New-Surplus DS200ACNAG1ABB Connection Board

This DS200ACNAG1ABB is a new-surplus, open-box GE SPEEDTRONIC Mark V ARCNET Connection Card in the G1ABB revision, backed by warranty. Its DS200 function code ACNA — Attached Resource Computer Network — identifies it as a communications board: the connection between a Mark V processor and the ARCNET LAN that links the control system. New-surplus condition makes it a sound choice for a protected spare on a system that is no longer manufactured.

The card is straightforward — two connectors for LAN communications and a 6-pin connector — and it carries no control logic; its role is simply to keep a node on the network.

ARCNET and the Mark V Communication Cores

Mark V communications run on ARCNET, a token-passing local-area network. The most prominent ARCNET path is the Stage Link, connecting the common core <C> — the communications core of the control panel — to the operator interface <I>. GE's literature describes the Stage Link as a terminated coaxial bus that each processor joins through a "T" connector, allowing the cable to daisy-chain onward. The ACNA is the board that provides that physical connection on the panel side. Since ARCNET is used in more than one part of the system, confirm from your network drawings which segment a specific ACNA serves. A broader view of the DS200 boards is in GE Mark V DS200 Boards Explained.

Check the Network Path First

Even with a fresh spare in hand, resist swapping the connection card as a first move. ARCNET is a shared bus, so a single fault can silence multiple nodes and imitate a board failure. Confirm the real cause:

• Terminators, then cable. An absent or wrong end terminator, or damaged coax and "T" taps, will upset the whole segment. This is the first thing to rule out.
• The remote node. A failed ARCNET card at the operator interface or at another processor presents the same loss-of-comms symptom.
• Configuration. A duplicate node address or setup error keeps a station off the network with no hardware defect.
• Supply and driver. Verify power to the card and inspect the associated communication/driver board (such as the DS200STCA) before you conclude the ACNA is faulty.

When the cabling, terminators and far end all check out and configuration is correct, fitting this new-surplus card restores the connection with confidence.

Anatomy of DS200ACNAG1ABB

The part number is built as DS200 (Mark V DS200 board series) + ACNA (ARCNET Connection function) + G1 (functional group) + A (functional revision) + BB (board artwork/hardware revision). Because that final pair separates this from the ADD and ACC builds, quote the whole string and match it to your installed board and drawings. The GE Speedtronic Part Number Decoder details every field.

What Else You May Need

Consider the full communication path when you order: ARCNET coax, "T" connectors and terminators, the operator interface's ARCNET card, and communication boards such as the DS200STCA. For plants planning ahead, the Mark VI (IS200) generation replaced this architecture — Mark V vs Mark VI: DS200 to IS200 summarises the change. The complete stock list is under GE Mark V DS200 Boards.

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