4 reader master controller with 4Amp PSU + TCP/IP. RS485 / IP connectivity. Built in 12Vdc 3Amp power supply unit. Housed in a robust metal enclosure. Space available for optional expander slave or I/O module. Ideal for high volume - 48,000 card capacity. Stand-by battery facility. Dimensions 390 x 410 x 90 mm. Max Cards 48,000. Readers: Maximum of 4 using the majority of reader, keypad and biometric technologies including TDSi EXprox, Optica and those with standard clock & data, 26-bit Wiegand and HID standard 37-bit (H10302) output formats. For IR technology only compatible with TDSi Digital Infrared readers. Up to 4 Doors. Communications: RS-232, RS-485, Ethernet (TCP/IP). Use in conjunction with EXgarde™ PRO to provide a complete, fully configured access control solution.