1. NetSure 211 C46-S1 Positioning and Electrical Architecture
The NetSure 211 series developed under Emerson Network Power (now Vertiv) stands as one of the most widely deployed ultra-compact embedded DC power platforms across telecommunications edge nodes, RRU/BBU outdoor enclosures, enterprise micro data rooms, and railway signaling stations. Within this legacy lineup, the NetSure 211 C46-S1 subrack occupies a compact 2U height (88 mm) with a standard 19-inch rack mounting width and an approximate depth of 300 mm. It delivers a nominal output voltage of -48V DC (adjustable between -42V DC and -58V DC) and a maximum rated DC output current of 80A (delivering up to 4000W under full rectifier load).
Electrically, the C46-S1 integrates an all-in-one chassis, hot-pluggable high-efficiency rectifiers, a centralized digital controller, and an integrated Power Distribution Unit (PDU). The system supports single-phase 220VAC or two-phase utility power inputs across an ultra-wide voltage window of 85VAC to 290VAC. It features comprehensive transient protection, including standard Class C/D surge protective devices (SPD) capable of handling nominal 20 kA lightning surges.
The front-access distribution bay incorporates physical isolation for battery strings and critical telecom loads with dual-stage disconnects (LLVD and BLVD). Designed to comply with CE, UL, and Telcordia NEBS Level 3 standards, the NetSure 211 C46-S1 is engineered for 24/7 mission-critical operations even in non-climate-controlled edge cabinets.
Rated Power Output: Nominal -48V DC busbar, maximum 80A capacity in a 2U subrack
Utility Grid Tolerance: 85VAC to 290VAC wide AC input range with integrated 20 kA surge suppression
Physical Form Factor: Standard 19-inch rack mount, 2U height (88 mm), 300 mm chassis depth with front-access layout
Safety Certifications: Full compliance with EN 55022 Class B EMC standards and Telcordia NEBS Level 3 reliability criteria
2. Rectifier Slots, Monitoring Compatibility, and PDU Topology
The internal chassis of the NetSure 211 C46-S1 provides four standardized 1U blind-mate rectifier slots and one dedicated controller bay. The rectifier slots accommodate hot-swappable Emerson / Vertiv eSure R48-1000 (nominal 48V 20A 1000W) or high-efficiency R48-1000e3 (peak conversion efficiency 96.2%) modules. Populating all four positions allows the system to deliver up to 80A of high-purity filtered DC electricity, providing robust 3+1 (60A N+1) active redundancy.
System oversight is handled by the integrated M221S (keypad with LED display) or M222S (backlit LCD display) intelligent controller. The monitoring unit interfaces with the rectifiers and distribution sensors over a dedicated high-speed internal bus, providing automated battery charge temperature compensation, online discharge battery capacity evaluation, autonomous current-sharing regulation, shunt-based metering, and dry-contact alarm reporting. Remote network access is supported via RS232/RS485 and optional SNMP network management cards.
In terms of DC distribution, the C46-S1 includes dual battery circuit breakers (such as 2 x 50A or 2 x 63A MCBs), along with multiple high-priority Battery Low Voltage Disconnect (BLVD, for transmission and routing) and low-priority Load Low Voltage Disconnect (LLVD, for baseband power amplifiers) branches. This ensures non-critical loads are shed during prolonged grid outages, maximizing battery backup duration for core traffic.
Rectifier Slot Layout: 4 standardized 1U slots accommodating R48-1000 and R48-1000e3 modules
Supervisory Options: Compatible with M221S and M222S digital controllers
Battery Protection: Integrated dual-stage low-voltage disconnect (LLVD and BLVD) contactors
Front Distribution Bay: Quick-replacement MCB breaker array supporting battery isolation and segmented DC output feeds
3. Legacy Subrack Replacement and Energy Efficiency Upgrades
In network modernization projects, early-generation Emerson power systems like PS4860/25 and PS4860/50 frequently encounter component aging, blocked cooling paths, capacitor electrolyte dry-out, and discontinued spare parts. The NetSure 211 C46-S1 is the recommended form-fit-function replacement for these legacy 2U to 3U subracks, offering exact mechanical bracket alignment and zero-rewiring physical swap capability.
For rectifier upgrades, replacing older legacy units operating at 90% to 91% efficiency with modern eSure R48-1000e3 units elevates system efficiency past 96.2%. This translates into a 40%+ reduction in thermal heat dissipation, easing ambient heat strain inside compact outdoor enclosures and lowering cabinet air conditioning energy demand.
When executing an expansion upgrade from 40A to an 80A fully populated configuration, site engineers must verify the upstream AC circuit breaker capacity (upgrading from 16A/20A to 32A) and incoming cable gauge (minimum 4 mm² to 6 mm²). Shunt scaling factors and total current limits must also be updated in the M221S/M222S controller menu.
