2
7
Installing the CP4S-DPM-BEC
Note:
Use the CP4S-DPM-BEC if your ESC is
equipped with a Battery Eliminator Circuit (BEC)
and
You
do not need
optical isolation to prevent inter-
ference from propagating back into the receiver.
1. Disable the ESC’s cutoff, or set the cutoff to a
value well below 3V/cell.
2. Connect components (see drawing at right):
a. Attach the ESC’s throttle connector to the
Cellpro 4s DPM’s Throttle Output connector.
b. Attach the DPM’s Throttle Input connector
to the receiver’s throttle channel.
c. If you purchased the optional LED/Speaker
Module, plug it into the DPM.
d. Connect the Cellpro Battery Pack to the
ESC.
CAUTION:
Do not install an on/off switch in the
battery negative (black) wire. You can install an
arming switch in the battery positive (red) wire.
However, remove power by disconnecting the
battery from the DPM.
Capacitors, connectors and arcing
FMA recommends connecting the Cellpro 4s DPM
to the ESC using mating Deans Ultra connectors.
Noise reduction capacitors at the motor draw ex-
tremely high currents when battery voltage is applied
to the ESC. This current typically causes arcing
at the pins of the connector completing the circuit.
Here’s the correct procedure for powering up the
ESC:
1. Disconnect the Deans Ultra connector between
the Cellpro 4s DPM and the ESC.
2. Connect the Cellpro Pack to the Cellpro 4s DPM.
3. Connect the Deans Ultra connector to complete
the circuit. Arcing may occur at this connector.
While this procedure doesn’t eliminate arcing, it as-
sures that it happens at the Deans Ultra connector.
Eventually, repeated arcing will degrade the connec-
tor and you’ll need to replace it. That’s not a bad
thing, as the Deans Ultra is both inexpensive and
easy to replace.
–
+
Receiver
Throttle
1s to 4s
Cellpro
Battery Pack
Throttle
signal
Receiver and
servo power
Cellpro 4s DPM
CP4S-DPM-BEC
Gnd pin
(black)
Optional
LED/Spkr
Module
Throttle
signal
Receiver and
servo power
* Disconnect pack
when not in use.
Leaving pack
connected to DPM
will slowly discharge
pack.
ESC
with BEC
Motor
Driving a motor with Cellpro Packs in parallel
For higher capacity, connect any number of Cellpro Packs in parallel, as shown below. This
example shows CP4S-DPM-OPTOs, which need a separate battery to power the receiver and
servos.
Receiver
Throttle
Battery
Receiver
battery
Throttle signal
Cellpro 4s DPM
CP4S-DPM-OPTO
Ground pin
(black wire)
Optional
LED/Speaker
Module
Opto-isolated
throttle signal
Opto-isolated
throttle signal
Motor
Cellpro 4s DPM
CP4S-DPM-OPTO
FMA CMP-HC-5
Parallel Connector Module
Receiver and
servo power
1s to 4s
Cellpro
Battery Pack
1s to 4s
Cellpro
Battery Pack
–
+
ESC with
opto-isolated
throttle circuit
