1 kg = 0.2205 lb = 3.5274 oz
Category	TRICONEX
Brand	TRICONEX
Creation Time	2026-10-13

Triconex 3720 | 64-point TMR single-ended analog input module Item NO.: 2918959

Triconex 3720 | 64-point TMR single-ended analog input module