Product Description
The DS200ACNAG1A is an Attached Resource Computer Network Board from General Electric. Better known by the functional industry acronym ACNA, this board, while originally created as a component for the Mark V EX2000 subseries; is additionally compatible with the Mark VI and DC2000 Series lines. The fourth commercially released Speedtronic gas and steam turbine management system for heavy-duty turbines released by GE, the Mark V is a triple-redundant microprocessor-based system that achieves extremely high reliability rates due to the multiple backups on all critical controls and protection parameters. EX2000 legacy series products such as this ACNA module also tend to feature a direct sensor interface, built-in diagnostics, and online maintenance capabilities.
Hardware Tips and Specifications
It is important to note that conventional ARCNET systems, including this DS200ACNAG1A model, operate at a rate of 2.5 Mbps. This allows a signal on the network to happen in approximately 400 ns. This timing limits the size of an ARCNET system, which cannot, realistically, be longer than four miles; any longer than this, the system will begin to experience extended timeouts when messages are sent between nodes.
The DS200ACNAG1A has very few components, considering its very small circuit board size. Some relevant components include:
- four metal film resistors (R1/R2/R3/R4,)
- two transistors,
- one diode,
- and three capacitors (C1/C2/C3.)
The board is built with two openings ringed with metal cut into either side of the card. These are marked as GND1 and GND2. The center of the board is populated by two communications relay devices. The top surface of both communications relay components are printed with relay diagrams.
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