Emerson Lorain MHSA20FRM 528948 RET Converter Modification Kit 24V to -48V 20A

Emerson Lorain MHSA20FRM 528948 RET Converter Modification Kit 24V to -48V 20A

This is a new, complete modification kit from Emerson Network Power (Lorain) identified as Kit Spec No. 528948. The kit is a factory-engineered modification of the base 581125000 unit, converting it into a RET (Remote Electrical Tilt) Converter. The MHSA20FRM converter accepts a +24V DC input and produces a regulated -48V DC output at up to 20A — a standard telecom bus voltage used to power remote antenna tilt controllers and other -48V telecom equipment. The kit ships with the converter unit, a multi-conductor wiring harness, assorted cables and connectors, and an Emerson installation manual.

Specifications & What's Included

• Manufacturer: Emerson Network Power (Lorain)
• Model: MHSA20FRM
• Kit Spec No.: 528948 (modification of base unit 581125000 for RET Converter)
• Spec Number: 588250000
• Input Voltage: +21V to +28V DC (nominal +24V)
• Input Current: 52A
• Output Voltage: -48V DC
• Output Current: 20A
• Side panel RF connectors: SMA type — labeled PKE1, DIKE1, PIK IN, DIKE IN, PKE2, DIKE2
• Front panel: green LED status indicator, control/status interface
• Country of Manufacture: Mexico (Emerson Network Power de Mexico)
• Certifications: UL Listed, CE
• Secondary barcode/reference: 468532A....105 M2HA 11 / 9S020518992
• Included in kit:
  • MHSA20FRM converter unit (the main power conversion module)
  • Multi-conductor wiring harness with color-coded leads (red, black, green visible)
  • Assorted cables (yellow and other)
  • Connectors and hardware (bagged)
  • Emerson Installation Manual for Kit Spec No. 528948

Applications

The Emerson Lorain MHSA20FRM is a DC-DC power conversion module used in telecom base station and remote antenna infrastructure. It takes a +24V DC source — common in smaller telecom and wireless equipment shelves — and converts it to the industry-standard -48V DC bus used by a wide range of telecom equipment, including Remote Electrical Tilt (RET) antenna controllers. RET systems allow the vertical beam tilt of a cellular antenna to be adjusted remotely without physical access to the antenna, which is standard practice in 2G/3G/4G base station deployments. The kit form of this product (Spec 528948) was designed to retrofit or upgrade an existing 581125000 base unit in the field, providing -48V power to the RET controller without requiring a full shelf replacement. Emerson Network Power's Lorain product line was a primary supplier of DC power conversion and distribution equipment to the North American telecom industry, and these conversion modules are used in central offices, cell sites, and remote equipment huts. The -48V output is compatible with standard AISG-compliant RET controllers and similar antenna line devices.