M2-D - Universal Controller
The M2-D is a low cost universal controller that is built onto the same chassis/mainboard as the M2-V. It has a different cover and updated terminal blocks. The M2-D was developed as a low point count controller designed to control Heat Pump type applications that require only a few inputs/outputs. Internal firmware of the M2-D will report the controller as an M2-V although the M2-D does not come with any plug in cards other than a 4 channel relay card (M2-R4).