ICS TRIPLEX T8461

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ICS TRIPLEX（三重冗余）

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ICS TRIPLEX T8461 Digital Output Module--KIMI

Warehouse: Spot
Warranty： 365 days
Quality: Original module
Condition： New
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Product Description

ICS Triplex T8461 | Trusted TMR 24/48 Vdc Digital Output Module

40-Channel TMR Digital Output Module for Safety-Critical SIL 3 Systems - Driving Solenoids, Relays & Actuators with Fault-Tolerant Precision

1. Product Overview

The ICS Triplex T8461 is a fully triplicated Triple Modular Redundancy (TMR) digital output module in Rockwell Automation's Trusted safety instrumented system (SIS), delivering 40 channels of 24/48 Vdc output for driving field devices (solenoid valves, relays, indicators) in safety-critical SIL 3 applications (IEC 61508/IEC 61511 compliant). It features 5 independent power groups (8 channels each) for isolated field power distribution, with 0.75A per channel and 6A per group current ratings, plus electronic short-circuit protection and automatic line monitoring to detect open/short field wiring faults. The module uses HIFT TMR architecture (3-2-0 operation) with comprehensive diagnostics, on-board 1ms SOE reporting, and dual redundant 24 V DC power from the controller chassis backplane (-40°C to +70°C operating range). Ideal for oil & gas, petrochemical, nuclear, and chemical industries, it ensures fault-tolerant output control and rapid fault isolation to maximize system availability in 24/7 operations.

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Key Specifications

• Model: T8461 | ICS Triplex Trusted TMR 24/48 Vdc Digital Output Module

• Architecture: HIFT TMR (Triple Modular Redundancy) for 3-2-0 fault-tolerant operation

• Channels: 40 TMR digital outputs; 5 independent power groups (8 channels each)

• Field Voltage: 18–60 Vdc (supports 24/48 Vdc field devices); System Supply: 20–32 Vdc (dual redundant 24 Vdc)

• Current Ratings: 0.75 A per channel; 6 A per power group; Min On-State Load: 25 mA

• Protection: Electronic latching short-circuit protection; Automatic line monitoring (open/short detection)

• Timing: 1 ms SOE resolution; ±0.5 ms timestamp accuracy; 0.5 ms turn-on/off delay

• Environmental: Operating: -40°C to +70°C (-40°F to +158°F); Storage: -40°C to +85°C; Humidity: 5–95% (non-condensing)

• Mechanical: 3U rack-mount (Trusted controller chassis); Dimensions: 222mm × 133mm × 56mm; Weight: 1.7 kg (3.75 lbs)

• Certifications: IEC 61508 (SIL 3), IEC 61511, CE, RoHS compliant

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2. Core Features

• HIFT TMR Architecture: Hardware-implemented triple modular redundancy for 3-2-0 operation, ensuring output integrity during single-channel failures

• Independent Power Groups: 5 isolated groups for flexible field power distribution and fault containment

• Comprehensive Diagnostics: Automatic line monitoring (open/short detection); triplicated current/voltage measurements per channel

• Precision Timing: 1 ms SOE reporting for event tracking; fast 0.5 ms turn-on/off delay for real-time control

• Hot-Swappable Design: Module replacement without system shutdown, minimizing maintenance downtime

• Robust Protection: Electronic latching short-circuit protection; 33 kΩ off-state leakage resistance; 0.6 Ω on-state resistance

• SIL 3 Compliance: Meets IEC 61508/IEC 61511 standards for safety-critical applications requiring high integrity

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YMGK Purchase Information

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3. Typical Applications

• Oil & Gas: Offshore platform ESD valve control; pipeline shutdown systems with distributed solenoid actuation

• Petrochemical: Refinery F&G alarm systems; reactor safety interlocks driving emergency shutdown valves

• Power Generation: Nuclear plant safety system actuation; thermal power unit BMS with critical relay control

• Chemical: Hazardous material handling valve control; batch process emergency stop (E-Stop) actuation

• Marine: FPSO safety control systems; ship engine ESD with redundant digital output actuation

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4. Installation & Maintenance

Installation: Mount in controller chassis I/O slot; connect dual redundant 24 Vdc system power; wire field power to 5 power groups; connect output channels to field devices; power on and verify LED status (Healthy: Green; Channel Fault: Amber; Power Group Fault: Red).

Maintenance: Weekly: Inspect LED indicators for channel/power group faults; Monthly: Test short-circuit protection and line monitoring; Annual: Review SOE logs, update firmware, and simulate TMR channel failures to validate voting logic.

Safety Notes: Use external intrinsic safety barriers for hazardous area connections; avoid exceeding 6 A per power group; validate TMR fault containment after configuration changes.

Technical Document | ICS Triplex T8461 | Trusted TMR 24/48 Vdc Digital Output Module for Safety-Critical Applications

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