English
简体中文
News
Get to know our latest news
Tricon 3704E High-Density Analog Input Module | TRICONEX Safety Systems
Source: | Author:kongjiang | Published time: 2026-09-09 | 39 Views | 🔊 Click to read aloud ❚❚ ▶ | Share:
The Triconex product family includes a comprehensive range of modules. This section includes: a summary of the system components and their uses, a table that lists standard products and their model numbers, and a summary of specifications for each standard product in the Tricon family.

TRICONEX 3704E Analog Input Module | Tricon TMR I/O for Safety-Critical Applications

The Triconex product family includes a comprehensive range of modules. This section includes: a summary of the system components and their uses, a table that lists standard products and their model numbers, and a summary of specifications for each standard product in the Tricon family.
Summary of Tricon Components
Chassis
• Main Chassis—houses Main Processors, memory backup batteries, communication modules, and I/O modules.
• Expansion Chassis—for additional I/O modules up to 100 feet (30 meters) away from the Main Chassis. In restricted applications, operation up to 1,000 feet (300 meters) is supported.
• RXM Chassis—for I/O modules up to 7.5 miles (12 kilometers) away from the Main Chassis.
• Mechanical Keying—Each slot in the Tricon is mechanically keyed to correspond with a specific type of module. This prevents the installation of modules into improper slots.
Power Supply Modules
• Provide logic power to modules in the Main, Expansion, or RXM Chassis. Available in 24 VDC, 115 VAC, and 230 VAC versions. The power rating of each power supply is 175 watts at 140 ° F (60° C).
Main Processors
The Main Processors execute the system diagnostics and the user-written control program.
Communication Modules
• Tricon Communication Modules (TCM) support several Triconex protocols and applications and user-written applications on Ethernet (802.3) networks, including TriStation, Modbus TCP, and OPC. It also supports RS-232 and RS-485 serial communication with Modbus devices, TriStation 1131, and GPS for time synchronization.
• Enhanced Intelligent Communication Modules (EICM) support RS-232, RS-422 and RS485 serial communication with Modbus devices and TriStation 1131.
• Network Communication Modules (NCM) support several Triconex protocols and applications and user-written applications on Ethernet (802.3) networks, including TriStation 1131.
• Safety Manager Modules (SMM) act as an interface between a Tricon controller and a Honeywell Universal Control Network (UCN), one of three principal networks of the TDC-3000 DCS.
• Hiway Interface Modules (HIM) act as an interface between a Tricon controller and a Honeywell TDC-3000 Hiway Gateway and Local Control Network (LCN).
• Advanced Communication Modules (ACM) allow a Tricon controller to interface with a Foxboro Industrial Automation (I/A) Series DCS and TriStation 1131.
Fiber-Optic Remote Extender Modules (RXM)
For operation of Expansion Chassis up to 7.5 miles (12 kilometers) away from the Main Chassis, with exceptional immunity against electrostatic and electromagnetic interference.
Interface Modules
• HART Analog Input Interface Modules act as an interface between 4-20 mA analog input points from HART smart devices in the field and HART Host software running on a PC.
• HART Analog Output Interface Modules act as an interface between 4-20 mA analog output points from HART smart devices in the field and HART Host software running on a PC.
I/O Modules
• Digital Input Modules receive discrete signals of these nominal voltages: 115 VAC/VDC, 48 VAC/VDC, and 24 VAC/VDC. All voltages are available in TMR modules. Non-TMR modules are available in 24 VDC and 48 VDC only. Speed input and totalization modules are also available.
• Supervised Digital Output Modules produce discrete output signals of these nominal voltages, with diagnostic coverage of the field circuit and load device: 115 VAC, 120 VDC, 48 VDC, and 24 VDC.
• Digital Output Modules produce discrete output signals of these nominal voltages: 115 VAC, 120 VDC, 24 VDC, and 48 VDC. Dual output modules are also available.
• Analog Input Modules receive analog signals of these types: 0-5 VDC, -5 to +5 VDC, 0-10 VDC, and Thermocouple types J, K, T, and E.
Available in both isolated and DC-coupled versions.
• Analog Output Modules are available in these versions: eight output points at 4-20 mA; six output points at 4-20 mA and two at 20-320 mA; and four output points at -60 to 60 mA.
Tricon I/O Modules
3501E/3501T
3502E
3503E
3504E
3505E
3564
3511
3515
Digital Output Modules
3601E/3601T
3603B, 3603E/3603T
3604E
3607E
3611E
3617E
3623/3623T
3624
3625
3664
3674
3636R/3636T
Analog Input Modules
3700A
3701
3703E
3704E
3706A
3708E
3720
3721
3805E/3805H
3806E

