Computer Cooling System Alphacool 26158 Black 38mm Width 120mm Depth 18mm Height

The Alphacool ES Guardian 4Port Powerfan Hub is a power and monitoring adapter for high-consumption server and industrial fans that cannot be powered directly from standard mainboard headers. It connects to the power supply and provides four 4-pin PWM fan outputs, enabling fan speed monitoring and control via the mainboard. The hub is designed for in-case mounting and includes provisions for additional power if individual fans draw more than 1.5 A (18 W).

Advantages

The Powerfan Hub supplies sufficient current to up to four high-power fans while providing a single 4-pin PWM interface to the mainboard for speed control and monitoring. Individual monitoring can be enabled or disabled using the integrated 4-way DIP switch. A separate power input is available to support fans that exceed the per-channel current limit. Visual status LEDs on the fan connectors and an audible alert option increase fault visibility.

Suitable for

• Server and rack systems with high-power industrial fans
• Workstations or industrial PCs where mainboard fan headers cannot supply required current
• Situations requiring centralised fan monitoring and RPM reporting to the mainboard
• Environments needing audible or visible fan-failure alerts

Key specifications

• Connector type: four 4-pin PWM fan outputs
• Monitoring: RPM signal forwarded from first active monitored fan to mainboard
• Per-fan current support: up to 1.5 A (18 W) per fan without additional power connector; extra power connector provided for higher draw
• Control: 4-way DIP switch for individual monitoring enable/disable
• Additional interfaces: speaker port for piezo buzzer or PC speaker; status LEDs on fan connectors
• Mounting: in-case mounting with M3x4 mm screws and M3x6 mm spacers (mounting hardware referenced in manual)

How to use

Mount the ES Guardian 4Port Powerfan Hub inside the case using the supplied M3 screws and spacers. Connect the hub to the PSU using the included power cable; if any fan requires more than 1.5 A (18 W), attach the additional power connector to the PSU. Plug up to four 4-pin PWM fans into the fan outputs and connect the hub's 4-pin PWM cable to the mainboard fan header. Configure the 4-way DIP switch to enable or disable monitoring for individual fan channels. After connection, the mainboard can read RPM values and control fan speeds via the single PWM interface.

Recommendations

Use the additional power connector whenever a connected fan’s current draw exceeds 1.5 A to avoid overloading the hub or PSU rail. Verify mainboard compatibility with shared PWM/RPM signalling if RPM reporting or fault alerts are required. For audible alerts, connect a compatible piezo buzzer or PC speaker to the speaker port.