Product Type | External Runtime Frame with Battery Modules |
Form Factor | Rack-mountable |
Rack Units | 4U |
Included Battery Modules | 2 x SYBT2 |
Battery Type | Sealed lead-acid, maintenance-free, with suspended electrolyte |
Nominal Input Voltage | 208/240 V AC |
Power Capacity | Dependent on attached UPS system |
Expandable Runtime | Yes (supports additional battery packs) |
UPS Compatibility | APC Symmetra RM UPS systems |
Redundant Battery Support | Yes |
Hot-swappable Batteries | Yes |
Battery Mounting | Integrated in rack unit |
Typical Recharge Time | Less than 3 hours to 90% |
APC SYRMXR2B4 RM4U Rack Mount Ext. Run Frame with 2 SYBT2

Key Benefits

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- Bundled with two SYBT2 batteries, providing immediate extended runtime value.
- TAA compliant and US-manufactured, making it suitable for government and enterprise procurement.
- Space-saving 4U rack design optimizes valuable data center rack real estate.
Product Overview
The APC SYRMXR2B4 RM4U Rack Mount External Runtime Frame comes equipped with two SYBT2 lead-acid battery modules, making it an excellent choice for extending backup power in critical systems. With a 4U rack-mountable design, it saves space while scaling power availability effectively. This unit supports AC 208/240 V input and is TAA compliant, adding value in regulated procurement scenarios. Manufactured in the United States, it underscores adherence to high-quality standards. While it is optimized for use with Symmetra RM UPS systems, detailed output specifications are not provided.
Specifications
Product Overview
Wireless Features
Wi-Fi Support | |
Antennas Included | |
Wireless Frequency Bands |
Compliance & Origin
Country of Origin | United States |
TAA Compliant | Yes |
Certifications | UL 1778, CSA, FCC Part 15 Class A |
RoHS Compliance | Yes |
REACH Compliance | Yes |
Advanced Security Features
Physical Security | Lockable rackmount chassis |
Tamper Detection | None |
Data Protection Features | Battery backup provided via UPS system only |
Interfaces
Interface Type | Proprietary battery connector for Symmetra RM series |
Port Type | DC interconnect cable (to UPS system) |
Communication Interface | UPS handles control/monitoring |
Physical & Environmental
Dimensions (H x W x D) | 6.89 x 17.24 x 28.39 in (175 x 438 x 722 mm) |
Weight | 198 lbs (89.81 kg) |
Operating Temperature | 32 – 104 °F (0 – 40 °C) |
Operating Relative Humidity | 0 – 95% (non-condensing) |
Operating Elevation | 0 – 10,000 ft (0 – 3,000 m) |
Storage Temperature | 5 – 113 °F (-15 – 45 °C) |
Storage Elevation | 0 – 50,000 ft (0 – 15,000 m) |
Sound Level | Whisper quiet (fanless, passive system) |
Enclosure Color | Black |
Mounting Type | 4-post rack mount |
Cloud Management & Licensing
Management Interface | Controlled via host Symmetra RM UPS system |
Network Management Card Support | Available in host UPS only |
APC SmartConnect Compatible | No |
Licensing Required | No licensing required for runtime frame |