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Serial Device Server 2 Port Industrial

Remote access to serial devices across your LAN/WAN


64 In Stock
Same Day Shipping (before 5PM ET)
Extended Double Diamond™ Warranty Available (3 Additional Year)

*Required field

Product Features

  • An easy way to remotely monitor, manage, and control your industrial devices in the field.
  • Easy to configure through a Web browser, serial console, Telnet™, or Windows® utility.
  • Very compact.


  • Accepts 12-VDC power. Order the 100–240-VAC/12-VDC power supply (PS012B) separately or order this device server together with a power supply as a kit (LES302A-KIT).
  • Features TCP server/client, UDP, virtual COM, and tunneling modes.
  • Software-selectable RS-232/485/422 serial data communications.
  • Ideal for controlling manufacturing or automation devices over a LAN.
  • Auto MDI/MDI-X Ethernet port. Autonegotiates, autodetects for 10 or 100 Mbps.
  • Rugged, metal case that can be wall or DIN rail mounted (mounts included).
  • Firmware can be upgraded over an Ethernet network from a remote PC.
  • On serial side, features 15-kV ESD protection.

  • Use your Ethernet network to reliably access remote RS-232 devices or RS-422/-485 industrial equipment from a remote workstation.

    The 2-Port 10/100 Device Server gives you a cost-effective gateway for TCP/IP Ethernet and serial signal communications, enabling nearly any serial devices to be connected to a new or existing Ethernet network.

    It does this by encapsulating serial data and transporting it over Ethernet, communicating full-duplex and transmitting bidirectional data transparently between the serial port and a network.

    Plus, it's easy to configure. You can do this remotely over the Ethernet link using Telnet, a Web browser link, a serial console, or another Windows utility.

    Even better, it comes with virtual communications software. Through it, you can use an existing Windows based application to access a serial device by mapping the virtual COM port to a remote serial server over Ethernet.

    In addition, the device server supports TCP server, TCP client, and UDP modes of communication, and serial tunneling, which you can use to send data between two serial devices via the TCP/IP link instead of RS-232, -485, or -422 connections. Link a touchscreen to a distant PLC over the Ethernet network, for instance. (NOTE: Multiple units needed for TCP client and tunneling modes.)

    Ideal for any manufacturing, process engineering, or automation application, the 1-Port 10/100 Device Server, RS-232/422/485 can also be used to communicate with bar-code scanners, terminals, PLCs, electronic Kanban inventory management devices, and similar equipment on the factory floor.

    Tech Specs

    CE Approval Yes
    Connectors Serial: (2) DB9 M (RS-232/422/485 software selectable); Ethernet: (1) RJ-45 (10BASE-TX/100BASE-T)
    Dimensions 1.1"H x 3"W x 3.4"D (2.8 x 7.6 x 8.6 cm)
    Ethernet Interface 10 or 100 Mbps
    Power 9-30 VDC from separate AC power supply (not included); Consumption: 1.5 watts (maximum)
    RoHS Yes
    Serial Baud Rate 1200 bps to 230 kbps
    Serial Data Bits 7, 8
    Serial Data Parity None, Odd, Even, Mark, Space
    Serial ESD Protection 15 kV
    Serial Flow Control None; Software: X-ON/X-OFF; Hardware: RTS/CTS
    Serial Stop Bits 1, 2
    Software Support Protocols ICMP, TCP (UDP)/IP, DHCP client, SNMP, HTTP, Telnet
    Standard IEEE 802.3
    This product works with:

    This product also works with:
    • DIN Rail Power Supply, 10 Watts, 12 VDC (MDR-10-12)
    Questions? Contact our FREE Tech Support.

    * Technical specification weight is the unit weight. It is not the packaged shipping weight. For shipping weight, please contact Black Box customer service at 877-877-2269.



    Double Diamond Warranty

    Extended 1 Year Warranty Available

    Protect your purchase with an additional 1 Year Double Diamond™ warranty!
    Cost: $21.94

    Extended 3 Year Warranty Available

    Protect your purchase with an additional 3 Year Double Diamond™ warranty!
    Cost: $43.88


    Double Diamond™ Warranty (Standard)

    Take the risk out of equipment purchases with the Double Diamond™ Warranty from Black Box Network Services.

    The Double Diamond Warranty is our warranty that protects your Black Box® brand products* from accidental damage, including drops, water, and power surges.

    The Serial Device Server 2 Port Industrial comes with a standard 1 Year Double Diamond™ Warranty (Standard) already included.

    During the warranty period, Black Box Network Services will repair or replace your damaged equipment within one week of receipt at NO CHARGE!*

    Plus, get an Extended Double Diamond Warranty.

    You can also extend your warranty or protect a previously purchased Black Box® brand product** for an additional year—for only 10% of the purchase price! Or, extend your coverage for a full three years for only 20% of the purchase price!

    Ordering an extended warranty is easy: When viewing a product in your shopping cart, just select the one or three years of additional coverage in the dropdown menu under “Warranty Options.” For details, contact Customer Service at 724-746-5500.

    * Warranty subject to certain exclusions and limitations ** Certain products may not be eligible.

    What’s more, we also have a 45-day return policy. Simply call Customer Service for a Return Authorization (RA) number, return your product in new condition and in the original package, and receive a full refund.