2. Key Features

• 16 guarded DC outputs, grouped into two isolated banks of 8 channels each。

• Monitored fault detection: Detects open/short circuits, overloads, and fuse faults。

• Fault‑tolerant parallel operation: Dual modules can work in parallel for uninterrupted load control。

• Hot‑swappable: Online replacement without system shutdown。

• 100% self‑diagnostics: Automatic testing of all output and logic circuits。

• Front‑panel accessible fuses: Simplifies maintenance。

• 2500 Vrms isolation: Between field and logic circuits for EMI protection。

• TÜV certified (Risk Class 5): Compliant with IEC 61508 (SIL 3)。

3. Technical Specifications

• Model: T3481

• Manufacturer: Rockwell ICS Triplex

• System Compatibility: Regent/Trusted T3 series TMR systems

• Logic Power: 24 VDC ±10%

• Output Voltage: 24 VDC (user‑supplied field power)

• Output Current: 2 A per channel; 16 A total

• Isolation Voltage: 2500 Vrms (field‑to‑logic)

• Power Consumption: 3 W (max)

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

• Storage Temperature: −40°C to +85°C

• Humidity: 5%–95% non‑condensing

• Dimensions: 120 mm × 140 mm × 30 mm

• Weight: 0.5 kg

• Certifications: TÜV (Risk Class 5), CE, UL, SIL 3

4. Installation & Wiring

4.1 Mechanical Installation

• Mount in a standard ICS Triplex T3 series rack (slots 0–15)。

• Ensure chassis grounding for ESD protection。

• Maintain ≥25 mm clearance around the module for ventilation。

4.2 Wiring

• Backplane Connector: Connects to system backplane for 24 VDC logic power and triplicated I/O Safetybus communication。

• Field Terminals:

  • Two 24 VDC power inputs (for 8‑channel banks)。

  • 16 output channels (CH1–CH16) for field loads (solenoids, relays, contactors)。

• Cable Requirements: 18–22 AWG stranded copper wire; torque terminals to 0.8–1.0 N·m。

• Fuses: Install 3 A fuses per bank (front‑panel accessible)。

5. Operation

5.1 Power‑Up & Self‑Test

• Apply 24 VDC logic power; the module runs a 5‑second initialization sequence：

  1. LED test (all status lights on)

  2. RAM/PROM/Output circuit self‑tests

  3. Normal mode (green “ACTIVE” LED on)

• “ACTIVE” LED (green) lights; “FAULT” LED (red) remains off if healthy。

5.2 Normal Operation

• Output Control: Triplicated commands from the system processor are voted by two independent microcontroller sections; outputs activate only if both sections agree。

• LED Indicators:

  • Green: Channel ON。

  • Off: Channel OFF。

  • Red: Channel fault (open/short circuit, overload, fuse blow)。

• Monitoring: Continuously checks field wiring and load status; reports faults to the system in real time。

5.3 Fault Handling

• Channel Fault: Module disables the faulty channel; “FAULT” LED lights. Check wiring, load, or fuses。

• Module Fault: Communication loss or internal error. Verify backplane connection or replace the module (hot‑swap supported)。

6. Maintenance

• Monthly Inspection: Check LED status, wiring tightness, and fuse condition。

• Cleaning: Use a dry cloth to remove dust; avoid harsh chemicals。

• Self‑Test: Trigger via system software quarterly to validate diagnostics。

• Replacement: Hot‑swap procedure: remove faulty module, insert new one, and confirm operation via system diagnostics。

7. Safety Precautions

• ESD Protection: Wear a grounded wrist strap when handling the module。

• Power Isolation: Disconnect both 24 VDC logic power and field power before wiring。

• Load Ratings: Do not exceed 2 A per channel or 16 A total current。

• Fault Response: Address “FAULT” LED alerts immediately to maintain safety integrity。