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Compact Digi One SP device server, desktop form factor, light grey enclosure with DB-9 and RJ-45 ports

Digi International

Digi International 70001851 barebone server

SKU CH-ZCAS-KQAMT MPN 70001851

Compact serial-to-Ethernet device server with one DB-9 and one RJ-45 port in a 3.7" × 1.7" desktop form factor

  • Compact desktop form factor fits tight spaces
  • Single RJ-45 port connects serial devices to Ethernet
  • One DB-9 serial port links legacy equipment
  • Lightweight 2.24 oz design simplifies installation
  • Five-year limited warranty covers long-term reliability

Serial-to-Ethernet connectivity

The Digi One SP device server connects equipment with a serial port to an Ethernet network. Its compact desktop form factor measures 3.7" by 1.7" by .9" and weighs approximately 2.24 oz. The unit provides one DB-9 serial port and one RJ-45 network port for straightforward integration.

Industrial and legacy device integration

This barebone server suits engineers adding network access to older machinery, medical instruments or building-automation controllers that only offer serial interfaces. Buyers who need multiple serial ports, wireless connectivity or Power over Ethernet should look at other models.

Single DB-9 and single RJ-45 port

The decisive specification is the presence of exactly one serial port and one Ethernet port on model 70001851. If the target device requires more than one serial connection or a different physical interface, this unit will not meet the requirement.

How it compares

Measured against everything we stock in Barebone Servers & DIY Kits, at today’s prices. Recalculated every night.

Price $208.99
Cheaper than about 98% of the 532 comparable items (median $2,503.49).

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Specifications

Product
Brand nameDigi International
Model name70001851
Size & build
Shipping weight0.91 kg
Package size269 × 198 × 94 mm

Questions about this item

Will the DB-9 serial port need any pin-replacement or cable servicing over time?

The DB-9 and RJ-45 ports are fixed on the board; no internal pins or cables are user-serviceable, so the unit runs until the ports themselves wear from mating cycles.

What limit appears first when the Digi One SP passes continuous serial-to-Ethernet traffic?

The single RJ-45 network port sets the throughput ceiling; sustained streams will hit that link speed before the internal bridge becomes a bottleneck.

How much heat or fan noise does the 3.7 by 1.7 by 0.9 inch enclosure produce during all-day operation?

The palm-sized metal case has no fan and draws minimal power, so it stays silent and only warm to the touch even under constant load.

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