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Radio Power Adaptor


The Merlin-2™ receives input from a variety of AC and DC power sources. Its primary function is to power the radio system.

Additionally, it integrates with BX-XX90 batteries contained within the radio battery box and provides efficient battery charging. In all cases when a rechargeable battery is available, it serves as a UPS for the radio.

Weight 1.03 kg
Dimensions (LxWxH) 283.7 mm x 60.7 mm x 82.8 mm
Input Connector MS3114-E8-4P
Output Connector MS3114-E8-4S
Radio Connector SC-C-179492
Environmental MIL-STD-810, MIL-STD-461
Operating Temperature  – 40°C to + 55°C
Storage Temperature  – 50°C to + 71°C
Input Voltage  10 – 42 VDC @ 14.5 ADC (max)
Input Power 250 W
Radio Power 26 VDC @ 3.5 ADC nominal (100 W max)
Output Voltage 12 or 24 VDC @ 5 Watts for Powered Speakers
12 – 32 VDC @ 4 ADC for Aux Outputs (100 W max)
Efficiency 97%
Li ion Battery Charge Time 3 hours typical


Iris Part Number Part Description
78535-101296  Merlin-2™ RPA Kit
78535-104901  Merlin-2™ RPA Power Module
78535-102040 Input, Converter, AC/DC 220W
78535-102018 Cable, Input, NATO
78535-102203 IEC-320 Power Cord
78535-101616 Case, Hard
78535-102017 Cable, Input, AUTO
78535-102019 Cable, Input, SAEP
78535-102020 Cable, Input, EXTN
78535-102021 Cable, Input, ZINC
78535-102022 Cable, Input, CLMP
78535-102024 Cable, Output, EXTN
78535-102025 Cable, Output, AUTO
78535-102026 Cable, Output, PANA
78535-102028 Cable, Output, SPKR
78535-102049 Solar Panel, 62 W
78535-102030 Cable, Input, Splitter
Features Benefits
Use two standard, full size rechargeable batteries
  • No reduction in runtime when powered from batteries
  • Uses BB-2590/U (preffered) or BB-390B/U (alternate) batteries
  • Programmable charging algorithms ensure future battery chemistry adoption
Uses existing battery box
  • No tools required for installation or use
  • Keeps system environmentally sealed
Battery Hot Swap
  • Able to change – out battery and recharge batteries without power interruption to the radio or crypto-fill loss (when powered externally)
Compact size and weight
  • Lightweight and easy to transport
  • Slice design enables compact integration between the radio and battery box
Functions with a variety of input and output accessories
  • Operates using a wide range of input sources including: Solar, NATO, AC/DC, Zinc-Air batteries, BB-XX90, fuel cell and vehicle power
  • Outputs power to a variety of accessories including speakers, laptop computer and small personal electronics
Also compatible with AN/PRC-138, AN/PRC-150 and AN/PSC-5D radios
  • Multi-Band Multi-Mission Radio (MBMMR) Systems
  • Only need one system for UPS capability