1. Introduction

• Purpose: Extend TMR Expander Bus over fiber (copper ↔ fibre conversion)

• Architecture: TMR‑compatible, three independent “Grey Channel” links

• Safety: Designed for IEC 61508 SIL 3 / SIL 4 systems

• Max Distance: 10 km (single‑mode fiber)

• Data Rate: 100 Mbps

2. Product Overview

• Dual 24 V DC diode‑ORed power inputs (redundant power)

• SC fibre connectors (1 × Tx, 1 × Rx) for single‑mode fiber

• 100 Mbps fibre/copper signal conversion for Expander Bus

• TMR‑safe independent channels (three units per TMR link)

• Low power consumption (max 1.7 W)

3. Specifications

3.1 Mechanical

• Form Factor: DIN‑rail mount module

• Dimensions (H×W×D): 125 mm × 35 mm × 110 mm

• Weight: 0.8 kg (1.76 lbs)

• Mounting: Standard DIN rail (EN 60715)

• Enclosure: Industrial plastic, IP30 rated

• Connectors: SC/PC fibre (Tx/Rx), 6‑pin power, 9‑pin Expander Bus

3.2 Electrical

• Supply Voltage: 20–32 V DC (nominal 24 V DC)

• Power Input: Dual, diode‑ORed (redundant)

• Power Consumption: 1.7 W max

• Copper Interface: Expander Bus (IMB), differential

• Fibre Interface: 100 Mbps, single‑mode

• Transmit Power: ≥ –15 dBm

• Receive Sensitivity: ≤ –28 dBm

• Isolation: 2500 V DC (copper ↔ fibre)

3.3 Fibre Optic

• Fibre Type: Single‑mode (9/125 µm)

• Connector: SC (Subscriber Connector)

• Max Distance: 10 km (depending on link budget)

• Wavelength: 1310 nm

• Link Loss Budget: 13 dB

3.4 Environmental

• Operating Temp: –5 °C to +60 °C (23 °F to 140 °F)

• Storage Temp: –25 °C to +70 °C (–13 °F to 158 °F)

• Humidity: 5–95 % RH, non‑condensing

• Altitude: ≤ 2000 m

• Vibration: IEC 60068‑2‑6 (1 g, 10–150 Hz)

• Shock: IEC 60068‑2‑27 (15 g, 11 ms)

• EMC: IEC 61000‑6‑2 / 6‑4 (industrial immunity)

3.5 Performance

• Data Rate: 100 Mbps (full‑duplex)

• Latency: < 1 µs

• Bit Error Rate (BER): < 10⁻¹²

• Channels: 3 independent (Grey Channel for TMR)

4. Front Panel & Connectors

4.1 Front Panel

• PWR (Green LED): On = 24 V DC OK; Off = No power

• LINK (Green LED): On = Fibre link up; Flashing = Activity

• FAULT (Red LED): On = Link loss / power fault / signal error

4.2 Connectors (Front)

• SC‑Tx: Fibre transmit (to remote Rx)

• SC‑Rx: Fibre receive (from remote Tx)

4.3 Connectors (Rear)

• PWR: 6‑pin terminal block (24 V DC, redundant)

• IMB: 9‑pin D‑sub (Expander Bus copper interface)

5. Compatibility & System Architecture

5.1 Compatible Controllers

• T8100: Trusted Processor Chassis

• T8400: Trusted Controller Chassis

5.2 Compatible Expander Modules

• T8310: Expander Processor

• T8311C: Expander Interface Module

• T8312‑4 / T8312‑7: Expander Adaptor Units

5.3 Compatible Expander Chassis

• T8300: 6U Expander Chassis (14 I/O slots)

5.4 System Topology (TMR)

• Local End: T8311C → T8312 → 3 × T8314 (copper → fibre)

• Fibre Link: 3 × single‑mode fibres (10 km max)

• Remote End: 3 × T8314 (fibre → copper) → T8312 → T8300

6. Installation

6.1 DIN‑Rail Mounting

1. Clip T8314 onto standard DIN rail (top‑first, then bottom).

2. Push down until latch clicks (secure).

3. Mount in a well‑ventilated area (avoid direct sunlight/heat sources).

6.2 Power Wiring

1. Connect 24 V DC to the PWR terminal block (redundant inputs).

2. Use 18–22 AWG stranded wire; torque terminals to 0.5–0.6 Nm.

3. Verify PWR LED is ON after power‑up.

6.3 Copper (IMB) Connection

1. Connect one end of TC‑301 copper cable to the IMB D‑sub on T8314 rear.

2. Connect the other end to T8312‑4 / T8312‑7 ODU port.

3. Tighten D‑sub screws (hand‑tight only).

6.4 Fibre Connection

1. Clean SC fibre connectors with lint‑free cloth + isopropyl alcohol.

2. Insert Tx fibre into SC‑Tx port; Rx fibre into SC‑Rx port.

3. Push until click (positive lock).

4. At remote end, mirror the connection (Tx ↔ Rx cross).

5. Verify LINK LED is ON (steady) after 10–30 seconds.

6.5 TMR System Installation

• Repeat installation for three T8314 units (local) and three T8314 units (remote).

• Ensure fibre cables are routed separately (no bundling) for Grey Channel isolation.

7. Operation & Diagnostics

• Power‑up: PWR LED ON; LINK LED flashes during sync (10–30 s).

• Normal Operation: PWR + LINK LEDs steady GREEN; FAULT LED OFF.

• Fault Conditions:

  • FAULT ON: Fibre link loss, power failure, or signal error.

  • LINK Flashing: Fibre activity (normal during data transfer).

• Diagnostics: Faults logged to main system HMI; LEDs provide local status.

8. Maintenance & Troubleshooting

8.1 Routine Maintenance

• Quarterly: Check LED status; inspect fibre connectors for dirt/damage.

• Annually: Clean SC connectors; verify DIN rail and wiring tightness.

8.2 Common Issues

• PWR LED Off: Check 24 V DC supply; verify redundant wiring.

• LINK LED Off: Clean SC connectors; check fibre continuity; swap Tx/Rx.

• FAULT LED On: Replace T8314; inspect fibre for breaks/bends.

• Intermittent Link: Check fibre bend radius (min 30 mm); re‑seat connectors.

9. Safety & Compliance

• Install only in Trusted T8000 SIS environments.

• Comply with IEC 61508 SIL 3 / SIL 4 system requirements.

• Use only single‑mode 9/125 µm fibre; avoid multi‑mode.

• Certifications: CE, UL, CSA, ATEX II 3G Ex ec IIC T4 Gc, IECEx.