DS200ACNAG1ABB Arcnet Communication Board

The DS200ACNAG1ABB is a GE SPEEDTRONIC Mark V ARCNET Connection Card, sometimes listed as an ARCNET communication board. Its DS200 function code ACNA — Attached Resource Computer Network — tells you exactly what it is: the interface that couples a Mark V processor onto the control system's ARCNET local-area network. This card is offered used, cleaned and tested, with warranty, in the G1ABB revision.

Hardware is minimal by design: two connectors for LAN communications and one 6-pin connector. There is no turbine control logic here — the value of the board is a clean, reliable connection to the network.

What ARCNET Does for a Mark V Panel

ARCNET is the token-passing LAN that Mark V uses to move data between processors. The clearest example is the Stage Link: the network joining the common core <C> in the turbine control panel to the operator interface <I>, so alarms, data and operator commands can pass between them. GE describes that link as a terminated coaxial bus, with each station tapping in via a "T" connector. The ACNA provides the board-level connection to that kind of ARCNET segment. Because ARCNET appears in more than one role within the system, confirm from your network drawings precisely where a given ACNA sits. For orientation, GE Mark V DS200 Boards Explained maps out the panel.

The Symptom Trap: Bus Faults vs Board Faults

The trap with any network card is assuming a comms failure means the card failed. On a shared ARCNET bus, a single physical-layer problem can knock several nodes offline, so the board is often innocent. Before replacing the DS200ACNAG1ABB:

• Terminators and coax. Missing or degraded end terminators, a cracked coax or a loose "T" tap are the usual suspects — check them first.
• The other end. The operator interface's ARCNET card, or another processor's connection, can produce the same "no communication" picture.
• Addressing. A node-address conflict or configuration error will keep a station off the network even with perfect hardware.
• Power and companions. Confirm the card is powered and check the related communication/driver hardware (for example the DS200STCA) before condemning the connection card.

Methodically isolating the segment prevents the classic mistake of swapping a good card while the real fault — a terminator or a cable — stays in place.

Suffix Decoder: DS200ACNAG1ABB

The number reads as DS200 (Mark V DS200 board series) + ACNA (ARCNET Connection function) + G1 (functional group) + A (functional revision) + BB (board artwork/hardware revision). The last two letters are what set this apart from the ADD or ACC builds of the same card, so match the full string to your installed board and drawings. Use the GE Speedtronic Part Number Decoder for a field-by-field guide.

Companion Boards and Media

Alongside the ACNA, the communication path includes the ARCNET coax, "T" connectors and terminators, the operator interface and its ARCNET card, and Mark V communication boards such as the DS200STCA. If your plant is looking beyond Mark V, the IS200-based Mark VI platform is the successor — see Mark V vs Mark VI: DS200 to IS200. Browse current stock at GE Mark V DS200 Boards.

Ask for Pricing

Send the full part number with suffix (DS200ACNAG1ABB), a photo of the board-edge label, your turbine model and Mark V configuration (Simplex or TMR), the quantity and how urgently you need it. We answer within 24 hours, ship worldwide DDP and accept purchase orders. Click Request a Quote, or view the wider selection at GE Speedtronic Turbine Control Boards.