Product Introduction: ICS Triplex T8461 Digital Output Module
The ICS Triplex T8461 is a safety-grade TMR (Triple Modular Redundancy) digital output module of the Trusted TMR Series, engineered for reliable digital signal output in mission-critical industrial environments. With a fully triplicated, fault-tolerant circuit design and optional line monitoring, it eliminates single-point failures, ensuring stable operation for safety-critical applications.
Equipped with 40 digital output channels divided into 5 independent power groups (8 channels each), the T8461 supports 18-60Vdc field voltage, 0.75A continuous current per channel, and 6A per power group. It operates on a 20-32Vdc system supply, with Ord/HazLoc/ATEX/IECEx certifications, making it suitable for hazardous and non-hazardous industrial areas such as oil & gas, petrochemical, power generation, and chemical processing. The module features electronic short circuit protection, fast response times, and robust isolation, integrating seamlessly with Trusted TMR systems.
Technical Specifications of ICS Triplex T8461 Digital Output Module
Core Functional Parameters of T8461 Digital Output Module
Architecture: Fault-tolerant, fully triplicated circuit with optional line monitoring (TMR technology)
Product Type: Trusted TMR 40-Channel Digital Output Module
Number of Outputs: 40 independent digital output channels
Independent Power Groups: 5 groups (8 outputs per group)
Output Response: Turn-on/off delay 0.5ms; Sample Update Time 0.5ms
Sequence of Events (SOE): Event Resolution 1ms; Time-stamp Accuracy ±0.5ms
Self-Test Interval: 2 minutes (automatic fault detection)
Intrinsic Safety: Requires external barrier (for hazardous area use)
Electrical Specifications of ICS Triplex T8461
Supply Ratings: 20-32 Vdc, 27 W
System Supply Voltage Range: 20-32Vdc
Operational Output/Field Voltage Range: 18-60Vdc
Output Voltage Measurement Range: 0-60Vdc; Maximum Withstanding: -1 to 60Vdc
Output Current Rating: 0.75A continuous per channel; 6A per power group
Minimum On State Load Current: 25mA
Output Resistance: On State 0.6Ω; Off State (effective leakage) 33kΩ
Capacitance Ratings: Pre release 3.5: 30-55uF; Release 3.5: ≥3500uF at 0.75A
Flashing/Pulsing Current Loads: Release 3.5 recommended
Protection: Electronic latching short circuit protection (automatic)
Isolation: Field Common Isolation - Sustained Working ±250Vdc; Maximum Withstanding ±2.5kVdc
Crosstalk: Channel to Channel >-40dB
Power Consumption: Field Supply (24V, 0.75A/channel) 18W; System Supply (24V) 22W
Certifications: Ord/HazLoc/ATEX/IECEx; Complies with IEC 61508 (SIL 3)
Mechanical & Environmental Parameters of T8461 Digital Output Module
Mechanical Parameters
Dimensions (HxWxD): 266mm (10.5ins) x 31mm (1.2ins) x 303mm (12ins)
Weight: 1.285kg (2.8lbs)
Mounting: Rack-mounted (compatible with ICS Triplex T8100/T8300 chassis I/O slots)
Connectors: Dedicated terminal blocks for power supply, digital outputs, and communication
Environmental Parameters
Operating Temperature: -5°C to 60°C (23°F to 140°F)
Non-operating Temperature: -25°C to 70°C (-13°F to 158°F)
Temperature Change Rate: 0.5ºC/min
Operating Humidity: 5-95% RH (non-condensing)
Environmental Specifications: Refer to Document 552517
Protection Class: IP20 (panel/rack mount, suitable for control cabinets)
Key Features & Advantages of ICS Triplex T8461 Digital Output Module
TMR Fault Tolerance: Fully triplicated circuit with optional line monitoring, eliminating single-point failures for critical digital output applications.
High Channel Density: 40 digital output channels divided into 5 independent power groups (8 channels/group), optimizing power distribution and fault isolation.
Flexible Voltage/Current Ratings: 18-60Vdc field voltage, 0.75A/channel, 6A/group, compatible with diverse industrial loads.
Reliable Protection: Electronic latching short circuit protection (automatic), safeguarding the module and connected devices.
Fast Response: 0.5ms turn-on/off delay and sample update time, ensuring real-time digital output control.
Hazardous Area Compatible: Ord/HazLoc/ATEX/IECEx certifications, suitable for explosive industrial environments (requires external intrinsic safety barrier).
