Description
IBM 16/4 Token Ring MCA Adapter Microchannel 60G0631A 92F4520 93F0333
The IBM 16/4 Token Ring MCA Adapter (part number 60G0631A, FRU 92F4520, MPN 93F0333) is a Microchannel Architecture (MCA) expansion card that connects a host IBM PS/2 or compatible Microchannel-bus computer to a Token Ring local area network at either 4 Mbps or 16 Mbps. The card interfaces to the network through a DB9 connector on the bracket and is classified FCC Class A for commercial and industrial environments.
Specifications & What's Included
- Manufacturer: IBM
- Part Number: 60G0631A
- FRU Number: 92F4520
- MPN: 93F0333
- Bus Interface: MCA (Microchannel Architecture)
- Network Standard: Token Ring 16/4 (IEEE 802.5)
- Supported Data Rates: 4 Mbps and 16 Mbps
- Bracket Connector: DB9 (9-pin D-sub)
- FCC Classification: FCC Class A — See Manual
- On-board memory chips: Toshiba TC5630 (visible in photos)
- Form Factor: Full-length MCA expansion card with blue card guides
- Includes: Card only — no software, cables, or documentation included
Applications
The IBM 16/4 Token Ring MCA Adapter was designed for use in IBM PS/2 desktop computers and other Microchannel-bus systems as part of IBM's Token Ring networking infrastructure, which was widely deployed in corporate and enterprise environments throughout the late 1980s and 1990s. Token Ring networks operate on a deterministic token-passing protocol (IEEE 802.5), which was favored in IBM-centric enterprise environments for its predictable performance characteristics. This card is primarily sought today for legacy IBM PS/2 system maintenance, historical computing preservation, and corporate environments still running Microchannel-based IBM equipment that requires active Token Ring connectivity.
This IBM 16/4 Token Ring MCA Microchannel Adapter (60G0631A / FRU 92F4520) has been inspected and is in good used condition. It was pulled from a working environment where it was previously in service. The board shows typical light wear consistent with prior use — some dust and minor soiling visible on the PCB surface, as seen in the photos. The DB9 connector on the bracket appears intact and undamaged. Please view our photo set and contact us if you have any questions. Please note: We have multiple units in stock — yours may not be the one shown in the photos, however, it will be similar in condition and function.
Warranty Information
Additional Information
Brand: |
IBM |
Model: |
60G0631A |
Secondary Model: |
92F4520 |
MPN: |
93F0333 |
FRU Number: |
92F4520 |
Part Number: |
60G0631A |
SKU: |
11081 |
Type: |
Token Ring Network Adapter Card |
Bus Interface: |
MCA (Microchannel Architecture) |
Network Standard: |
Token Ring 16/4 |
Data Rate: |
4 Mbps / 16 Mbps |
FCC Classification: |
FCC Class A |
Connector Type: |
DB9 (9-pin D-sub) |
Form Factor: |
MCA Expansion Card |
Compatible With: |
IBM PS/2 Microchannel systems |
Country/Region of Manufacture: |
Japan (Toshiba chips noted) |
Condition: |
Used – Pulled from Working Environment |
Seller Notes: |
Card only; no software or cables included. |
Review Status: |
Auto-Approved (needs review) 2026-07-03 |
Condition Notes: |
IBM 16/4 Token Ring MCA Adapter 60G0631A / FRU 92F4520 inspected and in good used condition. Pulled from a working environment. Board shows light wear and dust typical of prior use. DB9 bracket connector intact. |
