Vertiv Rpdu Switched Outlet Level Monitoring EC 20A 120V 1.9KW Horizontal (12) NE - VP7N21A1

Vertiv VP7N21A1 Switched Outlet-Level Monitoring rPDU — 20A 120V Horizontal

Overview

The Vertiv VP7N21A1 is a 1U horizontal rack PDU built for data center managers and IT architects who need per-outlet switching control and real-time current, voltage, and power monitoring on a 20A/120V circuit. With 12 NEMA 5-20R outlets, a NEMA L5-20P input plug, and a full enterprise network stack including SNMP v3, LDAP, RADIUS, TACACS+, and Modbus TCP, the VP7N21A1 integrates directly into infrastructure management workflows without requiring a third-party monitoring overlay. The built-in LCD display lets technicians read load at a glance without logging into a management interface — a small convenience that matters during high-pressure maintenance windows.

Key Features

• Per-Outlet Switched Control: Each of the 12 NEMA 5-20R outlets can be individually powered on, off, or sequenced — which means controlled boot ordering for servers or remote power cycling of a locked-up device without dispatching hands to the rack. That capability alone can offset hours of remote hands costs in a colocation environment.
• Outlet-Level Current, Voltage, and Power Monitoring: The VP7N21A1 tracks current, voltage, and power at the outlet level — not just at the PDU input. You can pinpoint which device is drawing how much, catch capacity creep before a breaker trips, and pull historical load data for capacity planning. Input-only monitoring forces you to guess; outlet-level monitoring gives you actual utilization per load.
• 20A / 120V Input via NEMA L5-20P: Wired on a 20A circuit, this PDU operates within the 80% continuous-load rule at 16A (roughly 1.9 kW). Size your upstream breaker accordingly — running 12 devices that aggregate above 16A sustained will trip the circuit. The L5-20P plug ensures dedicated circuit termination; standard 5-20 receptacles won't accept this plug, so accidental connection to an underrated circuit is physically prevented.
• LCD Display: The onboard LCD provides local load visibility without a laptop or KVM. For dense colos where walking the aisle with a phone browser is impractical, the display is a real operational benefit during power audits or troubleshooting.
• SNMP v1/v2c/v3 + Full Enterprise Protocol Stack: SNMP v3 means encrypted, authenticated polling — compatible with every major DCIM and NMS platform. Support for LDAP, RADIUS, and TACACS+ means you integrate user authentication into your existing directory rather than managing a local credential store on each PDU. SSH rounds out secure remote access. HTTP/HTTPS, NTP, SMTP, and Syslog are all present for alerting and time-synced logging.
• IPv4 and IPv6 Dual-Stack Networking: Both IPv4 and IPv6 are supported natively, so the VP7N21A1 deploys into modern dual-stack data center networks without NAT workarounds or firmware upgrades. One RJ-45 Ethernet port handles all network management traffic.
• Modbus TCP Support: Modbus TCP allows integration with building management systems (BMS) and industrial monitoring platforms that don't speak SNMP. Relevant in edge deployments or mixed IT/OT environments where your SCADA or BMS already aggregates power data.
• RS-232 Serial Console Port: The single serial port provides out-of-band management access and is also used for connecting environmental sensors (temperature/humidity probes are common Vertiv accessories) — extending monitoring beyond electrical load to ambient conditions in the rack.
• USB Port: The USB port supports firmware updates and local configuration — useful in air-gapped deployments where network-based firmware delivery is restricted by policy.
• 3-Meter Power Cord: The 3m (approximately 10 ft) input cord gives enough slack to route from the PDU's horizontal mount position to the floor PDU or power panel without tight bends. In a standard 42U open-frame rack with power panels at the bottom, 3m is typically sufficient; verify your run length before ordering if your panel is more than 8 feet from the PDU mount position.
• Horizontal 0U Mounting: The VP7N21A1 mounts horizontally in the rack, occupying a 1U equipment slot rather than routing vertically up a side rail. This layout suits installations where side-rail vertical PDU mounting is already claimed, or where the horizontal position aligns with cable management practices in the rack design.

