
INSTRUCTIONS
DC POWER SUPPLY
PS-12 5
Thank you for purchasing the PS-125 DC
POWER SUPPLY
Icom equipments required 13.8 V DC/25 A 
(Max.). 
Please read these instructions thoroughly 
before operating the PS-125.
PRECAUTION
. The PS-125 is designed for
• RNEVER apply AC voltage that exceeds the
specified voltage for the PS-125 rear panel. 
Excessive voltage could cause a fire or ruin 
the power supply.
• RNEVER expose the power supply to rain,
snow or any liquids.
• RNEVER open the top or bottom covers.
There are no user adjustment points. Opening 
the case may expose you to electric shock and 
incorrect reassembly may cause a fire hazard.
• RNEVER let metal, wire or other objects touch
any internal components through the slits of 
the cases. This will electric shock.
• RCAUTION! The socket-outlet must be near
the DC power supply and must be easily 
accessible.
• RACHTUNG! Die Steckdose muß nahe bei
diesem Gerät angebracht und zugängliich 
sein.
• KEEP the power supply out of the reach of 
children.
• USE the power supply with an Icom equipment 
only. Other brands may have different pin 
assignment.
• USE an AC outlet that can supply more than 
750 VA capacity. AVOID the use of a multi-plug 
adaptor.
• DO NOT use strong cleaning agents such as 
benzine or alcohol. ALWAYS unplug the AC 
cable from the AC outlet, then use a dry soft 
cloth when cleaning the power supply.
• DO NOT place liquids on or near the power 
supply.
• DO NOT place the power supply against walls 
or put anything to behind the power supply. 
This will obstruct heat dissipation.
IMPORTANT!
The connected transceiver may receive switching noise from this power supply depending on 
the antenna used and/or installing conditions, 
etc.
SPECIFICATIONS
• Input voltage : 230 V AC (50/60 Hz)
• Input current : 2.3 A
• Output voltage : 13.8 V DC±5%
• Max. output current : 25 A, 50% duty (1 min. ON/1 min. OFF)
• Dimensions : 111(W)×94(H)×287(D) mm
(projections not included) 4.4(W)×3.7 (H)×11.3(D) in
• Weight (approx.) : 3.0 kg; 6 lb; 10 oz
• Usable temperature range : –10˚C to +40˚C; +14˚F to +104˚F

OPERATION
q Make sure the [POWER] switches on the PS-
125 and other equipment are OFF.
w Connect the DC output cable of the PS-125
to the DC power input socket of the equipment.
e Connect the AC power cable to an AC outlet
and the PS-125.
r Turn the PS-125 ON.
• “ I ” : ON (red indicator lights)
• “O” : OFF (red indicator goes off)
t Turn the connected equipment ON. 
y To turn OFF the system, turn the connected
equipment power OFF, then the PS-125 in 
sequence.
PANEL DESCRIPTION
Power SW
Indicator
POWER PROTECTOR
The PS-125 has an output protection circuit. 
When the + and _ pins are shorted, the PS125 stops functioning. In such a case, remove 
the source of the problem, turn OFF the PS-125, 
wait several seconds, then turn it ON again.
NC
1-1-32 Kamiminami, Hirano-ku, Osaka 547-0003, Japan
+_
A-6003H-2EU-e Printed in Japan
© 2001–2006 Icom Inc.