Replaces the SAM4s ER-650, Up to 20,000 PLUs On screen programming simplifi es setup and makes changes easy to manage after installation. Interconnect multiple units to consolidate your sales reporting and share access to peripherals. An Ethernet connection is provided on each SPS-300 Series ECR for inter-register communications (IRC) through a network switch. Up to 8 SPS-300 ECRs can be networked. Preset PLUs facilitate fast, spill-resistant and accurate registrations.