Starters and motors

[Lucien Nunes]

DC motors are inherently capable of regeneration, and have been used with dynamic braking for a century or more. PM motors are the simplest - just short the terminals - car windscreen wipers usually park like this. Induction motors are not so easy because reconfiguring the supply to give reverse torque stands the risk of the motor starting up in reverse. So it takes an extra piece of kit, the rectifier (and transformer, if the rectifier is not phase controlled) to brake an induction motor. Of course with 4-quadrant PWM drive anything is possible. OP: look up 4-quadrant motor control.

 

[netblindpaul]

But as said why only getting 230v motor connections,

why nit not just break live with e stops , forget control boards ...

There is a LOT more to it than that, the three items are, DOL starter, motor TM O/L, DC injection braking module.
The requirement is enshrined in the MD, and is stipulated in the various A, B & C type standards.
A bandsaw is an Annexe iv machine.
E-stops are NOT load switching devices, and must never be used as such.
The assembly is an SRPCS, thus it must meet certain standards, based on the relevant as I have said, A, B & C type standards for the machine and control system under consideration.
Looking at this I would also hazard that the machine is CE marked.