Component Snapshot At-a-Glance
- Model: Triconex 8307A
- Alt. P/N: 7400127-610
- Product Series: Tricon 8000 Series Power Supplies (Legacy)
- Hardware Type: Dual-redundant AC-DC power supply module
- Key Feature: 230VAC input, dual independent feeds, 24VDC output for remote expansion racks
- Primary Field Use: Delivers isolated, regulated 24VDC to Tricon RXM (Remote Expansion Module) racks in SIS/ESD systems.
Hard-Numbers: Technical Specifications
- Input Voltage: 230VAC ±10%, 50/60Hz
- Output Voltage: 24VDC ±1% regulated
- Power Rating: 175W continuous at 60°C ambient
- Redundancy: Dual independent input feeds, active-active operation
- Isolation Rating: 1500VAC input-to-output isolation
- Operating Temperature: 0°C to +60°C (industrial)
- Protection: Over-voltage, over-current, reverse polarity, surge protection
- EMI Filtering: Integrated high-frequency RFI/EMI filters
- Hot-Swap: Supported for online replacement (redundant pair)
- Weight: 5kg approx.
The Real-World Problem It Solves
Remote I/O racks lack local DC power and rely on long, noisy 24VDC feeds from the main cabinet. Single-point PSU failures take down entire remote safety loops.Where you’ll typically find it:
- Refinery remote ESD I/O racks 500m+ from main SIS cabinet
- Offshore platform fire/gas (F&G) system remote junction boxes
- Power plant BMS turbine skid remote expansion racksThis dual-redundant AC-DC supply eliminates remote power single points of failure and cleans up noisy plant AC power for critical I/O.
Hardware Architecture & Under-the-Hood Logic
This is a self-contained dual-PSU assembly with no reliance on rack backplane power. It converts raw AC to tightly regulated DC locally at the remote rack.
- Two independent 230VAC feeds enter separate EMI filter banks.
- Each feed drives a dedicated AC-DC converter with galvanic isolation.
- Outputs are diode-OR’ed to a common 24VDC bus; one unit fails, the other carries full load.
- Onboard monitoring circuits track voltage, current, and temperature; report faults to the Tricon backplane.
- Status LEDs display input OK, output OK, and fault for each redundant channel.
