Black Box LE2720C Dual Redundant Power Supply
Overview
The Black Box LE2720C is a dual power supply unit engineered for network redundancy, delivering failover in under 30 milliseconds — fast enough that connected infrastructure does not register a dropout. If one supply fails, the secondary takes over before most network stacks can time out a packet. That sub-30ms window is the core specification to evaluate against your uptime requirements.
For environments where a momentary power interruption would disrupt active sessions, surveillance recording, or access control operations, redundant power architecture at the device level is a practical safeguard that eliminates the single point of failure a single-supply unit represents. The LE2720C addresses that requirement directly with its dual-supply design.
Black Box is a long-established commercial networking and infrastructure brand. See the broader Black Box catalog for complementary networking infrastructure, or browse power supplies and UPS units for additional redundancy options relevant to your deployment.
Key Features
- Sub-30ms Automatic Failover: The LE2720C switches to the backup supply in under 30 milliseconds — below the threshold at which most network devices register a link drop, keeping sessions alive through a primary supply failure.
- Dual Supply Architecture: Two independent power inputs mean a single supply failure does not take the connected device offline. This is the foundational benefit for any deployment where unplanned downtime is operationally unacceptable.
- Network Infrastructure Focus: Designed for network switching and infrastructure environments where power continuity directly impacts uptime SLAs, not just device availability. Pair with a UPS for full power path redundancy from the wall to the device.
Integration and Compatibility
Consult the Black Box product documentation to confirm which chassis or device models accept the LE2720C as a compatible redundant power supply module. Redundant power supplies are chassis-specific — verify the target platform before ordering. For pre-sales fit guidance, in-house security expertise is available to confirm compatibility against your specific deployment.
Frequently Asked Questions
Q: What is the failover time on the Black Box LE2720C?
A: The LE2720C is rated for failover in less than 30 milliseconds, which is below the threshold at which most network equipment registers a power interruption.
Q: Does the LE2720C provide true redundancy or load sharing?
A: Based on available evidence, the LE2720C provides network redundancy via a dual power supply design. Confirm whether it operates in active/standby or load-share mode by reviewing the Black Box product documentation for this SKU.
Q: Is the LE2720C chassis-specific or universal?
A: Redundant power supplies of this type are typically chassis-specific. Verify compatibility with your target Black Box platform before ordering.
Q: Can the LE2720C be hot-swapped during operation?
A: Hot-swap capability is not confirmed in available evidence. Consult the Black Box datasheet for the LE2720C to confirm whether live replacement is supported.
The single specification that defines the LE2720C's deployment case is its sub-30ms failover window. At that speed, most Layer 2 and Layer 3 network stacks — and the surveillance or access control systems riding on top of them — will not register the supply transition as a link event. That is a meaningful line to be on the right side of when you are designing for continuous availability.
Technical Highlights:
- Sub-30ms Failover: The LE2720C switches between supplies in under 30 milliseconds — below the threshold that triggers session drops or device resets on most commercial network hardware.
- Dual Supply Design: Eliminates the single-supply failure point without requiring an external redundancy module or parallel UPS branch at the device level.
- Black Box Platform Integration: Designed within the Black Box networking portfolio for chassis-level redundancy — not a generic third-party add-on.
Deployment Considerations:
- Verify chassis compatibility before ordering — redundant PSU modules are platform-specific and the LE2720C must be confirmed against your exact Black Box switch or device model.
- Sub-30ms failover protects against supply failure, not upstream power loss — pair with a UPS if your uptime requirement extends to full power path protection.
The LE2720C is the right specification for network closets and IDF/MDF environments where a single failed supply would otherwise require a physical swap under pressure — high-availability surveillance backbones and access control head-end infrastructure being the clearest fit.
