APC by Schneider Electric SRT1500RMXLA-NC Smart-UPS On-Line 1500VA 2U Rackmount UPS
Overview
The APC by Schneider Electric SRT1500RMXLA-NC is a 1500VA / 1350W true online double-conversion UPS in a 2U rackmount form factor, built for security infrastructure, network closets, and edge IT environments where any power interruption is unacceptable. Unlike line-interactive or standby topologies, the SRT1500RMXLA-NC conditions power continuously — your connected load never sees raw utility power, which matters when you're protecting NVRs, access control servers, PoE switches, and VoIP systems that don't tolerate even microsecond transfer gaps. If you've had equipment lock up during a brief utility sag, this is the topology that eliminates that problem entirely.
Running on 120V input via a NEMA 5-15P plug with a 6-foot cord, the unit fits standard branch circuits in most commercial server rooms and IDF closets without special wiring. The SRT1500RMXLA-NC (often searched as SRT1500RMXLA NC) ships ready for rackmount deployment in a 3.35" H × 17.0" W × 20.0" L chassis. For buyers evaluating power protection solutions for security and surveillance infrastructure, this unit covers the critical window between utility failure and either load shutdown or generator transfer.
Key Features
- True Online Double-Conversion (1350W / 1500VA): The load runs off the inverter at all times — utility power charges the battery continuously and never reaches your equipment directly. No transfer time on outage, no voltage spikes passed through. For network video recorders mid-write or access control panels mid-transaction, this zero-transfer-time topology prevents data corruption and hardware resets that line-interactive units can still cause during fast sags.
- Six NEMA 5-15R Output Receptacles: Six individually accessible outlets handle mixed loads — a managed PoE switch, an NVR, a fiber converter shelf, and spare outlets for access control hardware or a workstation. No proprietary outlet blocks; standard 5-15R means no adapters needed for typical North American security equipment.
- Runtime: 13.1 Minutes at Half Load (675W), 4.6 Minutes at Full Load (1350W): At a realistic security-closet load of 600–700W (a mid-range NVR plus a 16-port PoE switch), you're looking at roughly 13 minutes of bridge time — enough for an orderly shutdown sequence or generator transfer in most commercial facilities. Full-load runtime of 4.6 minutes is honest: plan your load accordingly rather than over-provisioning on a single unit.
- APC SmartSlot (2 Slots): Two SmartSlot expansion bays let you add a network management card (AP9630 for SNMP/web-based monitoring) or an environmental monitoring module (AP9631 for temperature/humidity sensing) without replacing the UPS. For PoE switch closets or remote IDF locations, SNMP card integration means remote battery health checks, runtime estimates, and graceful shutdown scripting from your NMS — critical for unmanned equipment rooms.
- Serial RJ50 APC Data Port + USB + Simple Signaling: Three interface options cover legacy serial-connected servers (RJ50), modern Windows/Linux hosts (USB HID), and basic relay-signaling for older hardware. The USB path works with PowerChute software for scheduled shutdowns and power event logging without additional licensing.
- Battery Replacement: RBC155 Kit: Field-swappable battery using the standard RBC155 kit means maintenance doesn't require a service contract or UPS swap-out. Hot-swap capability (verify for your specific installation) keeps the load protected during battery replacement — relevant for 24/7 security operations that can't take a planned downtime window.
- Legacy Communications Module Bay (AP9620): The AP9620 slot preserves compatibility with older APC monitoring infrastructure — if your facility already runs legacy APC management software, you're not forced to re-tool your monitoring stack just to deploy this unit.
Integration & Compatibility
The SRT1500RMXLA-NC integrates with the broader APC by Schneider Electric management ecosystem. SNMP management via AP9630 enables integration with SolarWinds, PRTG, Nagios, and other NMS platforms that support standard UPS MIBs. The USB HID interface works natively with PowerChute Business Edition and PowerChute Network Shutdown for VMware, Hyper-V, and Linux environments. Serial RJ50 supports legacy APC PowerChute Plus deployments.