3807

8321

3201

2351

9101-050f

General Environmental and EMC Specifications
Other than the optional conformal coating of all PCB assemblies, the Tricon is not explicitly protected against dust, corrosive atmospheres, or falling debris. Atmospheric and airborne-particle protection must be provided by housing the Tricon in an appropriate NEMA-rated enclosure.
Product Specifications
Chassis and Mounting Specifications
The Tricon system can be rack-mounted or panel-mounted in an industry-standard NEMA enclosure as described on the next page. Cabinets can optionally be equipped with base and casters. Multiple cabinets can be bolted together on the sides, but sufficient clearance must be allowed to fully open their front and rear doors.
Slot Covers
All unused slots in a chassis should be filled with Blank I/O Slot Panels (Model 8105) to maintain proper airflow.
Heat Management
When mounting Tricon chassis into vented or non-vented enclosures, the integration engineer must make provisions for sufficient heat management.
Triconex recommends the installation of baffles (Triconex part number 2000361-001), as shown on page 23. For temperatures above 122° F (50° C), other heat management provisions must be implemented, such as:
• Louvers and pagoda top
• Enlarged front and rear louvers with raised pagoda top
• Lower density filters
• Redundant fans (running all the time) with appropriate louvers and pagoda top
• Failure detection circuitry
Field Termination Options
Cable that connects the panel to the backplane of a Tricon chassis. A female connector at one end of the cable is keyed to match the male connector on the Tricon backplane. A male connector on the other end of the cable attaches to the standard termination panel. Two types of cables are available—one that exits the Tricon backplane at a ninety-degree angle and one that exits at a zero-degree angle (straight, front entry). External termination panel model numbers that end with a “Z” contain zero-degree interface cables. Model numbers for ninety-degree configurations are referenced throughout this guide. It is implied that where a model number is referenced for a ninety-degree configuration, a zero-degree configuration also is available. Zero-degree cables are designed to be used with G-Series Enclosures for Tricon controllers that have front access. For more information on G-Series Enclosures for Tricon Systems, see the G-Series Enclosures Product Specification Sheet, PSS Number: PSS 21H-2X8 B3, on the IPS Global Client Support (GCS) Web site at http://support.ips.invensys.com. In addition to standard termination panels, there are other types of termination panels, including:
• Basic termination panels
• Hazardous location (nonincendive) termination panels
• Termination panels with interposing relays
• Bypass panels for digital inputs
• Termination panels with RTD/TC/AI input signal conditioning
• Termination panels for 3603B digital output modules
• Termination panels for 3806E analog output modules
Basic Termination Panels
Basic termination panels are a low-cost means of connecting field wiring to a Tricon. However, basic termination panels do not provide any components other than a 56-pin connector and terminal blocks. These two components are mounted on a DIN rail-compatible plastic housing that snaps into mounting rails in accordance with DIN 50 022. The user must provide any other components required by their application. Other features of the basic termination panels are the same as for the standard panels.
Hazardous Location (Nonincendive) Termination Panels
Hazardous location (nonincendive) termination panels are suitable for use in Zone 2 (ATEX) and Class 1, Division 2 (North America) field circuits. These panels contain extra circuitry designed to limit power available to the field terminals and have been examined and certified by TÜV Rheinland as being nonincendive. This guarantees that if the field wires are accidentally opened, shorted, or grounded, and the Tricon is operating normally, the wiring and attached devices will not release sufficient energy to cause ignition in the specified flammable atmosphere.
Termination Panels with Interposing Relays
Interposing relays are recommended for applications that have load currents greater than 2 amps, or field voltages greater than 115 VAC, which require field-circuit conversion or compatibility with motor-starter circuits.
Each interposing relay provides an auxiliary contact that can be connected to a digital input module by means of an optional loopback cable to verify relay activation by the digital output module. Interposing relay panels use compact general-purpose power relays for maximum reliability and can be used with most digital output modules.
Bypass Panels for Digital Inputs
Bypass termination panels can be used to connect digital inputs using a bank of 32 pre-wired switches. The bypass panel has a master keyswitch and terminals for redundant +24 VDC power sources. Each input point contains an On status indicator and a position for a user-defined label. Each bypass termination panel comes with one or two 10- foot cables for connecting the termination panel to a Tricon backplane.
Termination Panels for Use with Signal Conditioners
Termination panels that use industry-standard analog signal conditioners provide a flexible, user-configurable interface to resistive thermal devices (RTDs), thermocouples, and 4-20 mA transmitters. Each termination panel supports 16 points, and each analog module can support up to 2 panels.
Fanned-Out Cables
Fanned-out cables are a low-cost alternative to using external termination panels. Fanned-out cables allow you to marshal field signals in a separate enclosure up to 99 feet (30 meters) from a Tricon. One end of a fanned-out cable has a female connector that connects to a Tricon chassis backplane. The other end of the cable contains 50 fanned-out leads, each individually labeled with its corresponding connector PIN.
Each fanned-out cable has the following characteristics:
• PVC outer covering
• 56-pin connector at one end
• 50 stranded, stripped, tinned, and labeled 22-gauge leads at the opposite end
Fanned-out cables should only be used with digital input and digital output modules. They are not certified for use with analog signals. Contact the IPS Global Client Support (GCS) center if you need a fanned-out cable for handling analog signals.
Although the normal length of all cables is 10 feet (3 meters), any length cable can be ordered up to 99 feet (30 meters) in 10-foot increments, using the last two digits of the cable model number to specify the length in feet. For example, the model number 9101-050F specifies a 50-foot cable instead of the normal 10-foot cable.
Termination Configuration Options
Terminations are available in various factory configurations:
• Non-commoned Terminations can accommodate individual power supplies for each point.
• Commoned Terminations can support one power supply which is shared by multiple points. Points can be commoned in groups of 8 and groups of 16.
• Analog signals can be read as 3-wire transmitter inputs, voltage inputs, or current inputs.
• Thermocouple terminations provide cold-junction temperature sensors and are available for either upscale or downscale burnout detection. For Model 3706A, upscale or downscale burnout detection depends on which termination panel is installed. For Model 3708E, upscale or downscale burnout detection is configured with TriStation 1131.
The “Termination Options” table (on the next two pages) shows the available termination choices for each I/O module and gives the correct model number for each choice.
Over-Current Protection
Non-basic termination panels offer over-current protection in various ways:
• Fuses for individual points and/or field power sources
• Series resistors
• Self-protection for digital output and analog output modules
If you are using basic termination panels, you must supply your own components for over-current protection.