Middle Atlantic FWD-CBS-1.5KVA-B27 vs Middle Atlantic OL1500R-8: Specification Comparison
Both the Middle Atlantic FWD-CBS-1.5KVA-B27 and the UPX-RLNK-OL1500R-8 are 1500 VA / 1350 W rack-mount UPS units from Middle Atlantic's portfolio, sized for AV and security rack installations. The comparison pits the CBS Forward series—a line-interactive unit integrated into a BGR 27-inch deep enclosure—against the Nexsys Online unit with individual outlet control and a bundled UPX-RLNK network card. Buyers at the 1.5 kVA tier choosing between these will weigh UPS topology, physical rack footprint, outlet management, and enclosure integration versus standalone deployment.
In This Guide
- Which UPS topology delivers the right level of power conditioning for your load?
- How do the physical size, rack depth, and installation approach differ between these two units?
- What outlet management and remote monitoring capabilities does each unit provide?
- Which should you choose: the FWD-CBS-1.5KVA-B27 or the OL1500R-8?
- Side-by-Side Specs
- FAQ
Which UPS topology delivers the right level of power conditioning for your load?
The FWD-CBS-1.5KVA-B27 uses a line-interactive topology with MOV surge protection. Line-interactive designs regulate voltage via an autotransformer but switch to battery only when input falls outside an acceptable range, meaning the connected load briefly rides on battery during the transfer window. The surge protection type is specified as MOV. Output is rated at 110–127 VAC AC and 48 VDC, with a 1500 VA / 1350 W capacity and a 15 A input on a NEMA 5-15P cord.
The UPX-RLNK-OL1500R-8 uses an online (double-conversion) topology. In an online UPS the load is always powered from the inverter; raw utility power never reaches the output directly. This eliminates transfer time entirely and provides the highest degree of isolation from input power anomalies. It also carries 1500 VA / 1350 W capacity with a 15 A NEMA 5-15P input. Certifications listed include cTUVus and Energy Star 2.0. Topology is the single sharpest differentiator between these two units.
How do the physical size, rack depth, and installation approach differ between these two units?
The FWD-CBS-1.5KVA-B27 is an integrated enclosure product built on Middle Atlantic's BGR platform. Its dimensions are 23 in wide × 7.42 in tall (2 RU) × 27 in deep, and it carries a 1100 lb weight capacity for rack loading. Shipping weight is 145 lbs (65.8 kg). The 27-inch depth figure refers to the enclosure depth the CBS module is designed for. Mounting hardware is included. The unit accepts BGR-series enclosures and is positioned as an enclosure-integrated solution rather than a standalone appliance dropped into an open rack.
The UPX-RLNK-OL1500R-8 is a standalone appliance measuring 19 in wide × 3.5 in tall (1 RU, per the height) × 16 in deep, weighing 44.7 lbs (20.3 kg) with a shipping weight of 52.1 lbs (23.6 kg). It supports four mounting points and accommodates rack mounting depths from 22 in minimum to 34 in maximum. At 16 in deep and 1 RU, it is dramatically shallower and lighter, fitting into a standard 19-inch open rack without any enclosure dependency. These are not interchangeable form factors: the B27 is an enclosure-specific component; the OL1500R-8 is a universal rack appliance.
What outlet management and remote monitoring capabilities does each unit provide?
The FWD-CBS-1.5KVA-B27 does not include a built-in network card. Remote network management is available only with the separately purchased UPX-RLNK-CARD accessory, as noted in the spec ('Network Enabled: with UPX-RLNK-CARD'). Outlet count and number of circuits are listed as spec fields but their values are not populated in the provided specifications. Receptacle type is NEMA 5-15R. No individual outlet control is specified.
The UPX-RLNK-OL1500R-8 bundles the UPX-RLNK network card (indicated by the 'UPX-RLNK' prefix in the SKU and 'Individual' outlet control type in the specs) and provides 8 NEMA 5-15R outlets with individual outlet control. This allows per-outlet sequencing, load shedding, and remote reboot of connected devices. The included network card enables remote monitoring and management without an additional accessory purchase. For deployments requiring granular outlet-level control or remote power cycling, the OL1500R-8 delivers this out of the box.
Which should you choose: the FWD-CBS-1.5KVA-B27 or the OL1500R-8?
