The Calix E5-121 / MNLC RT-410 Retrofit Kit is designed to upgrade Motorola/Next Level Communications (MNLC) RT-410 outdoor cabinets by integrating Calix E5-121 service units. This retrofit solution allows for the re-use of existing USAM line power input pairs, converting them to a standard -48 VDC power supply for the new Calix E5-121 units. The kit primarily consists of a DC power system and associated cabling, but does not include the E5-121 service units, converter modules, fan tray, or subscriber interface adapter cables, which must be ordered separately.
Function Description:
The core function of the retrofit kit is to provide a new DC power and distribution system within the MNLC RT-410 cabinet. This system aggregates the existing USAM line power inputs and converts them to -48 VDC, which is then distributed to the Calix E5-121 service units. The kit supports the installation of up to four E5-121 units. For cabinets with four existing USAM shelves, at least one USAM shelf must be removed to accommodate the retrofit kit and an E5-121 unit. In configurations with three or fewer USAM shelves, the kit and one E5-121 unit can be installed without removing native equipment. Additional E5-121 units require the removal of corresponding USAM shelves on a 1:1 basis. The retrofit process also involves installing subscriber interface adapter cables (MS² to RJ-21) to connect the existing protection panel cabling to the new E5-121 units. Environmental alarm reporting can optionally be moved to the Calix E5-121 equipment.
Important Technical Specifications:
- Power Input: Re-uses existing USAM line power input pairs (±190 VDC).
- Power Output: Converts to -48 VDC for Calix E5-121 service units.
- Converter Modules: Supports LP ±190 to -48 VDC converter modules (up to 10, ordered separately). Each module terminates up to two power pairs.
- DC Distribution: Integrated DC distribution with 12 GMT fuse-protected positions.
- Fuses: Includes 5A GMT fuses for E5-121 unit distribution (up to 11) and a 1A GMT fuse for the fan tray (1).
- Mounting: 19" mounting panel for the DC power and distribution assembly.
- Fan Tray: Requires a fan tray for the DC converter shelf (ordered separately).
- Subscriber Interface: Utilizes subscriber interface adapter cables (MS² to RJ-21, CAT5 or CAT3 options, ordered separately) for connecting to existing protection panel cabling.
- E5-121 Units: Supports up to four Calix E5-121 service units (ordered separately).
Usage Features:
- Scalability: The retrofit kit allows for flexible deployment, supporting one to four E5-121 units depending on cabinet configuration and service requirements.
- Power Re-use: Leverages existing USAM line power infrastructure, simplifying power integration.
- Modular Design: The DC power system, converter modules, and E5-121 units are modular, allowing for phased installation and maintenance.
- Subscriber Interface Integration: Provides adapter cables to seamlessly connect existing subscriber protection panels to the new E5-121 units. Sequential line mapping is recommended for additional adapter cables to maintain organization.
- Fiber Re-use: Existing USAM transport fibers can be re-used with SC-to-LC fiber jumpers and bulkhead adapters, converting to LC connections for the E5-121.
- Environmental Alarm Integration: Optional connection of the new assembly's alarm cable to cabinet contacts for environmental alarm reporting via the E5-121.
Maintenance Features:
- Fuse Protection: The DC distribution panel includes GMT fuse-protected positions for individual E5-121 units and the fan tray, allowing for isolated power management and troubleshooting.
- Modular Component Replacement: Converter modules are plug-in units, facilitating easy replacement if necessary.
- Fan Tray Accessibility: The fan tray is designed for easy insertion and removal from its housing below the converter shelf, aiding in maintenance or replacement.
- Power Verification: The installation guide emphasizes testing the DC power supply voltage at the E5-121 shelf (between -48 and -54 VDC) as part of the turn-up process, ensuring correct power delivery.
- Service-Affecting Procedure: The installation is identified as a potentially service-affecting procedure, recommending performance during a standard maintenance window to minimize disruption.
- ESD Precautions: Standard Electrostatic Discharge (ESD) precautions are advised to protect electronic equipment during installation.
- Safety Notices: Comprehensive safety notices, including warnings for electric shock and laser radiation, are provided to ensure technician safety during installation and maintenance.
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