Crestron DIN-AP2 DIN Rail 2-Series Automation Processor 2-Series control engine, MMC memory expansion card slot Cresnet port - master/slave selectable, 10/100 Ethernet | SSL encryption e-Control 2, SNMP, & RoomView support, 2 bidirectional RS-232 COM ports 4 IR/serial ports, 8 Versiport I/O ports 4 Low-voltage relay ports, Configurable via Crestron D3 Pro software