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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 Pepperl+Fuchs 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
    • SDRAM32 MB
    • Flash8 MB
  • EnclosureBlack Power Coated Finished Steel
  • Installation MethodPanel mountable
  • LED Indicators100Mb Ethernet, Collision, Ethernet Link/Activity, Device Status, and RX/TX Per Port
  • Dimensions10.8" x 6.3" x 1.8"
    275 x 160 x 45.7 mm
  • Product Weight3.6 lbs
    1.53 kg
Electrical Specifications
  • Input Voltage Requirements9-30VDC
  • Power Consumption (maximum)3.6 Watts
    • Input90-254VAC @ 47- 63Hz
    • Output24VDC @ 1A
  • ESD Surge ProtectionProvides minimum of 25KV for a duration of 1ns @ 200A for all Serial Lines. All Ethernet components are rated to 1.5KV magnetic surge protection in addition to the surge protection levels specified.
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
  • MTBF (Mean Time Between Failures)24.7 Years

Serial Communications

  • Connector TypeDB9M
  • Number of Ports8
  • Serial Interfaces (Software selectable)RS-232
    RS-485, 4-wire, Master
    RS-485, 4-wire, Slave
    RS-485. 2-wire
  • Baud Rate300 bps to 230.4 kbps
    • Receive Buffer4.5 KB
    • Transmit Buffer4.5 KB
  • Device Driver Data Control
    • Data Bits5, 6, 7 or 8
    • Parityodd, even, Mark, Space or none
    • Stop Bits1, 1.5, or 2
    • Flow ControlHardware, Software, or None
Ethernet Specifications
  • Number of Ports2
  • Speed10/100Mbps
  • Connector TypeRJ45F
  • Ethernet specific featuresEthernet packet switching, Auto Negotiation, Auto MDI/MDI-X and Daisy Chaining
  • Network ProtocolsARP, BOOTP, DHCP/RARP, HTTP, HTTPS, SSH, SSL/TLS, ICMP, RFC 1006 (ISO over TCP), SNMP (MIB-II), TCP/IP & UDP socket services, Telnet, TFTP and supports IP multicast data transmission


  • SNMP SupportMonitoring only.
  • Other Software FeaturesWindows Serial COM ports with SSL support
    Linux Serial TTY ports
    Windows Secure COM Port redirector
    TCP/IP & UDP Socket Services
    SSL / SSH Security Layers
    Telnet / RFC2217 COM Port control
    PortVision DX remote management
  • Manufacturer's Warranty 5 Years
  • IncludesPower Supply
    US Power cord
    Euro Power cord
    Loopback test plug
    Rubber bumpers, mounting brackets, & screws
    Qty of 8 - DB9F to RJ45F Adapters
Export Information
  • Packaged Shipping Weight6.9 lbs
    3.0 kg
  • Package Dimensions14.9" x 10.9" x 4"
    378.5 x 276.9 x 101.6 mm
  • UPC Code7-56727-99443-5
  • Country of OriginUSA
  • ECCN5A992
  • Schedule B Number8471.80.1000

Device Drivers

  • Linux
  • Microsoft® Windows®Microsoft® Windows® 7, 8, 8.1, and 10
    Microsoft® Windows Server® 2008 R2, 2012, 2012 R2, 2016 and 2019
    Microsoft® Windows® XP, and Vista (Legacy)
    Microsoft® Windows Server® 2003, 2003 R2, and 2008 (Legacy)
Regulatory Approvals
  • Emissions FCC Part 15 Subpart B Class A limit
    Canadian EMC requirements ICES-003
    European Standard EN55022
  • ImmunityEuropean Standard EN55024
  • SafetyIEC 60950/EN60950
    CSA C22.2 No. 60950/UL60950
  • OtherEuropean Standard: 2015/863/EU (RoHS 3) Directive.
    NEMA TS2 Compliant
  • Other Regulatory ApprovalsCE Check MarkCUL1 NEMA TS2
Pinout Diagrams
  • Ground must be tied to signal ground.Pinout Diagrams
    Pinout Diagram
Find a Distributor

» Industrial Distributors
» North American Distributors
» International Distributors

Pre-Sales Questions

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

Fax: +1.330.405.4710
[email protected]

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

Fax: +1.330.405.4710
[email protected]

Product Support and Service Information

Part Number 99443-5

Sales Support

Call +1.330.486.0001, or e-mail [email protected]

Technical Support

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

Call +1.330.486.0001, or visit our forum .


Pepperl+Fuchs 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