Hello,

I need to add an e-stop switch to a small milling machine. The motor is a Baldor, rated 1 HP, 115 V, 13.2 A. I'm not familiar with the technicalities and advice will be helpful.

One possibility is an Allen Bradley 100-C16DJ10 contactor with a start/e-stop switch on a bracket on the end of the table. The coil on that contactor is 24 VDC and for that a power supply such as A-B Flex I/O 1794-PS13 will be needed. These parts are readily available through eBay.

These are some of my questions.
* The motor is easily rewired for 230 V, 6.6 A but changing the service in this institutional setting will be expensive. Is there an argument to change the service?

* Is the modular arrangement with the 24 VDC coil and PS advisable? I might also hunt for a contactor with a 115 VAC coil. Among the more recent A-B components in eBay, the 24 V coil is commonplace. A multi-decades old Square-D contactor with a 115 or 120 VAC coil is easily found. The benefits of the 24 V coil are silent operation and smaller hazard from the 24 V control circuit? The disadvantage is the need for the 24 V PS.

* A contactor and PS will need an enclosure. Best to look for that after the components are here. Any tips to find something suitable?

Thanks, ... Peter E.