Vertiv Liebert PSI5 Lithium 1100VA Short Depth 2U Rack/tower W/RDU120 120V - PSI5-1100SRT2ULIN

Vertiv PSI5-1100SRT2ULIN 1100VA Lithium-Ion 2U Rack/Tower Line-Interactive UPS

Overview

The PSI5-1100SRT2ULIN is a 1100VA/990W line-interactive UPS from Vertiv's Liebert PSI5 Lithium-Ion series, built for edge computing closets, distributed IT nodes, and compact equipment rooms where rack space is tight and runtime reliability matters. At 11.81 inches deep, the short-depth 2U chassis fits shallow wall-mount enclosures and 2-post telco racks that standard-depth UPS units won't clear — a practical advantage for remote IDF closets and surveillance equipment rooms running UPS power protection. Lithium iron phosphate (LiFePO4) chemistry extends battery service life well beyond conventional VRLA units and eliminates the performance derating typically seen above 77°F — the unit operates full-rated to 104°F (40°C), which matters in unconditioned closets. Pure sine wave output at 0.9 power factor (990W true watts) protects active PFC power supplies in servers, NVRs, and managed switches from the stepped waveforms that approximate sine wave UPS units produce. Automatic voltage regulation (AVR) corrects sags and swells across a 75–150VAC input range without switching to battery, preserving battery cycle life. Six NEMA 5-15R outlets split into programmable segments let you sequence load shedding — cut non-critical loads first while keeping core network or video recording gear alive longer. Runtime is 20 minutes at half load (495W) and 9 minutes at full 990W, supporting graceful shutdown sequences for edge workloads. The included Liebert IntelliSlot RDU120 network management card provides SNMP and web-based monitoring out of the box — no separate card purchase required. A gravity-sensing LCD rotates its display automatically when the unit is converted between rack-horizontal and tower-vertical orientations. The hot-swappable battery allows replacement under load, and the 5-year manufacturer warranty includes the battery with next-day advanced replacement delivery. Energy Star certified and listed to UL 1778 5th Edition and UL1973 3rd Edition. Weight is 18.5 lbs (8.4 kg).

Compatibility

The PSI5-1100SRT2ULIN is compatible with any 120VAC load drawing up to 990W with NEMA 5-15P plug connections. It pairs directly with network video recorders, PoE switches, edge servers, and access control panels in compact rack deployments. The 2U form factor integrates into standard 19-inch EIA racks (2-post and 4-post) and supports wall-mount installation for zero-footprint closet builds. The IntelliSlot RDU120 card communicates with Vertiv's Liebert management ecosystem and third-party SNMP-capable platforms. EPO (Emergency Power Off) terminal support integrates with facility-level shutdown systems. USB connectivity enables direct connection to a host server for graceful OS shutdown via compatible UPS software. Output voltage is field-selectable at 100, 110, 115, or 125VAC to match load requirements.

Installation Notes

The 11.81-inch depth (300mm) is the critical fit dimension — confirm rack or enclosure clearance before ordering; standard 24-inch rack depth accommodates this unit with cable management room to spare, but sub-300mm wall enclosures will not. Input plug is NEMA 5-15P; the circuit must be rated for the full 1100VA inrush plus any other loads on the branch. EPO wiring requires a normally-open dry-contact connection to the rear-panel EPO terminal. The outlet segments are programmable via the front LCD or RDU120 web interface — configure load priority sequencing before commissioning. Gravity-sensing display orientation is automatic; no manual adjustment required when transitioning between rack and tower deployment.