DeviceMaster ® PRO 8-Port

This DeviceMaster PRO 8-port Ethernet device server has no serial cable distance limitations and operates under extreme temperatures.

Part Number: 99443-5

PortVision DXweb

Engineering Drawing

Download Specifications

    • No serial cable distance limitations
    • RS-232/422/485 software selectable interfaces
    • Application compatibility via Windows and Linux certified drivers
    • Dual Ethernet ports for daisy-chaining devices
    • PortVision DX
    • Surge protection for serial ports
    • Web-based configuration
    • Enables panel and optional rack mounting
    • Wide operating temperature (-40° to 75°C)
    • Built-in two-port 10/100 Ethernet switch
    • Configuration management via SSL & SSH
    • SSL/TLS serial data stream encryption up to TLS 1.2
    • TLS 1.2 compliant when running SocketServer
    • Real-time email event notification
    • IPv6 support


    The Comtrol DeviceMaster PRO 8-Port is an eight port device server designed for network-enabling serial communications devices. When used with the included NS-Link™ driver software and a host PC, the DeviceMaster PRO enables placement of COM or TTY ports anywhere on an Ethernet network or across the Internet. In applications where connecting legacy serial devices to a PC without software changes is a requirement, a pair of DeviceMaster PRO units can be used to create a point-to-point serial tunnel across the network that seamlessly transfers serial data via TCP or UDP socket connections. This product is fully compliant with the RoHS Directive.

    • DeviceMaster PRO 8 Port DB9M Device
    • Power Supply
    • Loopback Plug
    • Rubber Bumpers, Mounting Brackets, & Screws
    • US Power Cord
    • Euro Power Cord
    • RJ45 to DB9F Adapter
    • Bus Interface Specification10/100 BASE-T
    • Memory
      • SDRAM8 MB
      • Flash4 MB
    • EnclosureBlack Finished Steel
    • Installation MethodPanel mountable
    • LED Indicators100MB Ethernet, Collision, Ethernet Link/Activity, RX/TX per port, and Status
    • Dimensions10.8" x 1.8" x 6.3"
      274.3 x 45.7 x 160 mm
    • Product Weight 4.86 lbs
      2.2 kg
    Electrical Specifications
    • Device
      • DC Input Voltage9-30VDC
      • Current Consumption +24VDC 290 mA
      • Power Consumption (maximum) 7.0 W
    • Comtrol External Power Supply
      • Output Voltage 9-30VDC
      • Output Current +24VDC 500 mA
      • Line Frequency 47-63 Hz
      • Line Voltage 90-264 VAC
    • ESD Surge Protection Provides minimum of 25KV for all serial lines. All Ethernet components are rated to 1.5KV magnetic surge protection.
    Environmental Specifications
    • Air temperature
      • System On -40 to 75° C
      • System Off -40 to 85° C
    • Operating Humidity (non-condensing) 5% to 95%
    • Altitude 0 to 10,000 Feet
      3,048 m
    • Heat Output 23.7 BTU/Hr
    • MTBF (Mean Time Between Failures) 18.2 Years

    Serial Communications

    • Connector TypeDB9M/RJ45F
    • Number of Ports8
    • Software Selectable RS-232, RS-422, or RS-485
    • Baud Rate300 bps to 230.4 kbps
      • Receive Buffer1024 bytes
      • Transmit Buffer256 bytes
    • Device Driver Data Control
      • Data Bits7 or 8
      • Parityodd, even, or none
      • Stop Bits1 or 2
      • Flow ControlHardware, Software, or None
    Ethernet Specifications
    • Network Protocols ARP, BOOTP, DHCP/RARP/Ping, HTTP, ICMP, SNMP (MIB-II), TCP/IP & UDP socket services, Telnet, TFTP, and supports IP multicast data transmission
    • Connector TypeRJ45F
    • Number of Ports2


    • SNMP SupportMonitoring only.
    • OtherEvent notification, Lowest latency, NS-Link COM/TTY port redirector, PortVision remote management, and Watchdog reset
    • Manufacturer's Warranty 5 Years
    Export Information
    • Packaged Shipping Weight7.90 lbs
      3.58 kg
    • Package Dimensions14.9" x 4"x 10.9"
      378.5 x 101.6 x 276.9 mm
    • UPC Code7-56727-99443-5
    • ECCN5A992
    • Schedule B Number8471.80.1000

    Device Drivers

    Regulatory Approvals
    • Emissions Canadian EMC requirements ICES-003 CISPR-22
      European Standard EN55022 FCC Part 15 Subpart B Class A limit
    • Immunity European Standard EN55024 IEC 1000-4-2/EN61000-4-2: ESD
      IEC 1000-4-3/EN61000-4-3: RF
      IEC 1000-4-4/EN61000-4-4: Fast Transient
      IEC 1000-4-5/EN61000-4-5: Surge
      IEC 1000-4-6/EN61000-4-6: Conducted Disturbance
      IEC 1000-4-8/EN61000-4-8: Magnetic Field
      IEC 1000-4-11/EN61000-4-11: Dips and Voltage Variations
    • Safety IEC 60950/EN60950
      CSA C22.2 No. 60950/UL60950
    • Other Regulatory Approvals

    • Pinout Diagram

    Find a Distributor

    » Industrial Distributors
    » North American Distributors
    » International Distributors

    Pre-Sales Questions

    Comtrol's Pre-sales Team
    For sales questions or to locate a reseller near you.

    +1-800-926-6876 (1-800-Go Rocket)
    Fax: +1-763-957-6001
    [email protected]

    Comtrol's Industrial Automation Sales
    For sales questions or to locate an industrial distributor near you.

    +1-800-926-6876 (1-800-Go Rocket)
    Fax: +1-763-957-6001
    [email protected]

    DocumentDescriptionDownload File
    DeviceMaster ® PRO 8-Port User GuideContains detailed installation procedures and configuration information.
    Product Support and Service Information

    Part Number 99443-5

    Sales Support

    Call +1.763.957.6000, or e-mail [email protected]

    Technical Support

    For technical assistance, our U.S.-based technical support team is only a phone call away.

    Call +1.763.957.6000, or visit our forum .


    Comtrol offers a 30-Day satisfaction guarantee and a 5-year limited warranty on all DeviceMaster PRO family products!

    View Warranty

    Extended Warranty Available

    Software & Drivers
    » Comtrol FTP Site