Our take: The UPX-RLNK-OL1500R-8 is the stronger choice when power-conditioning quality, outlet-level control, and standalone rack deployment are the priorities. Its online double-conversion topology eliminates transfer time entirely, providing a higher tier of protection than the FWD-CBS-1.5KVA-B27's line-interactive design—a meaningful spec delta for sensitive AV or security equipment. It also weighs 100+ lbs less (44.7 lbs vs 145 lbs shipping) and is 11 inches shallower (16 in vs 27 in), fitting any standard 19-inch rack. Eight individually controllable NEMA 5-15R outlets with a bundled network card are included versus the B27's unspecified outlet count and optional network card add-on. The FWD-CBS-1.5KVA-B27 is the appropriate choice when the UPS must integrate into a Middle Atlantic BGR 27-inch enclosure system, where the enclosure's 1100 lb weight capacity, 2 RU form factor, and enclosure-native installation workflow are the deciding constraints rather than topology or outlet management.
Side-by-Side Comparison
Spec-for-spec, from manufacturer data.
| Specification | Middle Atlantic FWD-CBS-1.5KVA-B27 | Middle Atlantic OL1500R-8 |
|---|---|---|
| VA Rating | 1500 VA | 1500 VA |
| Watt Rating | 1350 W | 1350 W |
| UPS Topology | Line Interactive | Online (Double-Conversion) |
| Surge Protection | MOV | — |
| Input Voltage | 120 VAC | — |
| AC Output Voltage | 110–127 VAC | 110–127 VAC |
| DC Output Voltage | 48 VDC | — |
| Input Amperage | 15 A | 15 A |
| Plug Type | NEMA 5-15P | NEMA 5-15P |
| Receptacle Type | NEMA 5-15R | NEMA 5-15R |
| Outlet Count | — | 8 |
| Individual Outlet Control | — | Yes |
| Network Management | Optional (UPX-RLNK-CARD) | Included (UPX-RLNK) |
| Rack Units | 2 RU | — |
| Dimensions (W × H × D) | 23 in × 7.42 in × 27 in | 19 in × 3.5 in × 16 in |
| Shipping Weight | 145 lbs (65.8 kg) | 52.1 lbs (23.6 kg) |
| Operating Temperature | 32°–104°F (0°–40°C) | 32°–104°F (0°–40°C) |
| Cord Length | 6 ft (1.8 m) | 6 ft (1.8 m) |
| Enclosure Platform | BGR 27 in | Universal rack (22–34 in depth) |
| Certifications | — | cTUVus, Energy Star 2.0, REACH |
Frequently Asked Questions
Which should you choose: the FWD-CBS-1.5KVA-B27 or the OL1500R-8?
The UPX-RLNK-OL1500R-8 is the stronger choice when power-conditioning quality, outlet-level control, and standalone rack deployment are the priorities. Its online double-conversion topology eliminates transfer time entirely, providing a higher tier of protection than the FWD-CBS-1.5KVA-B27's line-interactive design—a meaningful spec delta for sensitive AV or security equipment. It also weighs 100+ lbs less (44.7 lbs vs 145 lbs shipping) and is 11 inches shallower (16 in vs 27 in), fitting any standard 19-inch rack. Eight individually controllable NEMA 5-15R outlets with a bundled network card are included versus the B27's unspecified outlet count and optional network card add-on. The FWD-CBS-1.5KVA-B27 is the appropriate choice when the UPS must integrate into a Middle Atlantic BGR 27-inch enclosure system, where the enclosure's 1100 lb weight capacity, 2 RU form factor, and enclosure-native installation workflow are the deciding constraints rather than topology or outlet management.
Is the FWD-CBS-1.5KVA-B27 or the OL1500R-8 better for protecting sensitive AV or security equipment from power anomalies?
Based on the specified topologies, the OL1500R-8 provides stronger protection. Its online (double-conversion) topology means the load is always powered from the inverter and is completely isolated from utility power irregularities with zero transfer time. The FWD-CBS-1.5KVA-B27 uses a line-interactive topology with MOV surge protection, which does not offer the same level of continuous isolation.
Can I manage either unit remotely without buying extra accessories?
The OL1500R-8 includes the UPX-RLNK network card as indicated by its SKU and specs, enabling remote monitoring and individual outlet control for all 8 outlets out of the box. The FWD-CBS-1.5KVA-B27 specifies 'Network Enabled: with UPX-RLNK-CARD,' meaning a separate UPX-RLNK-CARD purchase is required to add network management capability.
Will the FWD-CBS-1.5KVA-B27 fit in a standard open 19-inch rack?
The FWD-CBS-1.5KVA-B27 is built for Middle Atlantic's BGR enclosure platform with a 27-inch depth and 23-inch width profile. It is not a standard 19-inch appliance. The OL1500R-8, at 19 inches wide, 3.5 inches tall, and 16 inches deep with 22–34 inch mounting depth compatibility, is designed for standard open-rack deployment.
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