12-Zone Module for PL4800 & SL4800 ONLY.

• Adds 12 stations to the Weathermatic PL4800 & SL4800 Controller/Timer.
• The controller will automatically recognize the additional zones as they are installed. No special programming or resetting is required to initialize the modules.
• You can insert or remove a module without removing power from the controller.
• To install a module, push the module into the channels until you feel it lock in place. To remove a module, push DOWN on the center release panel on the top of the module and use the top tab to pull it out.