Blue Sky CBM4070 - Manual

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Model CBM4070 Current Booster Module (CBM) is an optically isolated high current MOSFET switch which can be used to greatly
increase the load switching capability of Solar Boost charge controllers with load control outputs. In this application the charge controller
load control output serves as the input control signal to the CBM and the CBM provides all high current switching for the load. The CBM
can also serve as a PWM power driver for the Solar Boost 3024 DUO-Option wind/hydroelectric diversion charge control system.
Installation and wiring
The CBM’s MOSFET output turns on when a 3 – 32VDC signal is present on it’s input terminals. Input to output optical isolation
allows the output to serve as either a low side or high side switch. Up to 70 amps can be switched in a DC on/off application or up to 40
amps in a 3024 DUO-Option PWM diversion application.
¾ WARNING: CBM4070 must be mounted with heatsink fins oriented vertically as shown in the diagram
below to facilitate convection cooling. Do not separate power module from heatsink, enclose in a
confined space or restrict air flow. Do not connect Input or Output reverse polarity. Over current
protection may be required between the charge controller Load control output and CBM Input, consult
charge controller manual. Install and wire the load in accordance with the load manufacturers installation
and safety instructions and National Electrical Code, ANSI/NFPA 70. Tighten CBM Input terminals to 7 in-
lb (0.80 Nm) and Load terminals to 10 in-lb (1.13 Nm) These instructions show generalized connections
only and are not intended to show all wiring, circuit protection and safety requirements.
Do not exceed 70 ampere load current in DC on/off applications (F
ON/OFF
< 0.50Hz). To reduce the risk of
fire in DC on/off applications, connect CBM4070 to 80 ampere maximum over current protection in
accordance with National Electrical Code, ANSI/NFPA 70.
Do not exceed 40 ampere load current in 100Hz PWM applications (DUO-Option diversion). To reduce
the risk of fire in 100Hz PWM applications, connect CBM4070 to 50 ampere maximum over current
protection in accordance with National Electrical Code, ANSI/NFPA 70.
SPECIFICATIONS
25
°C unless Otherwise Indicated
Input ON voltage 3 – 32VDC
Input ON current 25mA
Max Switched Voltage 50VDC
Max Output Current
at 40°C ambient 70A DC on/off
40A Duo-Option 100Hz PWM
Max Surge Current 200A for 10mS
In/Out Isolation Voltage 1000VAC, 50/60Hz, 1 minute
Installation and Operation Manual
For Model; CBM4070
Current Booster Module
CBM4070
Load
CBM4070 over current protection
80A Max, DC on/off (F
ON/OFF
< 0.50Hz)
50A Max, DUO-Option 100Hz PWM
SB3024iL high side load drive example