• Manufacturer: ICS Triplex / Rockwell Automation

• Safety Level: IEC 61508 SIL 3, TÜV certified

• Architecture: TMR-compatible, N+1 redundant, current-sharing

• Hot Swap: Power packs can be replaced online without system shutdown

• Applications: ESD, F&G, BMS, Turbine Control, and other high-integrity safety systems

2. Product Range (from original manual)

3. Specifications

3.1 Mechanical

• Form Factor: 1U (44 mm) × 19” rack width × 300 mm depth

• Weight: 0.7–1.2 kg

• Slots: 3 × single-width power pack slots (T8231/T8232)

• Mounting: 19” rack, horizontal, front–rear airflow

• Backplane: T8240 dedicated power backplane, redundant 24/28 V DC output to system I/O backplane

3.2 Electrical (Shelf Capability)

• Output Voltage: 24 V DC nominal (20–32 V DC adjustable) or 28 V DC

• Max Total Power: 2250 W (3 × 750 W); typical 1500 W (2 × 750 W)

• Max Total Current: 90 A @ 24 V DC

• Redundancy: N+1 parallel, automatic current sharing, fault isolation

• Isolation: 2500 V AC (input ↔ output)

• Protection: Overvoltage, undervoltage, overcurrent, short circuit, overtemperature (module-level)

3.3 Environmental

• Operating Temp: –20 °C to +60 °C

• Storage Temp: –40 °C to +85 °C

• Humidity: 5–95 % RH (non-condensing)

• Altitude: Up to 2000 m

• Vibration/Shock: IEC 60068‑2‑6/27 (industrial)

• Protection: IP40 (when mounted in cabinet)

4. Installation

4.1 Rack Mounting

1. Mount the T8240 into a standard 19” rack using 4 × M5 screws.

2. Ensure ≥100 mm front and rear clearance for airflow.

3. Connect chassis PE ground to system earth (single-point ground).

4.2 Power Pack Insertion (Hot‑Swap Enabled)

1. Remove the T8235 blanking plate from an empty slot.

2. Align the T8231/T8232 with the shelf guides and push firmly until fully seated.

3. Secure the front latch.

4. Repeat for second/third modules (2 units for standard redundancy).

5. Confirm PWR and OK LEDs on each power pack are steady green.

4.3 AC Wiring

• Input: 110 / 240 V AC (auto‑sensing, 50/60 Hz) per power pack (IEC C14 rear connector)

• Cable: 14–18 AWG stranded, 3‑conductor (L/N/PE)

• Redundancy: Dual independent AC feeds recommended (separate circuits)

• Ground: PE to chassis earth; field ground isolated from system ground

4.4 DC Output

• The T8240 backplane automatically distributes redundant 24/28 V DC to the T8100/T8300 I/O backplane.

• No user DC wiring required (internal backplane connection).

5. Front Panel Indicators (on T823x Power Packs)

• PWR (Green): Steady = AC input OK; Flashing = AC input fault

• OK (Green): Steady = TMR health OK; Flashing = Single internal circuit fault

• FAULT (Red): On = Overvoltage / Overcurrent / Overtemperature; Flashing = Isolation fault

• READY (Yellow): On = DC output active and stable

6. Operation & Redundancy

• Normal Operation: 2 or 3 power packs operate in parallel current-sharing mode, load balanced.

• Single Pack Fault: Faulty unit is automatically isolated; remaining packs carry 100 % load (N+1 redundancy).

• Hot Swap: Replace faulty packs online; system remains operational during swap.

• Diagnostics: Voltage, current, and temperature monitored continuously; faults logged to system alarm list.

7. Maintenance & Troubleshooting

7.1 Routine Maintenance

• Quarterly: Inspect seating, latch tightness, LED status.

• Annually: Clean with dry lint-free cloth; check AC cable torque and connections.

7.2 Common Faults

• PWR LED Off: Check AC input (110/240 V AC); reseat module; check circuit breaker.

• FAULT LED On: Overvoltage/overcurrent/overtemperature via diagnostics; reduce load; check for short circuits.

• OK LED Flashing: Single TMR circuit fault; replace at next scheduled maintenance.

• Excessive Heat: Check ambient temperature; verify airflow; clean vents.

8. Safety & Compliance

• Install only in Trusted T8100/T8300 chassis environment.

• Disconnect AC before wiring (except hot-swap replacement).

• Use shielded AC cables; comply with IEC 61000‑6‑2/4.

• Certifications: CE, UL, CSA, IEC 61508 SIL 3, TÜV certified.

9. Ordering Information

• T8240: Trusted 1U Power Shelf (for up to 3 × T823x power packs)

• T8231: 24 V DC, 750 W Power Pack

• T8232: 28 V DC, 750 W Power Pack

• T8235: Power Shield (blanking plate)