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Triconex 8311 Power Supply High Density Module with 27 Amp Maximum Current 6.5 VDC Output
Triconex 8311 Power Supply High Density Module with 27 Amp Maximum Current 6.5 VDC Output
27 Amp Maximum Current Triconex 8311 Power Supply
6.5 VDC Output High Density Module
1500 VDC Isolation DC-to-DC Conversion Stage
Place of Origin:
USA
Brand Name:
Triconex
Model Number:
8311
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Product Details
Country Of Origin:
USA
Estimated Shipping Size:
3x30.2x26.5cm
Weight:
1.2 Kg
Isolation:
>1000 VAC Or 1500 VDC, Input To Output
Input Power Required:
240 Watts Minimum Per Power Module
Output Power:
175 Watts At 140°F (60°C)
Output Voltage:
6.5 VDC, ±1% Under All Operating Conditions
Output Current:
27 Amps Maximum At 140°F (60°C) Ambient
Highlight:
27 Amp Maximum Current Triconex 8311 Power Supply
,6.5 VDC Output High Density Module
,1500 VDC Isolation DC-to-DC Conversion Stage
Payment & Shipping Terms
Minimum Order Quantity
1
Price
66USD
Packaging Details
Brand new and original
Delivery Time
2-3 work days
Payment Terms
T/T
Supply Ability
in stock
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Product Description
The Triconex 8311 functions as a high-integrity DC-to-DC conversion stage specifically for Tricon Main, Expansion, or Remote Expansion (RXM) chassis backplanes. It accepts a wide 24 VDC nominal input (22-31 VDC range) and steps it down to a precision 6.5 VDC output (±1% regulation). Engineered for high-demand safety loops, it sustains a 27 Amp maximum current even under peak thermal loads of 140°F (60°C). This specific output profile is critical for driving the logic-side power requirements of TMR (Triple Modular Redundant) processors and high-density I/O modules where voltage stability is non-negotiable for system uptime.
Electrical resilience is managed through galvanic isolation rated at >1500 VDC (or 1000 VAC), effectively decoupling the sensitive logic core from field-side electrical transients and ground loops. To prevent "nuisance trips" during system startup or high-load switching, the module utilizes a 15-amp time-delay fuse and requires a 240W minimum input to achieve its 175W rated output. Furthermore, a 2.8 ms minimum hold time provides a vital buffer against momentary DC supply dips, ensuring the controller maintains its state and prevents a spurious plant shutdown during transient power fluctuations.
From a maintenance perspective, the 8311 utilizes a high-density form factor (3cm width) to maximize chassis slot availability. The front-panel interface provides immediate hardware diagnostics via five status indicators: PASS, FAULT, ALARM, TEMP, and BAT LOW, allowing for rapid fault isolation within SIL-3 rated environments. Weighing only 1.2 kg and manufactured in the USA, this power module is the standard for fault-tolerant power distribution in critical Emergency Shutdown (ESD) and Fire & Gas (F&G) architectures, balancing high amperage output with rigorous industrial-grade protection.
Technical Specifications & FAQs
Hardware Footprint: Is the 8311 restricted to specific chassis slots?
Negative. The 8311 is a universal power module compatible with Main, Expansion, and Remote Expansion (RXM) chassis. It slides into the dedicated power slots to energize the TMR backplane logic, ensuring a uniform power architecture across the entire SIS (Safety Instrumented System).
Rail Precision: Why is the 6.5 VDC output tolerance so tight (±1%)?
The 6.5 VDC rail is the lifeblood of the internal logic processors. Any deviation beyond ±1% risks parity errors or CPU stalls within the Triple Modular Redundant (TMR) processors. The 8311 holds this regulation across the full 22-31 VDC input range to prevent logic-side brownouts.
Thermal Load: What happens to current capacity at the 60°C limit?
No derating is required. The 8311 is rated for its full 27 Amp output at 140°F (60°C). This is a critical distinction for high-density cabinets where stagnant air can cause standard supplies to throttle current, which would otherwise trigger a system-wide "Fault" state.
Power Ride-Through: Is 2.8ms enough hold-time for industrial use?
2.8ms is the minimum buffer designed to bridge sub-cycle DC jitter or high-speed source transfers. It isn't a UPS substitute, but it effectively "cleans" the power for the logic bus, preventing a spurious trip during minor plant-side electrical transients.
Noise Decoupling: How does 1500 VDC isolation protect the safety loop?
The galvanic isolation acts as a hard barrier between the "dirty" 24V field power and the "clean" logic backplane. It blocks common-mode noise and ground loops--essential for maintaining the SIL-3 integrity of the controller when field-side cabling is exposed to heavy EMI.
Inrush Logic: Why the 15A "Time-Delay" fuse over a standard fast-acting type?
Cold starts on the 8311 involve a massive initial charge of the internal capacitor banks. A fast-acting fuse would blow instantly upon power-up. The 15A slow-blow (time-delay) fuse handles this millisecond-scale inrush while still protecting against sustained overcurrent.
Status Interpretation: How do the LEDs help isolate a "BAT LOW" event?
The BAT LOW indicator is independent of the FAULT LED. If BAT LOW is active, the input voltage from the plant batteries has dipped below the 22V threshold, but the 8311 is likely still functioning. This allows the tech to fix the supply source without needlessly swapping the module.
Efficiency Overhead: Why does a 175W output require 240W of input?
The 65W delta is the "thermal and conversion tax." It covers the internal switching losses, cooling requirements, and the diagnostic monitoring circuitry. Budgeting for 240W per module on the input side ensures the supply won't collapse the plant's 24VDC bus under peak demand.
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Ever feel like you're on a wild goose chase looking for that one specific module while your production line sits idle?
That's where we step in. At Amikon, we don't just "sell parts"--we kill downtime. We've stocked up on the heavy hitters so you don't have to wait weeks for a lead time.
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