34
Connect Your KPC-3 Plus to a Power Source
As illustrated on the right side of the station cabling diagram on page 33, there are three
ways to supply power to your KPC-3 Plus.
You may use external power by connecting the KPC-3 Plus to a 12 V dc source
on your bench
You may use external power by connecting the KPC-3 Plus to a 120-V ac power
source using a 12-V dc adapter. Or use a 230-V ac 50-Hz to 12-V dc adapter if
your mains are such.
You may use internal power by installing a 9-V battery inside the KPC-3 Plus (as
explained below, before doing this you need to install a battery clip (pig tail)
inside your KPC-3 Plus).
See Appendix E for the allowed range of voltage inputs.
The steps needed for each way to supply power to the KPC-3 Plus are given below,
along with detailed specification for each part needed. Of course, the parts you need
depend on which option(s) you use.
The KPC-3 Plus ships with LEDs ON, so the Power indicator (LED) will turn ON
when power is ON. If the LED value has been switched to OFF, the Power LED will
just blink once, briefly, when power is applied.
External Power from Your Bench (12 V dc)
Here, you will use a 2.1-mm power plug and 18-22 gauge stranded 2-conductor cable to
connect to a 12-V dc power supply on your bench. The steps are:
Step 2. Build a cable by attaching the supplied 2.1-mm power plug to a user-supplied
18-22 gauge stranded 2-conductor cable—connecting the center of the jack
to the positive terminal of the power supply and the shell of the power jack to
the negative terminal of the power supply,
Step 3. (1) Turn OFF all power, (2) attach one end of the bench-power cable to a 12-
V dc power source on your bench, and (3) plug the 2.1-mm power plug into
the ―Power‖ connector of the KPC-3 Plus,
Step 4. Turn ON the power supply, (2) press the power switch on the front panel of
the KPC-3 Plus to turn your KPC-3 Plus ON, (3) confirm that the power
indicator next to the power switch goes on, and then (4) press the KPC-3
Plus‘ power switch again to turn the power OFF.
If the power indicator (LED) does not go on as expected, check to be sure the
wiring is correct. If you have checked the wiring carefully and the power indicator
still does not go on as expected, check or replace any fuses in line between the
power supply and the KPC.
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