The PDU0003F3V3 product has been designed to operate in conjunction with Kaelus TMA0004. The PDU distributes power for up to six Tower Mounted Amplifiers and provides alarm indications through LED and output relay connections.


  • 22V through 60 V DC input range
  • Up to six +12V DC LNA output ports
  • LED status indicators for each individual TMA
  • TMA summary relay alarm output
  • 19 inch rack mounting

technical specifications
Voltage requirement Any polarity, 22 - 60V
Maximum input current 3A
Input protection Fuse (slow blow)
Output voltage 12V nominal
Output voltage tolerance 10.8V minimum, 12.8V maximum
Operating current window 250-350mA per DC output
alarm and led indicators
Individual TMA status LED's (6x) green Power on, TMA OK, (TMA is powered)
TMA status (6x) amber, red, orange, off See Alarms Window Table
PDU Input power status green PSU OK
PDU Input power status red PSU FAIL
Input-output isolation 500V DC
Alarm sense De-energized on TMA FAIL, PSU FAIL or power off
Alarm relay contact rating 0.5A @ 60V DC
alarm operation
Upon a manual reset of the front panel switch the PDU measures the current flow in each of the DC outputs and if the current falls between an upper and lower limit of a valid operational current range then the TMA is permanently powered. However, an output will be disabled if an open circuit (no TMA connected) or short circuit (installation fault) is detected. Once a TMA is operational, a significant change in operating current is detected by the PDU and causes alarm states to be raised according to the table below. Current operating windows are factory calibrated to suit the TMA with which the PDU is intended to work.
TMA current (mA) Status LNA Indicator LED
>350mA (upper limit) LNA faulty voltage removed Red constant
250 - 350mA LNA OK and operational Green constant
< 250mA (lower limit) LNA faulty voltage removed Red constant
Dimensions H x D x W 441.8 x 91.8 x 44mm | 17.39 x 3.61 x 1.73in
Weight 1kg | 2.2lbs
Mounting 19 inch rack mounting
DC OUT connector Molex mini-fit junior 2-way
DC IN connector Molex mini-fit junior 2-way
Alarm connector D25 (F)
Temperature range -20ºC to +60ºC | +4°F to +140°F, indoor
Lightning protection Varistor, transzorb network per output
MTBF >400,000 hours at 22ºC / 71.6ºF
ordering information
Part Number Description
PDU0003F3V3 6-Way High Current Power Distribution Unit (PDU)
standard cables supplied
R18-0398 Power cable, 6 meters, molex to open tail
R18-0399 Alarm cable D25 to open tail wired for summary alarm
optional accessories
Part Number Description
R92-K0024 Mounting bracket kits
DCI0001F1Vx DC Inserter/Bias T kit
R18-0492 Earth cable 1 meter
R18-0526 Power cable, 10 meters, (molex to open tail)
electrical block diagram
mechanical block diagram