Robust Isolation: ±2.5kVdc maximum withstand isolation and >-40dB crosstalk, minimizing signal interference.
Automatic Self-Test: 2-minute self-test interval for proactive fault detection, reducing downtime.
Seamless Integration: Compatible with ICS Triplex T8100/T8300 chassis and Trusted TMR systems, ensuring system compatibility.
Applications of ICS Triplex T8461 Digital Output Module
The T8461 digital output module is dedicated to Trusted TMR safety automation systems, widely used in high-risk industrial applications:
Oil & Gas Industry: Digital output control for ESD (Emergency Shutdown) systems, valve actuators, and field devices in hazardous areas.
Petrochemical Plants: Driving industrial valves, pumps, and safety interlocks in high-risk chemical processes.
Power Generation: Digital control for turbine auxiliary systems, boiler safety components, and switchgear.
Chemical Processing: Output control for safety instrumented systems (SIS), ensuring compliance with safety regulations.
Industrial Automation: Reliable digital output for mission-critical control systems where signal stability and fault tolerance are paramount.
Installation Guide for ICS Triplex T8461 Digital Output Module
Preparation
Gather tools: screwdriver, torque wrench, wire stripper, cable cutter, multimeter.
Inspect the T8461 module for damage; verify model and certifications match application requirements.
Prepare 20-32Vdc system supply, field wiring, and external intrinsic safety barriers (if used in hazardous areas).
Power off and ground T8100/T8300 chassis; review Document 552517 for environmental requirements.
Mounting
Install the T8461 in an available T8100/T8300 I/O slot, secure with mounting screws.
Ensure ≥8cm clearance for ventilation (manages power consumption and heat dissipation).
Wiring
Connect 20-32Vdc system supply to dedicated terminals (correct polarity).
Wire digital outputs to field devices, grouping channels per 5 independent power groups (8 channels/group).
Install external intrinsic safety barriers (if applicable) for hazardous area use; follow barrier guidelines.
Use shielded cables to minimize crosstalk; connect cable shields to module ground.
Testing & Configuration
Power on chassis and module; check power/status LEDs (green = normal operation).
Verify self-test function (runs every 2 minutes) via status indicators and system diagnostics.
Test digital output channels: activate each channel, verify 0.75A current and 0.5ms response time.
Simulate short circuit to test automatic latching protection; confirm module shuts down affected channel.
Verify SOE functionality: trigger test events, confirm 1ms resolution and ±0.5ms time-stamp accuracy.
Usage Notes
Do not exceed 0.75A per channel or 6A per power group; avoid field voltage outside 18-60Vdc.
Use external intrinsic safety barriers in hazardous areas to comply with Ord/HazLoc/ATEX/IECEx certifications.
Maintain ≥8cm ventilation clearance; operate within -5°C to 60°C and 5-95% RH (non-condensing).
Use shielded cables to minimize crosstalk; ensure proper grounding for isolation and anti-interference.
Regularly check self-test status and output performance; replace with same model/certifications if faulty.
Install in IP20 control cabinet to protect against dust and physical contact.
For flashing/pulsing current loads, use Release 3.5 for optimal performance.
Packaging List
1 x ICS Triplex T8461 TMR 40-Channel Digital Output Module
4 x Mounting Screws (for T8100/T8300 chassis)
1 x System Supply Cable (1.5m), 1 x Digital Output Test Cable (2m)
1 x Installation Manual, 1 x Wiring Diagram, 1 x Certification Document (Ord/HazLoc/ATEX/IECEx)
1 x Configuration Guide, 1 x Document 552517 (Environmental Specifications) (all English)
FAQ about ICS Triplex T8461 Digital Output Module
Q1: What are the output current ratings of the T8461?
A1: 0.75A continuous current per channel, 6A per independent power group (5 groups total, 8 channels/group).
Q2: What voltage ranges does the T8461 support?
A2: System supply 20-32Vdc; operational field/output voltage 18-60Vdc; output voltage measurement 0-60Vdc.
Q3: Does the T8461 have short circuit protection?
A3: Yes, it has electronic latching short circuit protection that operates automatically to safeguard the module and connected devices.
Q4: Is the T8461 suitable for hazardous areas?
A4: Yes, it holds Ord/HazLoc/ATEX/IECEx certifications, but requires an external intrinsic safety barrier for use in hazardous areas.
Q5: What is the response time of the T8461?
A5: Output turn-on/off delay and sample update time are both 0.5ms, ensuring real-time digital output control.
