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DCA

DCA IRMA 3 IRMA III ISA Network Card 003581 Rev A Token Ring BNC RJ45

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SKU:
13840
MPN:
3581
Condition:
Used
Availability:
Usually ships within 1-2 business days.
Weight:
2.00 LBS
Shipping:
Calculated at Checkout
  • DCA IRMA III 003581 ISA network card – angled top view showing full PCB on pink foam
  • DCA IRMA III 003581 bracket close-up showing BNC and RJ45 connectors
  • DCA IRMA III 003581 PCB label close-up showing '003581 REV.A' sticker
  • DCA IRMA III 003581 ISA network card – angled three-quarter view showing front bracket with BNC, RJ45, and BNC connectors
  • DCA IRMA III 003581 ISA network card – solder-side (reverse) view showing ISA edge connector
  • DCA IRMA III 003581 PCB close-up showing main DCA controller chip and 003581 REV.A label
  • DCA IRMA III 003581 PCB close-up showing three Hyundai HY6264P-10 memory chips and DCA secondary chip
  • DCA IRMA III 003581 PCB wide close-up showing DCA controller, crystal oscillator, and logic ICs
  • DCA IRMA III 003581 ISA network card – front bracket view showing BNC and RJ45 ports
$50.00
Was: $100.00
Current Stock: 1

Sold Out

Description

DCA IRMA 3 IRMA III ISA Network Card 003581 Rev A Token Ring BNC RJ45

16-bit ISA network interface card for Token Ring LAN connectivity. Designed for IBM PC/XT/AT and compatible systems with ISA expansion slots.

Specifications & What's Included

  • Model: IRMA 3 / IRMA III, MPN 003581 Rev A
  • Form Factor: ISA (16-bit expansion card)
  • Network Type: Token Ring
  • Connectors: BNC and RJ45
  • Controller: DCA Inc 8920EV VDT
  • Memory: 3x Hyundai HY6264P-10 SRAM
  • Crystal: 37.7392 MHz
  • Manufactured: Malaysia, 1988
  • Includes: Card only; no software or documentation

Applications

Token Ring network cards were used in enterprise and office environments during the 1980s and 1990s as an alternative to Ethernet. The IRMA 3 supported speeds of 4 or 16 Mbps and was compatible with IBM's Token Ring architecture. These cards typically connected IBM mainframe networks, mini-computers, and PC workstations in corporate LANs. The dual connectors allowed connection via BNC coaxial cable or twisted-pair RJ45 cabling depending on network infrastructure.

Condition: Used
This DCA IRMA III 003581 Rev A ISA network card is in good used condition. The PCB is clean with no visible damage, cracked traces, or missing components. The bracket shows light surface wear consistent with prior installation. All connectors — BNC and RJ45 — appear intact. The card was pulled from a working environment. Please view our photo set and contact us if you have any questions.
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Warranty Information

We stand behind every item we sell with a 30-day money-back guarantee. If your item arrives not as described, you may return it within 30 days for a full refund. Please inspect your purchase upon arrival and contact us with any questions.
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Additional Information

Brand:
DCA
Model:
IRMA 3
MPN:
003581
Secondary Model:
IRMA III
Type:
ISA Network Interface Card (NIC)
SKU:
13840
Hardware Revision:
Rev A
Form Factor:
ISA (8-bit/16-bit expansion card)
Interface Type:
ISA Bus
Connector Type:
BNC, RJ45
Network Type:
Token Ring / LAN
Main Controller Chip:
DCA Inc 8920EV VDT 7011-6084, 002695 Rev 01
Memory Chips:
Hyundai HY6264P-10, 8909B Korea (x3 visible)
Crystal Oscillator:
37.7392 MHz
Country/Region of Manufacture:
Malaysia
Manufacture Date:
1988 (per PCB copyright mark)
Condition:
Used – Pulled from Working Environment
Seller Notes:
Card only; no software or documentation included.
Compatible With:
IBM PC/XT/AT and compatibles with ISA slots
Condition Notes:
DCA IRMA III 003581 Rev A ISA network card in good used condition. PCB is clean with no visible damage. Bracket shows light wear. BNC and RJ45 connectors intact. Pulled from a working environment.
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Coaxial (BNC-style)
Connector Type 3:
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Memory Chips:
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Crystal Frequency:
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Condition:
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Patent:
U.S. Pat. 4,885,482
FCC Class:
Class A
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Card only; no software, drivers, or accessories included.
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