For security integrators building out camera and access control infrastructure, the six 5-15R outlets and 1350W capacity comfortably handle a 16-channel NVR (typically 50–80W), a 24-port managed PoE switch (varies widely by load — budget 150–250W for a partially loaded switch), a fiber media converter shelf, and a network firewall appliance, leaving headroom for future adds. Plan actual load against the 1350W capacity before committing — don't assume the VA rating equals available watts; the 0.9 power factor here means 1350W true delivery, which is clearly specified.
Frequently Asked Questions
Q: What is the output capacity of the SRT1500RMXLA-NC in watts?
A: The SRT1500RMXLA-NC delivers 1350 watts / 1500VA. The 0.9 power factor means the full VA rating converts directly to 1350W of true power delivery — higher than many competing 1500VA units at 0.8 PF.
Q: How long will the SRT1500RMXLA-NC run on battery at a typical security closet load?
A: At half load (675W), runtime is 13.1 minutes. At full load (1350W), runtime drops to 4.6 minutes. A realistic security closet running an NVR plus a partially loaded PoE switch at 600–700W total will land close to the half-load figure — roughly 12–14 minutes of bridge time.
Q: What battery does the SRT1500RMXLA-NC use, and can I replace it in the field?
A: The replacement battery kit is the APC RBC155. Field replacement is supported, which keeps the unit in service without requiring a full UPS swap or a service visit for routine battery maintenance.
Q: Can I add network management or environmental monitoring to the SRT1500RMXLA-NC?
A: Yes. The unit includes two APC SmartSlot bays. The AP9630 card adds SNMP/web-based network management; the AP9631 adds temperature and humidity monitoring. Both install without powering down the UPS (the SmartSlot is a live-insertion slot in this product family).
Q: What input plug and voltage does the SRT1500RMXLA-NC require?
A: The unit uses a NEMA 5-15P plug on a 6-foot cord and runs on 120V input — standard North American branch circuit, no special wiring required.
Q: Is the SRT1500RMXLA-NC compatible with APC legacy monitoring software?
A: Yes. The AP9620 Legacy Communications Module bay preserves compatibility with older APC management infrastructure. The unit also includes USB and serial RJ50 data ports for PowerChute software integration on modern and legacy hosts.
The SRT1500RMXLA-NC sits in a sweet spot for security infrastructure deployments where the load is real but not data-center scale — specifically, the 1350W true online capacity at a 0.9 power factor is what separates this unit from the common 1500VA / 900W (0.6 PF) units that look similar on spec sheets but leave you short when the switch and NVR loads add up.
Technical Highlights:
- 0.9 Power Factor / 1350W True Output: At the same VA rating, a 0.6-PF unit delivers only 900W — 450W less headroom. In a loaded security IDF with a 16-port PoE switch, NVR, and firewall, that gap is the difference between protected and overloaded.
- 13.1-Minute Half-Load Runtime: At 675W — a realistic mid-size security closet load — you have over 13 minutes on battery. That's enough for an orderly generator transfer at almost any commercial facility running a 10–15 second auto-transfer switch.
- Dual SmartSlot Expansion: Two bays means you can run both AP9630 (SNMP management) and AP9631 (temperature/humidity) simultaneously — no trade-off between remote monitoring and environmental sensing, which matters in unmanned IDF closets where thermal events kill equipment quietly.
Deployment Considerations:
- The 2U chassis at 20.0" depth fits standard 4-post racks comfortably, but verify your rail depth before ordering — shallow 2-post relay racks common in older facilities may not support 20" depth without an extension shelf.
- Battery runtime at full 1350W load drops to 4.6 minutes — thin for facilities with slow generator transfer. If your load regularly runs above 900W, budget for a second unit or an external battery pack rather than relying on this unit alone for extended outages.
This unit is well-matched to a mid-size physical security head-end room: an NVR server, a managed PoE switch stack, a network firewall, and an access control panel — all on one protected circuit, with SNMP visibility and field-swappable batteries. It's not sized for a full server room, but for a dedicated security equipment closet serving a 50–200 camera deployment, the SRT1500RMXLA-NC hits the capacity and management feature set that deployment requires.
