The TRICONEX 3664 is a 32-channel 24VDC Dual Digital Output (DDO) module engineered for the Triconex Tricon Triple Modular Redundant (TMR) Safety Instrumented System (SIS).

Designed for high-integrity safety applications, the module integrates TMR architecture, 2-out-of-3 voting logic, comprehensive loop diagnostics, SIL 3 certification, and hot-swappable capability. It is optimized for critical safety interlock functions such as Emergency Shutdown (ESD) and Fire & Gas (F&G) systems.

1. Core Positioning & System Adaptation

Model: TRICONEX 3664

Module Type: 32-Channel Dual Digital Output (DDO)

Output Technology: Solid State Relay (SSR)

System Compatibility: Triconex Tricon TMR Fault-Tolerant Control System

Safety Integrity Level: SIL 3 (IEC 61508 / IEC 61511 compliant)

Lifecycle Status: Active / Mainstream production

Typical Applications:

Emergency Shutdown (ESD)

Safety valve actuation

Fire & Gas (F&G) alarm output

Motor/pump safety start-stop control

2. Key Technical Specifications
2.1 Output Characteristics

Number of Channels: 32 digital outputs

Output Type: Dual Digital Output (SSR-based)

Nominal Output Voltage: 24 VDC

Operating Voltage Range: 16–30 VDC

Maximum Voltage: 36 VDC

Maximum Continuous Current (per channel): 2 A

Surge Current Capability: 10 A (10 ms)

Leakage Current: ≤ 2 mA

Voltage Drop: < 1.5 VDC (typical)

Isolation: 1500 VDC (field side to system side)

Diagnostic Functions:

Open-circuit detection

Short-circuit detection

Load status monitoring

Output loop integrity diagnostics

2.2 Architecture & Reliability

Redundancy Architecture:

Triple Modular Redundancy (TMR)

2-out-of-3 (2oo3) voting mechanism

No single point of failure

Hot Swap Capability:

Supported

Online replacement without system shutdown

Response Time: < 1 ms

Diagnostics & Indication:

Independent per-channel status (PASS / FAULT / LOAD)

Module-level status indication

2.3 Electrical & Mechanical Specifications

Power Consumption: < 10 W

Operating Temperature: −40 °C to +70 °C

Installation: Standard Tricon rack mounting

Weight: Approx. 1.0–1.5 kg

3. Typical Application Scenarios
Emergency Shutdown (ESD) Systems

Safety interlocks for reactors, compressors, and storage tanks

Critical shutdown logic in oil, gas, and petrochemical plants

Safety Valve Control

Emergency shut-off valves (ESV)

Vent valves

Isolation valves

Fire & Gas (F&G) Systems

Alarm output circuits

Fire suppression equipment linkage

Gas detection system activation

Equipment Safety Protection

Pumps

Motors

Fans

Safe start/stop control and fault trip circuits

TRICONEX 3664｜Digital Output Module｜