TRICONEX 3564 is a high-density digital input module with a single architecture, designed exclusively for the Invensys Triconex Tricon safety control system and powered by 24VDC.It is specially developed for safety-critical yet cost-sensitive industrial applications, featuring 64-point common-ground optically isolated inputs.

The module provides millisecond-level response, per-channel online self-diagnostics, fail-safe outputs, and hot-swappable replacement.

While maintaining fundamental safety performance, it enables large-scale discrete signal acquisition at a lower cost, making it a core choice for economical, high-density DI expansion in Tricon systems.

Basic Information

Core Electrical Specifications

1. Voltage & Electrical Ranges

• Nominal input voltage: 24 VDC
• Operating voltage range: 15–30 VDC
• Maximum continuous voltage: 36 VDC
• Switching threshold (OFF → ON): ＞15 VDC
• Switching threshold (ON → OFF): ＜6 VDC
• Typical hysteresis: 4 VDC
• Input impedance: ＞3.0 kΩ
• Channel isolation: 1500 VDC optical isolation, full electrical isolation between field and system sides

2. Response & Speed

• Input delay (OFF→ON): ＜2 ms
• Input delay (ON→OFF): ＜2 ms
• Signal processing: Independent acquisition on three channels → voting by main controller
• Compatible signal types: Dry contacts, active 24VDC, proximity switches, valve position feedback, equipment status signals

3. Power Consumption & Load

• On-state power per channel: 0.2 W per point
• Power at maximum field voltage: 0.5 W per point
• Total module logic power: ＜10 W
• On-state current: 2–3 mA (typical)

4. Self‑Diagnostic Performance

• Diagnostic coverage: Real-time online diagnostics for all channels
• Detected fault types:
• Channel open / short circuit
• Input stuck ON (cannot turn off)
• Input stuck OFF (cannot turn on)
• Module hardware failure
• Communication abnormality
• Fault detection time: ＜0.5 second
• Fail-safe behavior: Automatically reports OFF (0) for faulty points, forces safe state
• Fault indication: Module FAULT LED on + system alarm + channel status reporting

Hardware Structure & Physical Characteristics

1. Internal Architecture

• 3 independent input groups for parallel acquisition and separate processing
• On-board microprocessor for each channel for signal filtering, threshold judgment and diagnostic detection
• Opto-isolation components to fully separate field side from control system side
• Single architecture: redundancy only on safety-critical paths, not full TMR triplication, balancing safety and cost

2. Physical Dimensions & Weight

• Compatible with: Tricon standard main chassis / expansion chassis (8110/8111/8112)
• Module weight: approx. 4.7 lbs (2.1 kg)
• Installation: direct chassis plug-in, backplane bus communication
• Cooling: natural convection, meets system operating requirements at 0–60°C

3. Front Panel Indicators

• PASS: module power-on self-test passed, normal operation
• FAULT: module / channel fault, maintenance required
• ACTIVE: module in operating state, participating in control
• Channel status LEDs: one LED per input for 64 points, real-time ON/OFF indication

Functional Features

1. Signal Acquisition

• Supports both dry contact and active 24VDC input types
• Compatible with field valve limit switches, pump / fan status, emergency stop auxiliary signals, instrument status, etc.
• Built-in hardware filtering for anti-interference and false-trigger prevention
• Supports active-high / active-low configuration via software

2. Comprehensive Online Diagnostics

• Continuous stuck-ON / stuck-OFF detection for each input channel
• Real-time channel status reporting to main processor (MP)
• Single-channel failure does not affect other channels
• Detailed diagnostic information accessible via TriStation 1131
• Traceable fault logs for easy maintenance and troubleshooting

3. Hot Spare & Online Maintenance

• Supports hot-spare configuration: automatic bumpless transfer upon failure
• Supports hot insertion / removal and online replacement without system interruption
• Automatic status synchronization during failover, no signal loss
• Replacement without power shutdown, meeting high-availability requirements for SIS

4. Safety Design

• Fail-safe operation: outputs OFF on fault to prevent hazardous conditions
• Opto-isolation against ground loops, surges and electromagnetic interference
• Complies with Tricon system safety design standards
• Suitable for SIL 1/2 safety loops

5. Wiring & Accessories

• Must be used with an External Terminal Panel (ETP)
• Supports standard terminals for 24–12AWG (0.3–2.1 mm²) cables
• Supports 10 ft standard cables, extendable up to 30 meters for remote wiring
• Supports commoned wiring to simplify field cabling

Environmental & EMC Specifications

1. Environmental Parameters

• Operating temperature: 0°C ~ 60°C (32°F ~ 140°F)
• Storage temperature: -40°C ~ 75°C (-40°F ~ 167°F)
• Relative humidity: 5% ~ 95%, non-condensing
• Vibration: 2G @ 10–150Hz (IEC 60068-2-6)
• Shock: 15G, 6–11 ms (IEC 60068-2-27)

2. Electromagnetic Compatibility (EMC)

• ESD: IEC 61000-4-2, 8kV air / 4kV contact
• EFT: IEC 61000-4-4, 2kV power / 1kV signal
• Surge immunity: IEC 61000-4-5
• Radiated immunity: IEC 61000-4-3, 10V/m
• Conducted / radiated emissions: CISPR 11/16 Class A

Comparison with TMR Modules in the Same Series (3504E vs 3564)

Typical Applications

Petrochemical / Oil & Gas

• Status monitoring of pumps, compressors and fans
• Acquisition of valve limit, level switch and pressure switch signals
• Non-core SIS loops and auxiliary interlocks

Power / Energy

• Auxiliary status of generator sets
• Switchgear and circuit breaker position signals
• Status acquisition for cooling water / fan systems

Chemical / Pharmaceutical

• Level / pressure switches for reactors and storage tanks
• Status of conveying equipment and agitators
• Economical safety I/O expansion

General Industry

• Production line status and auxiliary monitoring of emergency stop loops
• High-density DI expansion for remote I/O stations

• Cost-sensitive applications requiring safety and reliability

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