DeviceMaster ® RTS VDC 1-Port DB9

This industrial DeviceMaster 1-Port DB9 Ethernet device server has no serial cable distance limitations and will provide your business with an excellent networking solution

Part Number: 99440-4

PortVision DXweb


The Comtrol DeviceMaster RTS 1-Port VDC DB9 is a single-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 RTS 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 RTS 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. DeviceMaster RTS VDC products are designed specifically for use where an existing power source from 5-30 VDC will be used. This product is fully compliant with RoHS 2.

View Engineering Drawing

  • DeviceMaster RTS VDC 1 Port Device
  • DB9F to DB25M Adapter
  • Loopback Plug
  • 35mm DIN Rail clips & Screws
  • Power Connector
  • Bus Interface Specification 10/100 BASE-T
  • Memory
    • SDRAM 8 MB
    • Flash 4 MB
  • Installation Method Panel Mountable or DIN Rail
  • LED Indicators 100MB Ethernet, Duplex, Ethernet Link/Activity, and Status
  • Dimensions 3.6" x 0.8" x 2.8"
    91.4 x 20.3 x 71.1 mm
  • Product Weight 212.62 g
Electrical Specifications
  • Device
    • DC Input Voltage 5-30VDC
    • Current Consumption +5VDC 500 mA
    • Power Consumption (maximum)2.5 W
  • ESD Surge Protection Provides minimum of 15KV protection for all serial lines. All Ethernet components are rated to 1.5KV magnetic surge protection.
Environmental Specifications
  • Air temperature
    • System On -37 to 74° 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 8.5 BTU/Hr
  • MTBF (Mean Time Between Failures)46.2 Years

Serial Communications

  • Connector Type DB9M
  • Number of Ports 1
  • Software Selectable Interfaces RS-232
  • Baud Rate 300 bps to 230.4 kbps
    • Receive Buffer 1024bytes
    • Transmit Buffer 256bytes
  • Device Driver Data Control
    • Data Bits 7 or 8
    • Parity odd, even, or none
    • Stop Bits 1 or 2
    • Flow Control Hardware, Software, or None
Ethernet Specifications
  • Network ProtocolsARP, BOOTP, DHCP/RARP/Ping, HTTP, ICMP, RFC 1006 (ISO over TCP), SNMP (MIB-II), TCP/IP & UDP socket services, Telnet, TFTP, and supports IP multicast data transmission
  • Connector Type RJ45F Auto MDI/MDI-X
  • Number of Ports 1


  • SNMP Support Monitoring only.
  • Manufacturer's Warranty 5 Years
Export Information
  • Packaged Shipping Weight1.66lbs
    0.75 kg
  • Package Dimensions9.18" x 7.25" x 2.5"
    233.2 x 184,2 x 63.5 mm
  • UPC Code7-56727-99440-4
  • Country of Origin USA
  • ECCN 5A992
  • Schedule B Number 8471.80.1000

Device Drivers

Regulatory Approvals
  • Emissions Canadian EMC requirements
    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 Third Edition
  • 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

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

DocumentDescriptionDownload File
DeviceMaster ® RTS VDC 1-Port DB9 User GuideContains detailed installation procedures and configuration information.
Product Support and Service Information

Part Number: 99440-4

Sales Support

Call +1.763.957.6000, or e-mail

Technical Support

For technical assistance, our U.S.+1.763.957.6000, or visit our forum .


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

View Warranty

Extended Warranty Available

Software & Drivers
» Comtrol FTP Site