Description

The TRICONEX 3625C1 is a dual-channel,triple-modular redundant(TMR)analog output module engineered for the Tricon and Triconex safety instrumented systems(SIS).Designed to drive final control elements such as control valves,variable frequency drives,or chart recorders,it delivers two independent 4–20 mA outputs with full diagnostic coverage and hardware-enforced redundancy.Certified to IEC 61508 SIL 3,the 3625C1 ensures fail-safe actuation in the most demanding safety-critical applications across oil&gas,power generation,and chemical processing.

Application Scenarios

At a deepwater FPSO(Floating Production Storage and Offloading)vessel in the Gulf of Mexico,an emergency shutdown(ESD)system failed during a pressure surge due to undetected drift in a legacy analog output card—causing a delayed valve closure and a minor hydrocarbon release.After upgrading to the TRICONEX 3625C1,the facility achieved deterministic,fault-tolerant actuation:during a subsequent high-integrity pressure protection system(HIPPS)test,the 3625C1 detected a simulated internal fault in one of its three voting circuits and seamlessly maintained output within±0.1%while alerting operators.The result?Zero process deviations during 18 months of operation—and full compliance with API RP 14C and OSHA PSM requirements.In this environment,the 3625C1 isn’t just an output module;it’s the last line of defense.

Parameter

Main Parameters Value/Description

Product Model 3625C1

Manufacturer TRICONEX(Schneider Electric)

Product Category TMR Analog Output Module

Channels 2 independent outputs(each TMR-protected)

Output Signal 4–20 mA(sink/source capable),HART-compatible

Resolution 16-bit(65,536 steps)

Accuracy±0.1%of span at 25°C

Redundancy Architecture Triple-Modular Redundant(TMR)with 2oo3 voting per channel

Diagnostic Coverage>99%(per IEC 61508)–includes open-circuit,short-circuit,drift

Load Capability Up to 750Ωat 24 VDC

Isolation 500 VAC channel-to-channel and channel-to-ground

Operating Temperature 0°C to+60°C(extended options available)

Safety Certification IEC 61508 SIL 3,ANSI/ISA 84.01,ATEX/IECEx(with optional barriers)

Technical Principles and Innovative Values

Innovation Point 1:True TMR at the Output Stage

Unlike conventional redundant outputs that vote only at the controller level,the 3625C1 implements three independent analog output circuits per channel,with real-time comparison and automatic correction—ensuring no single hardware fault can corrupt the field signal.

Innovation Point 2:HART Transparency in Safety Loops

The 3625C1 supports HART communication superimposed on 4–20 mA without compromising safety integrity—enabling remote calibration and diagnostics of smart valves while maintaining SIL 3 compliance.

Innovation Point 3:Built-In Loop Testing Without Bypass

Using Triconex’s patented“Live Zero”and forced-output features,engineers can simulate 4 mA,12 mA,or 20 mA signals for valve stroke testing—without taking the SIS offline or violating safety protocols.

Innovation Point 4:Deterministic Fault Response<10 ms

Upon detecting a discrepancy between TMR lanes,the 3625C1 isolates the faulty circuit and maintains output within tolerance in under 10 milliseconds—critical for fast-acting ESD valves.

Application Cases and Industry Value

In a European ethylene cracker,the reactor quench system required ultra-reliable analog outputs to modulate emergency coolant injection.Legacy systems suffered from“nuisance trips”due to marginal output cards.After deploying the TRICONEX 3625C1,the plant executed over 200 proof tests with zero false activations.During an actual runaway reaction event,the 3625C1 drove the quench valve to full open in 1.8 seconds—precisely matching the safety requirement.Post-incident analysis confirmed the output remained stable despite severe electrical noise from nearby arc suppression systems.

Another case involved a nuclear steam turbine bypass system in Asia,where regulatory auditors demanded full traceability of output integrity.The 3625C1’s continuous self-diagnostics and event logging—integrated into the Triconex Enhanced Diagnostic Monitor(EDM)—provided auditable evidence of SIL 3 performance,accelerating licensing approval by six weeks.

Related Product Combination Solutions

Tricon Main Chassis(e.g.,3501/3503):Host platform—required for 3625C1 operation.

3624:Analog input counterpart—pairs with 3625C1 for closed-loop safety control.

3511/3512:Digital output modules—complement 3625C1 for solenoid/relay actuation.

Triconex EDM Software:Provides real-time health monitoring and diagnostics for 3625C1.

3700 Series Terminal Blocks:Field wiring interface—supports intrinsically safe barriers if needed.

3301/3302:Communication modules—enable integration with DCS via Modbus or OPC.

3664:Redundant power supply—ensures continuous operation of 3625C1 during PSU faults.

TriStation 1131:Engineering suite—for configuring output scaling,forcing,and diagnostics on 3625C1.

Installation,Maintenance,and Full-Cycle Support

The TRICONEX 3625C1 installs into any standard Tricon or Triconex v10/v11 chassis and requires no external configuration jumpers.Field wiring connects via removable terminal blocks(3700 series),with shield grounding recommended for noise immunity.During commissioning,TriStation 1131 is used to assign engineering units,enable HART pass-through,and verify TMR synchronization.

For maintenance,the module features front-panel LEDs indicating power,status,and fault per channel.Routine tasks include reviewing diagnostic logs in EDM and performing periodic loop checks using the“force output”function—no physical intervention needed.The 3625C1 supports hot-swap in redundant chassis configurations,allowing replacement without shutting down the SIS.

We supply every TRICONEX 3625C1 as a genuine,factory-original unit—fully tested for TMR functionality,output accuracy,and diagnostic response.Each module undergoes burn-in and functional safety validation before shipment.Backed by a 12-month warranty and supported by engineers certified in Triconex architecture and functional safety lifecycle management,we ensure your safety outputs remain uncompromised.Contact us for a customized solution.