Power distribution unit Rittal 7979.436 Managed 3‑phase PDU 30 AC outlets (24×C13, 6×C19) 3 m cable 400 V 16 A

Rittal 7979.436 is a managed three‑phase rack PDU designed for high‑density server cabinets and data centre environments. It provides 30 AC outlets (24×C13 and 6×C19) on a single unit with a 3 m input cable for 400 V nominal voltage and supports up to 16 A per input (maximum power 11,000 W). The unit features per‑outlet energy measurement and monitoring, network management protocols including HTTP/HTTPS, SNMP, Modbus/TCP and OPC‑UA, firmware updates via USB and a compact black housing suitable for vertical 0U mounting in compatible racks.

Advantages

The managed PDU enables precise monitoring and control of individual outlets with measurement accuracy of ±1% (kWh) according to EN 62 053‑21. Colour‑coded phase identification and programmable switching behaviour simplify installation and operation in three‑phase environments. Built‑in functions such as an integral real‑time clock with battery buffering, configurable alarm thresholds, an electromagnetic buzzer for audible alerts and tool‑free mounting options for compatible racks reduce the need for additional accessories and speed up deployment.

Suitable for

• Data centre racks and server cabinets requiring per‑outlet monitoring and remote management
• High‑density IT equipment with mixed C13 and C19 power inlets
• Environments that require secure network access via SNMP, HTTPS or Modbus/TCP
• Installations that benefit from vertical 0U mounting to preserve rack unit space

When it may not be suitable

This PDU requires a compatible three‑phase 400 V supply and a CEE input connector; it is not suitable for single‑phase installations without appropriate upstream conversion. The unit is rated for a maximum input current of 16 A—installations requiring higher continuous current should consider PDUs with higher current ratings.

Key specifications

• Input voltage: 400 V nominal (three‑phase)
• Maximum current: 16 A
• Maximum power: up to 11,000 W
• AC outlets: 30 total (24 × C13, 6 × C19)
• Cable length: 3 m input cable
• Measurement accuracy: ±1% (kWh) to EN 62 053‑21
• Mounting: vertical 0U (tool‑free divider kit for compatible racks)
• Management interfaces: HTTP/HTTPS, SNMP, Modbus/TCP, OPC‑UA; USB for firmware updates
• Colour: Black
• Weight: 5.74 kg

How to use

Mount the PDU vertically in the zero‑U space of a compatible rack or cabinet according to the rack manufacturer’s instructions. Connect the 3 m input cable to the appropriate three‑phase CEE supply and verify phase wiring using the colour coding supplied. Use the web interface, SNMP, Modbus/TCP or OPC‑UA to configure network settings, per‑outlet measurement and alarm thresholds. Program startup and switching behaviour as required and update firmware via the USB port when new releases are available. Regularly review current and voltage measurements and adjust limits to maintain safe operating conditions.

What to consider before purchase

• Ensure rack compatibility for vertical 0U mounting and available zero‑U space
• Verify that site power is three‑phase 400 V and that a compatible CEE inlet is available
• Confirm that a 16 A input rating meets your aggregate load requirements
• Check that remote management protocols provided (HTTP/HTTPS, SNMP, Modbus/TCP, OPC‑UA) meet your monitoring and integration needs

Usage recommendations

Balance loads across the three phases and use the per‑outlet monitoring to set warning and alarm thresholds. Schedule firmware updates during maintenance windows and document configured startup and switching behaviours. For critical loads, combine the managed PDU with appropriate upstream protection and power redundancy to maintain availability.