3706A Triconex DCS Thermocouple Analog Input Module

The Triconex 3706A is a TMR thermocouple analog input module for Tricon safety systems, providing up to 32 differential TC channels (J/K/T/E/N/R/S/B) with 16-bit resolution, automatic CJC, ±0.25% FS accuracy, 50 ms typical update rate, and SIL 3–certified on-board diagnostics including open/short-circuit detection. Designed for hot-swappable deployment in SIS/ESD applications, it integrates three redundant measurement paths per channel with channel-to-system isolation and continuous fault voting to ensure fault-tolerant temperature acquisition in harsh industrial environments.

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Description

Technical Specifications
  • Brand
    Triconex
  • Model
    3706A
  • Product Name
    Thermocouple Analog Input Module
  • Place of Origin
    United States
  • Dimensions
    490 mm × 453 mm × 68 mm
  • HS Code
    8537101190
  • Weight
    2.5 kg
  • Operating Temperature
    -40°C ~ +70°C
  • Storage Temperature
    -40°C ~ +85°C
  • Power Supply
    ±10 V DC
  • Warranty
    12 month
  • Product Status
    new brand

Backed by abundant in-stock inventory and nearly 20 years of industry experience, our company stands as a leading player in the industrial control sector.We offer an extensive range of industrial control products covering numerous models. Should you have any other requirements, please feel free to contact us, and we will respond to you promptly.


Our main brand:

1.ABB's module cards, touch screens, controllers, etc., such as PP846 touch screen, IGCT starting with 5SHY, PM starting controller, AI, DO starting input/output module, SP starting Bailey module, etc

2.GE's module card CPUs, such as VMIC starter, IS200, IS215, IS400, IS420 series, etc,

3.Emerson's card components and EPRO probes, Westinghouse 1C series, Honeywell CC series, Schneider 140 series, Envision full series, Bentley 3500 series, Rexroth motors and drives, and Foxboro small modules.
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3706A Triconex Input and Output


Input

Features 32 channels of differential DC-coupled thermocouple analog inputs.

Compatible thermocouple types include J, K, T, E, R, S, B and N.

DC input impedance reaches 22 MΩ.

Maximum allowable common mode voltage is ±10 V DC.

Equipped with 16-bit A/D conversion.

Integrated cold junction compensation and signal linearization functions.

Open circuit detection is available for thermocouple wiring.

Output

This module has no field analog or digital output ports.

It sends processed 16-bit digital temperature data to Tricon main processors through the backplane bus.

Valid temperature readings are delivered to the safety control system based on TMR median voting algorithm.

3706A.jpg

Wiring Method for Triconex 3706A

The Triconex 3706A module is not equipped with on-board field wiring terminals. It links to a special external thermocouple termination panel through an ELCO interface cable.

Field thermocouple sensors are terminated onto screw terminals of the external termination panel. Every channel uses differential two-wire connection, and corresponding thermocouple extension wires shall be selected based on thermocouple categories.

Cold junction compensation sensors are embedded in the termination panel to guarantee precise temperature compensation. Cable shielding should be grounded at a single end to avoid ground loop interference.

The module plugs into the Tricon chassis backplane to obtain power and implement internal communication. It transmits digital data with main processors over the backplane bus. This module provides no field output wiring connections.
3706A.jpg


Frequently Asked Questions (FAQ)

1.How fast will you reply to my inquiry?

We process all inquiries efficiently and will respond promptly once we receive your message.

2.Do you carry large inventory of industrial control parts?

We maintain massive ready stock of mainstream automation spare parts to shorten lead times.

3.Can you source discontinued or obsolete PLC & DCS modules?

Absolutely.
We specialize in sourcing hard-to-find, obsolete and out-of-production industrial control components.

4.Do you inspect goods before shipment?

Every product undergoes thorough inspection before packing and dispatch.

5.Can you ship orders worldwide?

We provide global shipping with flexible logistics for urgent and regular orders.

6.What payment methods are available?

We accept multiple secure payment options. Please contact our sales team for detailed terms.

7.Do you offer warranty on industrial control spare parts?

Warranty differs by product.
Confirm specific warranty details with us prior to ordering.

8.Are your automation parts new or used?

We supply both new and fully tested used industrial control spare parts.
Please state your needs in your inquiry.

9.What is your typical delivery lead time?

In-stock items can be shipped quickly.
We will advise exact lead time for out-of-stock products after stock verification.

10.Can you offer technical support to check model compatibility?

Yes.Our professional team provides technical support to verify specifications and model compatibility.


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