Please refer to this cross-over chart to upgrade your W400 controller.
The W100 and W600 Series models shown are the nearest equivalent to the W400 model.
If an older sensor option is not in new model codes, separate line items are shown to the right.
More sensor, relay, Ethernet Communications, and/or analog input options may be available in the new platform!
Rather than simply matching capabilities, take the time to examine your needs and choose the best model.