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The controller is a compact and flexible design for processing and network communications. Features • Frame rate: 10, 20, 40, 80, 160, or 320 ms • Speed UCSBH1A: 600 MHz UCSBH3A: 1200 MHz • Ports: 5 Ethernet, 1 USB, 1 COM • Configuration: Simplex, dual, triple • Power: 18 to 32 V dc • No batteries • Status LEDs • Cooling 600 MHz (convection) 1200 MHz (redundant fans) • Safety: IEC-61508 compliant • Security: Achilles™ certified - Level 1 Environment • Operating temperature: UCSBHIA: -30 to 65°C (-22 to 149 °F) UCSBH3A: 0 to 65°C (32 to 149 °F) • Humidity: 5 to 95% non-condensing For dual and triple redundant systems, a second and third controller can be mounted adjacent for a compact packaging arrangement. Local LEDs are provided on the controller to indicate the status of: Link, Act, Power, Boot, OnLine, Flash, DC, Diag, and On (USB). Each controller has three 100 MB Ethernet interfaces for the I/O network so that each controller can communicate with up to three IONet networks. In redundant systems, this allows each controller to monitor redundant inputs directly and compare them for any potential discrepancies. Connectors are labeled to simplify maintenance. Controllers also have two Ethernet interfaces to the control network to communicate peer-to-peer with other Mark VIe-based control systems, as well as operator and maintenance stations. Controllers can be time synchronized between units or to a local or remote time source for accurate plant-wide sequence of events (SOE) monitoring.