Month: December 2025

Models 3502E, 3503E, and 3505E can perform a self-test to detect a “stuck-open” condition

in which the circuitry is unable to determine whether a point has entered a shutdown state.

The ability to detect the point of shutdown is an important feature

since most security systems have a power failure trip feature.

In order to detect the presence of a “stuck-open” input,

the switch within the input circuit needs to be turned off in order for the opto-isolated circuit to read a

zero input (“off”).

The I/O communications processor will freeze the last reading while the test is running.

All TMR digital input modules support the hot standby feature and require a separate

external termination panel (ETP) with cable connections to the Tricon backplane.

Each module is mechanically keyed to prevent improper installation in the configured chassis.

ENVIRONMENTAL SPECIFICATIONS

Operating Temperature

WITHOUT INTERNAL FANS–4° F to 113° F (–20° C to 45° C)

WITH INTERNAL FANS–4° F to 131° F (–20° C to 55° C)

Contaminant Severity Level

ELECTRONICS

ISA-71.04. G3 level

ENCLOSURE

UL 50E and ASTM B117

Relative Humidity

Certifications

FM (U.S. and Canada), ATEX, IECEx, CCCex, CE,

UKCA, RoHS 2. NEMA 4X/IP66

Hazardous Area Classification

Class I, Division 2. Groups A, B, C, D; T4

ATEX and IECEx Zone 2 and Zone 22

II 3 G Ex ec nC dc IIC T4 Gc

II 3 D Ex tc IIIC T80°C Dc

China Zone 2 and Zone 22

Ex dc ec nC IIC T4 Gc

Ex tc IIIC T80°C Dc

I/O BUS CONNECTION

The SIE supports a TMR I/O bus connection with

special interface modules:

 Triconex 4701X IMSS – Serial RS-485

Distances up to 100 ft (30 m)

 Triconex 4703X IMFF – Fiber

Distances up to 43.5 mi (70 km)

When using 4703X IMFFs, customers select and

procure small form-factor pluggables (SFPs) to meet

their specific needs. For more information, see “Small

Form-Factor Pluggable (SFP) Requirements” in the

Tricon CX Addendum to Tricon User Guides.

PHYSICAL SPECIFICATIONS

Size

31.50 in (800 mm) width, 15.75 in (400 mm) depth,

47.24 in (1200 mm) height

Weight Range

300 to 350 lb. (136 to 159 kg) (depending on configuration)

FEATURES

 Protection against hazardous locations and harsh environments:

• Class I, Division 2 (U.S. and Canada)

• ATEX and IECEx Zone 2 and Zone 22

• China Zone 2 and Zone 22

• NEMA® 4X/IP66 rated

• Corrosion resistance:– Electronics: ISA-71.04. G3 level– Enclosure: UL 50E and ASTM B117

 Support for up to four Triconex 3902AX/3902X UIO Modules

 Input/output types that are software configurable

 Support for up to 64 TMR I/O points

 Wall-mounted

 Available in 24 VDC, and 120/240 VAC incoming power options

 Redundant power supplies

 Redundant fans (available with no fans)

 Supports star and daisy chain network topologies for the I/O bus

POWER DISTRIBUTION ARCHITECTURE

The SIE uses two independent 24 VDC power

sources to operate. One set of dual redundant power

supplies provides logic power to the I/O chassis and

another set of dual power supplies provides power to

the field instruments. This redundant power

architecture provides protection against a single power failure.

The SIE provides:

 Simplified ordering

 Standard cabinet design

 Flexible and scalable I/O deployment without rewiring

 Indoor/outdoor and local/remote installation support

 Support for a maximum of 64 user-configurable points

 Early-stage I/O wiring and late-stage project changes

The SIE has ETPs for termination of field device

signals. Each ETP point comes pre-configured with a

pass-through pluggable conditioning module (PCM).

A range of other PCMs is available.

The factory-manufactured SIE supports Schneider Electric’s Flexible Lean Execution strategy,

which shortens project schedules and reduces the risk of startup delays.

Note: Images are for illustrative purposes. Your product may look slightly different.

The Safety Intelligent Enclosure (SIE) consists of a

wall-mounted stainless steel cabinet, Tricon CX I/O

Expansion Chassis, Universal Input/Output (UIO)

modules, power supplies, fans, and termination panels.

The EcoStruxure Triconex Safety Intelligent Enclosure (SIE) provides

an integrated solution designed to be mounted close to field instrumentation to reduce cabling

The SIE includes Tricon™ CX Universal Input/Output (UIO) modules, power supplies,

and External Termination Panels (ETPs) that are pre-installed and tested,

and can be connected to a wide range of field devices.

The factory-manufactured SIE supports Schneider Electric’s Flexible Lean Execution strategy,

which shortens project schedules and reduces the risk of startup delays.

Note: Images are for illustrative purposes. Your product may look slightly different.

The Safety Intelligent Enclosure (SIE) consists of a

wall-mounted stainless steel cabinet, Tricon CX I/O

Expansion Chassis, Universal Input/Output (UIO)

modules, power supplies, fans, and termination panels.

Using TriStation™ 1131 Workbench software, you

can configure each Triple Modular Redundant (TMR)

UIO point as one of the following:

 Supervised Digital Input, 24 VDC, with 1 ms

Sequence of Events (SOE) capability

 Supervised Digital Output, 24 VDC

 Analog Input, 0-20 mA, configurable: with or

without HART pass-through

 Analog Output, 4-20 mA, configurable: with or

without HART pass-through

Features

Communications and integration

Online module replacement to ensure continuous operation and plant availability

Integration with EcoStruxure Foxboro DCS and all major distributed control systems (DCSs)

Comprehensive family of I/O modules

Up to 254 nodes of peer-to-peer communications

Achilles Level 1 cybersecurity certification

Maintenance

Built-in diagnostics and redundancy management — transparent to user

Easy diagnostics for status and fault analysis

Online modifications and changes, online module replacement and hot spare slot for continuous production without halting operations

Full set of software tools for every stage of the safety life cycle (TriStation™ suite)

Applications

Safety and critical control applications

– TÜV-certified for SIL 3 applications to international standard IEC61508:2010

Emergency shutdown (ESD)

Burner management system (BMS)

Turbomachinery control and protection (TMC)

– Works in both centralized plus distributed and remote I/O applications

– Suitable for use in harsh environments

Industries

Refining and petrochemicals

Upstream and midstream oil and gas

Chemicals and specialty chemicals

Power generation

Pharmaceuticals

The Tricon™ platform is the gold standard in safety instrumented systems.

Overview

Based on industry-leading Triconex™ triple modular redundant (TMR) technology,

Tricon has logged more than one billion hours with no failure on demand.

The Tricon system is certified by TÜV Rheinland for use in safety applications up to Safety Integrity Level 3 (SIL 3).

It is also marine-certified and nuclear 1E-certified.

Features

Communications and integration

Online module replacement to ensure continuous operation and plant availability

Integration with EcoStruxure Foxboro DCS and all major distributed control systems (DCSs)

Comprehensive family of I/O modules

Up to 254 nodes of peer-to-peer communications

Achilles Level 1 cybersecurity certification

Maintenance

Built-in diagnostics and redundancy management — transparent to user

Easy diagnostics for status and fault analysis

Online modifications and changes, online module replacement and hot spare slot for continuous production without halting operations

Full set of software tools for every stage of the safety life cycle (TriStation™ suite)