Direct Physical Swap: Form-fit-function replacement for Emerson PS4860/25 and PS4860/50 subracks
Efficiency Modernization: Upgrades to R48-1000e3 modules cut thermal losses by over 40%
AC Feed Verification: Expanding to 80A full load requires upgrading AC breaker and cable cross-section
Controller Calibration: Adjust battery capacity ratings and temperature compensation curves post-upgrade
4. Buyer Guide: Identifying Counterfeits and Refurbished Units
Because the NetSure 211 platform is widely traded across secondary telecom markets, buyers often encounter scrapped base station components, repainted chassis, and counterfeit distribution assemblies. Sourcing compromised equipment risks busbar arcing, contactor coil seizure, deep battery discharge, and catastrophic cabinet fires. RICEWIND engineers recommend evaluating units across four critical dimensions:
First, inspect sheet metal stamping and powder coating. Authentic Emerson/Vertiv factory chassis utilize electro-galvanized cold-rolled steel with uniform electrostatic powder coating that resists scratches. Refurbished units often feature spray-painted rusty iron shells with runs, orange peel, and stripped or retapped screw holes.
Second, verify the DC contactors and internal copper busbars. Genuine chassis incorporate certified heavy-duty DC contactors with magnetic blowout arc suppression, paired with thick, high-purity tinned copper busbars. Substandard assemblies substitute undersized copper bars or recycled contactors prone to contact welding.
Third, evaluate the backplane blind-mate connectors. Factory connector blocks use high-spring phosphor bronze gold-plated pins. Counterfeit or aged backplanes frequently display carbon pitting, arcing burns, and fatigued spring fingers that cause intermittent rectifier dropouts.
Fourth, validate traceability barcoding. Authentic NetSure 211 C46-S1 subracks carry tamper-evident barcode labels on the top and side panels. The Serial Number (SN) and Part Number (PN) must align across the outer carton, inspection sheet, and internal chassis.
Chassis Coating Quality: Smooth electrostatic powder coating on cold-rolled steel with no respray signs
Busbar & Contactor Verification: High-conductivity tinned copper and genuine heavy-duty DC contactors
Backplane Pin Condition: Clean gold-plated blind-mate terminals free of arc burns and contact fatigue
Traceability Alignment: Identical SN and PN across subrack labels, test certificates, and factory packaging
5. NetSure 211 C46-S1 Technical Specifications Matrix
To assist power system designers and procurement specialists, the table below summarizes the core engineering parameters of the standard Emerson NetSure 211 C46-S1 subrack system:
During real-world deployment, for constant telecom loads between 20A and 40A, a dual-rectifier setup provides reliable N+1 redundancy. For loads approaching 60A to 80A, fully equipping four rectifier modules is strongly advised to maintain uninterrupted operations during single-module servicing. Battery charging current thresholds should be configured according to connected battery bank capacity (recommended 50Ah to 200Ah VRLA or LiFePO4).
AC Input Specification: Single-phase 220VAC or two-phase across 85VAC to 290VAC range
Rated System Output: -48V DC, up to 80A capacity (approximately 4000W output)
Rectifier Capacity: Up to 4 x 1U slots (R48-1000 / R48-1000e3 series)
DC Distribution Configuration: 2 x battery breakers (50A to 63A) + 2 x BLVD outputs + 4 x LLVD outputs
Operating Temperature Range: -40°C to +75°C (linear derating above +55°C), 5% to 95% RH
6. RICEWIND Quality Testing and Global Logistics Assurance
As an international supplier of mission-critical telecommunications power infrastructure, RICEWIND maintains extensive inventory of genuine new and Grade-A certified subracks, rectifier modules, and supervisory controllers from Emerson, Vertiv, Huawei, ZTE, Delta, and Eltek. Every NetSure 211 C46-S1 subrack undergoes 100% full-function validation in our engineering test labs before shipment:
Our multi-point quality testing includes: 1) Dynamic wide-range AC input voltage stress testing across 85VAC to 290VAC; 2) Continuous 4-hour full-load burn-in at 80A with infrared thermal imaging of all busbars and contact points; 3) Comprehensive M221S/M222S controller verification covering telemetry calibration and alarm relay sequencing; 4) Precise LLVD and BLVD low-voltage contactor disconnect and reconnect calibration; 5) Dielectric withstand and insulation resistance testing complying with 3000VAC / 2120VDC safety criteria. Systems are sealed in anti-static moisture-barrier bags with heavy-duty expanded polyethylene (EPE) foam edge cushioning and crated for international transit via DHL, FedEx, air freight, or ocean container. RICEWIND provides 1 to 3 years of warranty backed by 24/7 dedicated telecom power engineers.
To request NetSure 211 C46-S1 engineering drawings, customized wiring schemes, or wholesale pricing, contact the RICEWIND technical sales team: Email: lee@ricewind.com | Worldwide Mobile: +86 17621197907.
100% Burn-in Qualification: 4-hour continuous 80A full-load test with infrared thermographic inspection
Contactor Logic Verification: Confirmed low-voltage disconnect (LLVD/BLVD) and hysteresis threshold calibration
Dielectric Safety Assurance: Hi-Pot tested at 3000VAC with insulation resistance exceeding 10 Megohms
Heavy-Duty Export Packaging: Moisture-proof sealed enclosure with custom EPE foam cushioning for global transit
Engineering Procurement & Technical Desk
For technical datasheets, custom power topology design, or volume export quotations, reach out to HEFENGQI engineers.
