CM-400 48 V EO, Philips ActiveSite is a DIN rail-mountable control module designed for use with third-party power supply units like PS-480 48 V. An onboard test button allows you to instantly confirm that the control module and any attached Accent Compact luminaires are working as you expect them to. CM-400 48 V EO, Philips ActiveSite has been built to work with Philips ActiveSite, so you’ll have peace of mind knowing that you’ll be alerted to an issue with your control module as soon as one is detected.