Caution: The heat sink can reach temperatures of 200 degrees and higher when controlling higher amps.
The PWM-TBFS does not require positive from the battery. Run 12v positive from the battery to the cell. Run negative (ground) from the battery or from any other known good ground to the left terminal block in back. Run the negative from the cell into the middle terminal block. Run an ACC 12v (on while ignition is on only) to the right terminal block.
The PWM-TBFS comes equipped with a cooling fan, amp test points and screw down terminal blocks. The terminal blocks entry holes are located on the back panel, while the terminal block screws are located on the top behind the heat sinks. The cooling fan is on top in front of the heat sinks and should be clear of any foreign objects like loose wires or zip ties. The amp test points are on the front panel left of the power switch and knob.
When deciding on a location for the PWM, these three features should be taken in to consideration, most importantly the fan. Make sure there is nothing that will touch the fan and restrict air flow or operation. Give it some room to circulate air.
The PWM-TBFS is rated for 45 amps. However, we recommend you run one cell with each PWM at 20 to 25 amps.
The PWM-TBFS will control amperage from 0 to 45 amps, however, you should mix your electrolyte to only draw the desired amount of max amps. Example: If you want to run your cells at 20 amps, you should be careful to mix the electrolyte to only draw 20 to 30 amps without the PWM in line. The PWM will have to work harder and heat up faster and to higher degrees when controlling higher concentrated electrolyte. Example: If you mix the electrolyte carelessly to draw 90 amps and try to use the PWM to control it to 30 amps, the circuit will heat up much faster to higher degrees than it is rated for and fail.
