FMA Direct Cellpro 4s Quick Start Manual

4
Cellpro 4s
Charge Protection Module
Interpreting the Status Module LED and tones
This LED pattern...
Repeating single flash
Repeating double flash
Means this...
Brown out; possible loose connection
One cell has reached 4.2V; charging stops
Model CP4S-CPM
for Cellpro LiPo Battery Packs
Cellpro 4s CPM specifications
Maximum charge current
Dimensions
Weight
≤1C for the connected pack or 10A, whichever is lower
1.50" (not including telemetry output connector) x 1.00" x 0.40"
0.63oz (18g)
About the Cellpro 4s Charge Protection Module
The Cellpro 4s Charge Protection Module (CPM) protects FMA Cellpro Battery Packs from
overcharging during charging from a non-Cellpro charger. Cellpro Packs have special connectors
that enable the Cellpro 4s CPM (as well as Cellpro 4s Discharge Protection Modules) to monitor
the voltage of individual cells within the pack.
During charging, the Cellpro 4s CPM monitors cell voltages and disconnects the charge current
when the first cell reaches 4.2V. This extends pack life by preventing overcharging.
Features

Works with any standard LiPo charger.

Handles up to a 4s Cellpro Pack.

Three Cellpro 4s CPMs can be daisy-chained to handle up to 12 cells in series.

Connects to charger through Deans Ultra connector.

Integrated LED provides status information.
Precautions
FMA limited warranty for power management components
FMA, Inc. warrants this product to be free of manufacturing defects for the term of 90 days from the date of purchase. Should any defects covered by this warranty occur, the product shall be repaired or replaced with a unit of
equal performance by FMA or an authorized FMA service station.
Limits and exclusions
This warranty may be enforced only by the original purchaser, who uses this product in its original condition as
purchased, in strict accordance with the product’s instructions. Units returned for warranty service to an FMA
service center will be accepted for service when shipped postpaid, with a copy of the original sales receipt or warranty registration form, to the service station designated by FMA.
This warranty does not apply to:
 Consequential or incidental losses resulting from the use of this product.
 Damage resulting from accident, misuse, abuse, neglect, electrical surges, reversed polarity on connectors,
lightning or other acts of God.
 Damage from failure to follow instructions supplied with the product.
 Damage occurring during shipment of the product either to the customer or from the customer for service
(claims must be presented to the carrier).
 Damage resulting from repair, adjustment, or any alteration of the product by anyone other than an authorized
FMA technician.
 Installation or removal charges, or damage caused by improper installation or removal.
Call (301) 668-7614 for more information about service and warranty repairs.

Follow all instructions in this manual to assure safe operation.

Before charging through a Cellpro 4s CPM, allow packs to cool for one hour. During discharge, inner cells become hotter than outer cells. If a pack is charged when hot, cells will be
damaged because their different temperatures result in different charge rates.

Always watch LiPo packs while they are charging. Never leave LiPo packs unsupervised during charging.

Follow all LiPo charging precautions, as listed in the warning sheet provided with FMA LiPo
packs, including charging packs in a fireproof container and monitoring the entire charging
operation.
FMA, Inc.

5716A Industry Lane
Sales: (800) 343-2934
060422


Frederick, MD 21704
Technical: (301) 668-7614

www.fmadirect.com
2
3
Charging a Cellpro Pack with the Cellpro 4s CPM
Charging two Cellpro Packs at the same time
When the Cellpro 4s CPM is connected between a LiPo charger
and a Cellpro Pack, the Cellpro 4s CPM monitors each cell’s
voltage and cuts off charge current to the pack when the first cell
reaches 4.2V. Although the Cellpro 4s CPM cannot balance individual cells, it does protect against overcharging individual cells.
This capability—not available in standard LiPo chargers—helps
maintain pack performance and life expectancy.
You can connect up to three Cellpro 4s CPMs in series to simultaneously charge multiple Cellpro
Packs (12s maximum). Your LiPo charger must output a voltage equal to the sum of the packs.
For example, if you are charging a 4s pack and a 3s pack, your charger must be able to charge a
7s pack (about 30 volts output).
1s to 4s
CellPro
Battery Pack
When charging at a 1C or lower rate, you can leave the pack connected in the aircraft or remove it.
1s to 4s
CellPro
Battery Pack
CAUTION: Never exceed a 1C charge rate when charging a
Cellpro Pack with the Cellpro 4s CPM.
1s to 4s
CellPro
Battery Pack
2. Plug the Cellpro Pack into the Cellpro 4s CPM (as shown at
right).
3. Plug the LiPo charger into the Cellpro 4s CPM’s Charge Connector.
CellPro
4s CPM
10A fuse
CellPro
4s CPM
Telemetry output
Signal
+
Ground
10A fuse
Red
Black
10A fuse
Signal
+
Ground
5. When charging is complete, disconnect the pack from the
Cellpro 4s CPM.
Telemetry output
CellPro
4s CPM
Replacing the fuse
Cut, strip and solder these
wires together, and cover the
joint with heat shrink tubing
The Cellpro 4s CPM’s power input is protected by a standard
miniature automotive fuse. If the fuse blows, replace it with a
10A fuse (available at auto supply stores).
+ –
LiPo
Charger
Wiring alternatives
When connecting multiple CPMs, the soldered connections
shown on this page are best, because they eliminate connector
resistances. If you’d rather not have a permanent connection,
you can construct an adapter cable with Deans Ultra connectors
to achieve the same result, or you can use FMA Connector Modules. Use a CMS-HC-5 to connect up to three CPMs to charge in
series. Use CMP-HC-5 modules to connect any number of CPMs
to charge in parallel.
+ –
LiPo
Charger
Telemetry output
Note: If charging terminates early, reduce charger
current.
Signal
+
Ground
4. Charge according to instructions provided with the charger.
Tip: Store Cellpro Packs (and all LiPo batteries) at
about ½ charge. LiPo chemistry has a very low selfdischarge rate, and LiPo batteries do not need periodic
recharging as NiCd and NiMH batteries do.
Power connector
not used during
charging
Power connector
not used during
charging
1. Allow pack to cool.
Note: Leaving a pack connected to the CPM will slowly
discharge the pack.
Power connector
not used during
charging
To charge: