Thanks for that - i checked but the model i have while it says CW it has the circuit board shown in the "C" model - no decoder.
I have heard that some of these older versions overheat and burn out if placed on DCC , so dont want to take the risk.
Not sure if I can get a decoder retrofitted?

I have just purchased a Spectrum DC Locomotive Item No 86011, GE Dash 8-40CW, date inside box is 04 05 28,  will this loco run on a EZ Command DCC layout ?