The MSA series of Motor Starters offer several options to the user by combining different boards with the standard FCOG-6100 SCR Firing Board.

MSA-4   Solid State Motor Starter Control Electronics

The MSA-4 is a combination of the FCOG-6100 SCR firing board and AB-02 Switch Board. These provide the user more flexibility in choosing the initial current and acceleration time of the starter. The three acceleration times and three initial current settings are provided by two rotating switches that replace the fixed resistors on the firing board. Adjusting the switch positions allows the user to determine the time required to reach the customer-supplied command signal, SIG HI.

MSA-5    Solid State Motor Starter Control Electronics

The MSA-5 is a combination of the FCOG-6100, plus the MS-400 board. This is an excellent mid-level compromise between a more complex controller and a simpler one. In addition to three acceleration times and three initial current settings, this starter provides a linear motor voltage ramp with motor voltage feedback stabilization. This package also provides the option of using a tachometer input for a linear motor speed ramp. In either configuration, the starter board supplies the gate delay command signal, SIG HI.