Integration and Compatibility

The VP7N21A1 connects to any standard network switch with a 10/100 Ethernet port via its RJ-45 management interface. SNMP v3 MIBs are available from Vertiv for integration with infrastructure management systems, NMS platforms, and DCIM tools. LDAP/Active Directory, RADIUS, and TACACS+ authentication let you fold PDU access into existing enterprise identity management rather than maintaining local accounts. The Modbus TCP interface bridges into BMS and SCADA platforms. For organizations deploying UPS and power infrastructure from Vertiv, the VP7N21A1 fits cleanly into a unified power monitoring architecture. Pair with compatible environmental sensors via the serial port to extend rack monitoring to temperature and humidity. Review the full PDU category for alternative current ratings, outlet counts, and form factors within the Vertiv rPDU line.

Frequently Asked Questions

Q: What is the maximum continuous load for the VP7N21A1?

A: The VP7N21A1 is rated 20A at 120V (1.9 kW). Under NEC 80% continuous load rules, the recommended maximum sustained load is 16A (approximately 1.92 kW). Avoid sustained loads above 16A on a 20A circuit.

Q: Does the VP7N21A1 support SNMP v3?

A: Yes. The VP7N21A1 supports SNMP v1, v2c, and v3. SNMP v3 provides encrypted, authenticated polling and is the recommended configuration for enterprise deployments.

Q: Can I control individual outlets remotely on the VP7N21A1?

A: Yes. The VP7N21A1 is a switched PDU with outlet-level control. Each of the 12 NEMA 5-20R outlets can be independently switched on or off and sequenced via the network management interface.

Q: What input plug does the VP7N21A1 use?

A: The VP7N21A1 uses a NEMA L5-20P locking input plug on a 3-meter cord. This requires a NEMA L5-20R receptacle on your power panel or transfer switch.

Q: Does the VP7N21A1 support IPv6?

A: Yes. The VP7N21A1 supports both IPv4 and IPv6 natively on its single RJ-45 Ethernet management port, making it compatible with dual-stack data center network environments.

Q: What authentication protocols does the VP7N21A1 support for user management?

A: The VP7N21A1 supports LDAP, RADIUS, and TACACS+ for centralized authentication, allowing integration with Active Directory and other enterprise identity platforms without maintaining local credentials on the PDU.

Eden Phillips

The VP7N21A1 is the rPDU I recommend when a customer needs outlet-level switching control and doesn't want to run a separate monitoring overlay to get per-outlet power data. The fact that it tracks current, voltage, and power at each of the 12 NEMA 5-20R outlets — not just at the PDU input — is what separates this unit from a basic metered PDU and makes it worth the additional cost in environments where capacity utilization actually matters.

Technical Highlights:

• SNMP v3 with LDAP/RADIUS/TACACS+: Encrypted SNMP polling plus directory-integrated authentication means this PDU drops cleanly into enterprise security policy — no local credential sprawl across dozens of PDUs in a large data hall.
• Modbus TCP: Often overlooked, this protocol lets the VP7N21A1 report into BMS and SCADA systems alongside mechanical systems. In edge or hybrid IT/OT deployments, that single protocol support can eliminate a monitoring gap that pure-IT PDUs leave open.
• 20A NEMA L5-20P Input / 1.9 kW: The locking L5-20P plug prevents casual mis-connection to a standard 15A or 20A duplex receptacle. Budget your load at 16A sustained — the 80% rule isn't optional guidance, it's the threshold before you're running outside the circuit's design envelope.

Deployment Considerations:

• The 3-meter input cord is adequate for most standard rack layouts, but measure your run to the L5-20R receptacle before ordering — there's no field-extension option on the input side without a whip assembly, and a short cord on a fully cabled rack is an operational nuisance.
• The single serial port doubles as a sensor port for environmental probes. If you plan to attach a temperature/humidity sensor AND use serial console access simultaneously, you'll need to choose — there's only one port.

Best fit for colocation operators and enterprise data center teams managing 20A/120V circuits who want switched outlet control, outlet-level power visibility, and enterprise-grade authentication in a single horizontal unit — specifically in racks where vertical PDU space is already allocated and a 1U horizontal position is the available real estate.