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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


  • 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
  • Ground must be tied to signal ground.Pinout Diagrams
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

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

Product Support and Service Information

Part Number 99443-5

Sales Support

Call +1.763.957.6000, or e-mail

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