Johnson Controls® will discontinue the PENN® System 350 line of modular electronic controls. You can replace System 350 assemblies with the System 550 line of modular electronic controls. In June 2025, Johnson Controls aims to release two C550A control modules specifically designed as functional replacements for existing System 350 control modules. The C550ACN control module features two relay outputs and the C550AQN control module features two analog outputs.
The System 550 modules are not backwards compatible with System 350 modules. When you replace a System 350 module, you must replace all the modules in the assembly with the required System 550 modules. You will likely need fewer replacement modules, because System 550 C550A control modules come standard with an integrated display and two outputs.
A System 550 C550A new product launch package will provide additional details.
Discontinuation of System 350 Modular Electronic Controls
