C693ALG221 GE controller [caption id="attachment_2472" align="aligncenter" width="600"] IC693ALG221[/caption] [caption id="attachment_2475" align="aligncenter" width="600"] IC693ALG221[/caption] C693ALG221 is an analog current input module for 90-30 series programmabl e logic controllers with four input channels. Each channel of the controller is capable of converting analog input signals to digital signals according to application