Honeywell SC - UCNN11 Redundant Controller Ready to ship ControlEdge RTU has an innovative modular hardware design with processor modules that plug onto IOTAs that contain only passive devices such as cable connectors and an expansion I/O connector allowing expansion I/O modules to connect without any further infrastructure. Key features of Non-Redundant Controller 1. 18-30 VDC Power Input 2. RS485 Ports (qty 2) 3. RS232 Ports (qty 2) 4. Ethernet Ports (qty 2) 5. Onboard IOM