The MicroLink Edge 50, an outdoor telecom cabinet rebuilt as a data centre
A 50 kW direct liquid cooled compute cabinet in an outdoor IP55 enclosure, 1,600 by 1,200 by 2,000 mm on a 1.92 square metre footprint. Two doors, two compartments: 900 mm of compute on the left, 700 mm of thermal and power on the right. It connects to three things at a host building: power, network, and the hot water return.
The unit, as designed
Compute is three DGX B200 at 14 kW each plus an inference node, roughly 32U on 19 inch rails, direct liquid cooled through a vertical stainless manifold with CPC Everis quick disconnects. Server depth up to 900 mm, which is what drove the cabinet to 1,200 mm deep and made it a wide squat box rather than a slim telecom cabinet.
Every watt goes onto one liquid bus. Direct liquid cooling takes the chips. An internal air to water fan coil takes the residual convective heat off the VRMs, memory and power supplies, so nothing is dumped into the cabinet air and the IP55 seal is never broken for ventilation. The whole load arrives at one plate exchanger and leaves as roughly 50 kW of hot water at 40 to 50 degrees C into the host building loop.
If the building loop goes away, a three way motorised valve diverts the whole load to a roof mounted dry cooler, oversized to 100 kW so it can run at half fan speed and stay under 50 dBA. Failover is automatic in under five seconds. The host never loses heating because of MicroLink, and MicroLink never loses compute because of the host.
