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Green PCI expansion card with four DB-9 serial ports and a metal bracket

Digi International

Digi International AccelePort 4r 920 77000560 4-port RS-232 PCI expansion card

SKU CH-GNRS-8XH3W MPN 77000560

Adds four RS-232 serial ports via a universal PCI slot with data rates up to 921.6 Kbps

  • Transfer speedUp to 921.6 kbit/s
  • Product typePCI to Serial Port Card
  • Compatible withOperating Systems: Microsoft Windows .NET Server 2003 Micros
  • Key featuresCard: Universal Card (3.3 V and 5 V) PCI Slot: 32- and 64-bi
  • Product dimensions6.88 in × 0.5 in × 4.2 in
  • Four RS-232 ports for multi-user serial connectivity
  • Universal 3.3 V and 5 V PCI slot fits 32-bit and 64-bit systems
  • Up to 921.6 Kbps throughput driven by 32-bit IDT RISC processor
  • Broad OS support from Windows 95 to Linux and Unix variants
  • DB-9, DB-25 and RJ-45 connectors included for flexible cabling

AccelePort 4r 920 four-port serial card

The Digi International AccelePort 4r 920 adds four RS-232 ports through a single PCI slot. It suits retail point-of-sale, industrial control, data collection and office automation systems that still rely on serial connections. The card also supports Remote Access Service deployments needing multiple concurrent lines.

DB-9 DB-25 RJ-45 connector flexibility

The board ships with DB-9, DB-25 and RJ-45 interfaces so integrators can match legacy cabling without extra adapters. A 32-bit IDT RISC processor handles the I/O load, freeing the host CPU for application work. Universal 3.3 V and 5 V signalling lets the card install in either voltage environment.

PCI 2.3 PCI-X bus ceiling

Throughput tops out at 921.6 Kbps per port, which the shared PCI 2.3 or PCI-X bus must sustain across all four channels simultaneously. The 32-bit and 64-bit slot compatibility eases installation, but total bandwidth cannot exceed what the host bus provides. Buyers needing higher per-port rates or more than four ports must look beyond this architecture.

How it compares

Measured against everything we stock in PCIe Expansion Cards, at today’s prices. Recalculated every night.

Price $383.99
Pricier than about 90% of the 891 comparable items (median $30.99).

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Specifications

Product
Brand nameDigi International
Product lineAccelePort 4r 920
Model name77000560
Product typePCI to Serial Port Card
Performance
Transfer speedUp to 921.6 kbit/s
Size & build
Product dimensions6.88 in × 0.5 in × 4.2 in
Shipping weight0.50 kg
Package size254 × 203 × 51 mm
Compatibility
Compatible withOperating Systems:
Microsoft Windows .NET Server 2003
Microsoft Windows XP, 2000, NT
Microsoft Windows 95/98/Me
Solaris SPARC and Intel
Novell NetWare
HP-UX
Linux
OpenVMS
OS/2
QNX
SCO OpenServer
SCO UnixWare
Tru64

Questions about this item

Will the DB-9, DB-25 or RJ-45 connectors on this 77000560 card need periodic replacement under heavy serial traffic?

The connectors are standard passive interfaces; they do not wear out from data throughput alone and only require attention if physical damage or corrosion occurs.

What limits sustained throughput on this AccelePort 4r 920 when all four ports run continuously at 921.6 Kbps?

The 32-bit IDT RISC processor and the PCI 2.3 bus set the ceiling; aggregate bandwidth cannot exceed the card's rated 921.6 Kbps per port.

How much heat or extra power does this universal 3.3 V and 5 V PCI card add when it runs all day in a server?

The card draws power directly from the PCI slot and has no active cooling; heat output is low and typical for a 32-bit RISC serial controller.

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