Maple Systems MLE-D0016PProduct Attribute Attribute Value Series EX Series Overview Compatible with all EX Series PLCs, Maple Systems offers twelve MLE I O expansion modules (nine digital and three analog). Customize your PLC to maximize functionality while minimizing unnecessary costs. Up to 16 expansion modules can be connected to an EX Series PLC for a maximum of 256 additional I O points. Digital Modules EX Series digital I O modules support as many as sixteen inputs or