The DS200ACNAG1ACC is a GE Mark V component that functions as an Attached Resource Computer Network Card, or ARCNET. The Mark V is a gas/steam turbine management system developed by GE in the 1990s as part of their successful Speedtronic line. While Speedtronic systems have been managing heavy-duty turbines since the 1960s, significant advancements in technology allowed the MKV to have features like on-line repair of its triple-redundant controllers, full turbine-generator monitoring, digital valve positioning, and enhanced diagnostics that help technicians isolate a fault to the card level.
The DS200ACNAG1ACC facilitates ARCNET LAN communications within the larger system. The board is placed to accept signals from the main processor board (LDCC) and pass them on to the turbine control operator interface, or vice-versa. This system uses coaxial cables. The ACNA card is designed to accept two coaxial cables. It is also important to note the <Status> S data link connection to the turbine controller is made on this board.
Very few components are located on the DS200ACNAG1ACC, as it is a small board. Board components include three capacitors that are marked as C1, C2 and C3, four resistors made of metal film marked R1, R2, R3 and R4, a single diode, and two relays. Each relay has a printed relay diagram on one surface. The board also includes two factory-made openings that have metal rings inserted inside. These openings have been marked as GND1 and GND2.
The DS200ACNAG1ACC has two BNC plugs located along the top edge. These are right-angled female plugs and are designed to accept LAN coaxial cables. The board also has one vertical pin (6-pin) male terminal connector located in its center.