Offering self-powered, distributed I/O for substation equipment monitoring and fast automation and control applications in conjunction with the OrionLX, the 878 DIOD provides combinations of digital inputs, digital outputs and transducer inputs with all I/O accessible via IEC 61850 or DNP3 protocols.
In the largest of three available chassis, a maximum of 56 digital inputs, 24 digital outputs, or 48 transducer inputs are supported in the serial-only version (48 digital inputs, 20 digital outputs or 40 transducer outputs with Ethernet). The digital inputs are fully isolated from each other, and are jumper selectable for input level and threshold (150V dc input/15V dc threshold or 300V dc input/70V dc threshold). The digital outputs employ protection and control industry standard-type output relays and circuitry to ensure system reliability and are jumper selectable for desired output state (normally open or closed) and for relay state (energized or de-energized). The transducer inputs are available in eight-input modules that are jumper selectable for 0–10V dc, 0-1mA, or 4-20mA ranges. On-board Boolean logic can simplify schemes requiring control at protection speeds. The 878 complements the Orion DDIO and DCIO in applications requiring either IEC 61850 or higher density of I/O.
Article posted from the Summer 2013 TechTalk. Download the full PDF here.