4Interpreting the Status Module LED and tones
This LED pattern... Means this...
Repeating single ash Brown out; possible loose connection
Repeating double ash One cell has reached 4.2V; charging stops
Cellpro 4s CPM specications
Maximum charge current ≤1C for the connected pack or 10A, whichever is lower
Dimensions 1.50" (not including telemetry output connector) x 1.00" x 0.40"
Weight 0.63oz (18g)
060422
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 pur-
chase. 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 war-
ranty 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.
Cellpro 4s
Charge Protection Module
Model CP4S-CPM
for Cellpro LiPo Battery Packs
FMA, Inc.
5716A Industry Lane
Frederick, MD 21704
Sales: (800) 343-2934
Technical: (301) 668-7614
www.fmadirect.com
About the Cellpro 4s Charge Protection Module
The Cellpro 4s Charge Protection Module (CPM) protects FMACellpro 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 rst 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
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 dis-
charge, 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 dur-
ing charging.
Follow all LiPo charging precautions, as listed in the warning sheet provided with FMALiPo
packs, including charging packs in a reproof container and monitoring the entire charging
operation.
