Intelligent System Controller – size (5 in.(127mm) Wx6 in.(152.4mm) L x1 in.(25mm) H); Two RS-485 ports for downstream devices, maximum of 64 devices, On-board Ethernet, Dual Path capability, cabinet tamper and power fault input monitors. Requires OnGuard 7.5 or higher for Legacy Mode support, and OnGuard 8.3 or higher for Native Support.