Legrand Raritan iX Rack-PDU 0U with 12xC13 / 12xCX, single-phase 100-240V 16A, Input Metered RCM (PX4-13A8C-C8E7M27A0)

RCM residual-current measurement in Rack PDUs — more safety for professional data centers

Modern data centers face growing demands for operational safety, regulatory compliance, and proactive fault management. The Legrand Raritan iX Rack PDU 0U (PX4-13A8C-C8E7M27A0) takes a decisive step beyond conventional metered PDUs with its integrated RCM residual-current measurement: it continuously monitors leakage currents on the input feed, detects creeping insulation faults early, and thus enables preventive maintenance measures — before failures or safety risks occur. In combination with billing-grade energy metering (class 0.5) and full remote management, the PX4-13A8C-C8E7M27A0 provides comprehensive safety and energy management for demanding IT infrastructures. The 24 outlets (12x C13, 12x Cx) with mechanical outlet locking reliably power mixed IT loads, while the vertical 0U form factor does not consume rack height units. The precise detection of harmonics, voltage sags, neutral conductor current and crest factor provides a complete data basis for assessing power quality.

In which environments is RCM in rack PDUs particularly recommended?

The RCM function is particularly valuable in environments with high requirements for electrical safety and regulatory compliance: colocation data centers where operators must provide customers with proof of the safety of the power infrastructure, safety-critical IT environments in finance, healthcare and government, and installations that must meet the requirements of IEC 62020 or similar standards. The Legrand Raritan PX4-13A8C-C8E7M27A0 complements the 24-outlet configuration (12x C13, 12x Cx) with this safety-relevant monitoring function without limitations in outlet density or management convenience. By continuously monitoring leakage currents, operators can identify potential hazards before they lead to critical incidents. This not only reduces the risk of unplanned downtime but also helps ensure compliance with regulatory requirements and internal safety policies in sensitive IT environments.

How does the RCM variant differ from the standard input metered PDU?

The Legrand Raritan PX4-13A8C-C8E7M27A0 and the PX4-13A8C-C8E7A0 share the same hardware base — vertical 0U form factor, 24 outlets, billing-grade metering and PDU linking. The decisive difference lies in the additional RCM monitoring of the M27 variant: while the standard version records energy and power data, the RCM variant additionally detects differential currents and issues alerts when defined thresholds are exceeded — a decisive advantage for operators who require active electrical safety monitoring in their rack or data center beyond mere energy transparency. The hot-swappable controller enables uninterrupted maintenance, while dual Gigabit Ethernet with optional Wi‑Fi ensures a redundant network connection. PDU Linking allows central management of up to 8 PDUs, and cascading of up to 32 devices via a single Ethernet port provides a scalable, IP-efficient infrastructure. All measurement data are available in real time to DCIM systems and automated monitoring platforms via Redfish API, SNMP v3, MODBUS‑TCP and JSON‑RPC. The maximum operating temperature of 60 °C at full load confirms the suitability of the PX4-13A8C-C8E7M27A0 even for thermally demanding environments. CE and UL certification ensure compliance with international safety standards and facilitate global deployment. Automated provisioning via TFTP, DHCP and USB flash drives significantly speeds up commissioning of new PDUs and minimizes manual configuration effort. Data logging via HTTP/S or MQTT enables complete documentation of all measurements — including RCM data — for compliance evidence, energy audits and internal safety reports. The iOS and Android apps additionally provide mobile access to measurements, alarms and configuration settings, so administrators can keep track of the power infrastructure even while on the move.